diff --git a/dist/vue-ladda.js b/dist/vue-ladda.js
index 0278008..3e2705e 100644
--- a/dist/vue-ladda.js
+++ b/dist/vue-ladda.js
@@ -1,4 +1,4 @@
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transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n}\n.ladda-button[data-style=zoom-in],\n.ladda-button[data-style=zoom-in] .ladda-spinner,\n.ladda-button[data-style=zoom-in] .ladda-label,\n.ladda-button[data-style=zoom-out],\n.ladda-button[data-style=zoom-out] .ladda-spinner,\n.ladda-button[data-style=zoom-out] .ladda-label {\n  -webkit-transition: 0.3s ease all !important;\n  -moz-transition: 0.3s ease all !important;\n  -ms-transition: 0.3s ease all !important;\n  -o-transition: 0.3s ease all !important;\n  transition: 0.3s ease all !important;\n}\n\n/*************************************\r\n * EXPAND RIGHT\r\n */\n.ladda-button[data-style=expand-right] .ladda-spinner {\n  right: -6px;\n}\n.ladda-button[data-style=expand-right][data-size="s"] .ladda-spinner,\n.ladda-button[data-style=expand-right][data-size="xs"] .ladda-spinner {\n  right: -12px;\n}\n.ladda-button[data-style=expand-right][data-loading] {\n  padding-right: 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 -o-transform: scale(0.2);\n  transform: scale(0.2);\n}\n.ladda-button[data-style=zoom-in] .ladda-label {\n  position: relative;\n  display: inline-block;\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-label {\n  opacity: 0;\n  -webkit-transform: scale(2.2);\n  -moz-transform: scale(2.2);\n  -ms-transform: scale(2.2);\n  -o-transform: scale(2.2);\n  transform: scale(2.2);\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-spinner {\n  opacity: 1;\n  margin-left: 0;\n  -webkit-transform: none;\n  -moz-transform: none;\n  -ms-transform: none;\n  -o-transform: none;\n  transform: none;\n}\n\n/*************************************\r\n * CONTRACT\r\n */\n.ladda-button[data-style=contract] {\n  overflow: hidden;\n  width: 100px;\n}\n.ladda-button[data-style=contract] .ladda-spinner {\n  left: 50%;\n  margin-left: 0;\n}\n.ladda-button[data-style=contract][data-loading] {\n  border-radius: 50%;\n  width: 52px;\n}\n.ladda-button[data-style=contract][data-loading] 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*/\n.ladda-button .ladda-progress {\n  position: absolute;\n  width: 0;\n  height: 100%;\n  left: 0;\n  top: 0;\n  background: rgba(0, 0, 0, 0.2);\n  display: none;\n  -webkit-transition: 0.1s linear all !important;\n  -moz-transition: 0.1s linear all !important;\n  -ms-transition: 0.1s linear all !important;\n  -o-transition: 0.1s linear all !important;\n  transition: 0.1s linear all !important;\n}\n.ladda-button[data-loading] .ladda-progress {\n  display: block;\n}\n\n/*************************************\r\n * EASING\r\n */\n.ladda-button,\n.ladda-button .ladda-spinner,\n.ladda-button .ladda-label {\n  -webkit-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -moz-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -ms-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -o-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n}\n.ladda-button[data-style=zoom-in],\n.ladda-button[data-style=zoom-in] .ladda-spinner,\n.ladda-button[data-style=zoom-in] .ladda-label,\n.ladda-button[data-style=zoom-out],\n.ladda-button[data-style=zoom-out] .ladda-spinner,\n.ladda-button[data-style=zoom-out] .ladda-label {\n  -webkit-transition: 0.3s ease all !important;\n  -moz-transition: 0.3s ease all !important;\n  -ms-transition: 0.3s ease all !important;\n  -o-transition: 0.3s ease all !important;\n  transition: 0.3s ease all !important;\n}\n\n/*************************************\r\n * EXPAND RIGHT\r\n */\n.ladda-button[data-style=expand-right] .ladda-spinner {\n  right: -6px;\n}\n.ladda-button[data-style=expand-right][data-size="s"] .ladda-spinner,\n.ladda-button[data-style=expand-right][data-size="xs"] .ladda-spinner {\n  right: -12px;\n}\n.ladda-button[data-style=expand-right][data-loading] {\n  padding-right: 56px;\n}\n.ladda-button[data-style=expand-right][data-loading] .ladda-spinner {\n    opacity: 1;\n}\n.ladda-button[data-style=expand-right][data-loading][data-size="s"], .ladda-button[data-style=expand-right][data-loading][data-size="xs"] {\n    padding-right: 40px;\n}\n\n/*************************************\r\n * EXPAND LEFT\r\n */\n.ladda-button[data-style=expand-left] .ladda-spinner {\n  left: 26px;\n}\n.ladda-button[data-style=expand-left][data-size="s"] .ladda-spinner,\n.ladda-button[data-style=expand-left][data-size="xs"] .ladda-spinner {\n  left: 4px;\n}\n.ladda-button[data-style=expand-left][data-loading] {\n  padding-left: 56px;\n}\n.ladda-button[data-style=expand-left][data-loading] .ladda-spinner {\n    opacity: 1;\n}\n.ladda-button[data-style=expand-left][data-loading][data-size="s"], .ladda-button[data-style=expand-left][data-loading][data-size="xs"] {\n    padding-left: 40px;\n}\n\n/*************************************\r\n * EXPAND UP\r\n */\n.ladda-button[data-style=expand-up] {\n  overflow: hidden;\n}\n.ladda-button[data-style=expand-up] .ladda-spinner {\n    top: -32px;\n    left: 50%;\n    margin-left: 0;\n}\n.ladda-button[data-style=expand-up][data-loading] {\n    padding-top: 54px;\n}\n.ladda-button[data-style=expand-up][data-loading] .ladda-spinner {\n      opacity: 1;\n      top: 26px;\n      margin-top: 0;\n}\n.ladda-button[data-style=expand-up][data-loading][data-size="s"], .ladda-button[data-style=expand-up][data-loading][data-size="xs"] {\n      padding-top: 32px;\n}\n.ladda-button[data-style=expand-up][data-loading][data-size="s"] .ladda-spinner, .ladda-button[data-style=expand-up][data-loading][data-size="xs"] .ladda-spinner {\n        top: 4px;\n}\n\n/*************************************\r\n * EXPAND DOWN\r\n */\n.ladda-button[data-style=expand-down] {\n  overflow: hidden;\n}\n.ladda-button[data-style=expand-down] .ladda-spinner {\n    top: 62px;\n    left: 50%;\n    margin-left: 0;\n}\n.ladda-button[data-style=expand-down][data-size="s"] .ladda-spinner,\n  .ladda-button[data-style=expand-down][data-size="xs"] .ladda-spinner {\n    top: 40px;\n}\n.ladda-button[data-style=expand-down][data-loading] {\n    padding-bottom: 54px;\n}\n.ladda-button[data-style=expand-down][data-loading] .ladda-spinner {\n      opacity: 1;\n}\n.ladda-button[data-style=expand-down][data-loading][data-size="s"], .ladda-button[data-style=expand-down][data-loading][data-size="xs"] {\n      padding-bottom: 32px;\n}\n\n/*************************************\r\n * SLIDE LEFT\r\n */\n.ladda-button[data-style=slide-left] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-left] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-left] .ladda-spinner {\n    left: 100%;\n    margin-left: 0;\n}\n.ladda-button[data-style=slide-left][data-loading] .ladda-label {\n    opacity: 0;\n    left: -100%;\n}\n.ladda-button[data-style=slide-left][data-loading] .ladda-spinner {\n    opacity: 1;\n    left: 50%;\n}\n\n/*************************************\r\n * SLIDE RIGHT\r\n */\n.ladda-button[data-style=slide-right] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-right] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-right] .ladda-spinner {\n    right: 100%;\n    margin-left: 0;\n    left: 16px;\n}\n[dir="rtl"] .ladda-button[data-style=slide-right] .ladda-spinner {\n      right: auto;\n}\n.ladda-button[data-style=slide-right][data-loading] .ladda-label {\n    opacity: 0;\n    left: 100%;\n}\n.ladda-button[data-style=slide-right][data-loading] .ladda-spinner {\n    opacity: 1;\n    left: 50%;\n}\n\n/*************************************\r\n * SLIDE UP\r\n */\n.ladda-button[data-style=slide-up] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-up] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-up] .ladda-spinner {\n    left: 50%;\n    margin-left: 0;\n    margin-top: 1em;\n}\n.ladda-button[data-style=slide-up][data-loading] .ladda-label {\n    opacity: 0;\n    top: -1em;\n}\n.ladda-button[data-style=slide-up][data-loading] .ladda-spinner {\n    opacity: 1;\n    margin-top: 0;\n}\n\n/*************************************\r\n * SLIDE DOWN\r\n */\n.ladda-button[data-style=slide-down] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-down] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-down] .ladda-spinner {\n    left: 50%;\n    margin-left: 0;\n    margin-top: -2em;\n}\n.ladda-button[data-style=slide-down][data-loading] .ladda-label {\n    opacity: 0;\n    top: 1em;\n}\n.ladda-button[data-style=slide-down][data-loading] .ladda-spinner {\n    opacity: 1;\n    margin-top: 0;\n}\n\n/*************************************\r\n * ZOOM-OUT\r\n */\n.ladda-button[data-style=zoom-out] {\n  overflow: hidden;\n}\n.ladda-button[data-style=zoom-out] .ladda-spinner {\n  left: 50%;\n  margin-left: 32px;\n  -webkit-transform: scale(2.5);\n  -moz-transform: scale(2.5);\n  -ms-transform: scale(2.5);\n  -o-transform: scale(2.5);\n  transform: scale(2.5);\n}\n.ladda-button[data-style=zoom-out] .ladda-label {\n  position: relative;\n  display: inline-block;\n}\n.ladda-button[data-style=zoom-out][data-loading] .ladda-label {\n  opacity: 0;\n  -webkit-transform: scale(0.5);\n  -moz-transform: scale(0.5);\n  -ms-transform: scale(0.5);\n  -o-transform: scale(0.5);\n  transform: scale(0.5);\n}\n.ladda-button[data-style=zoom-out][data-loading] .ladda-spinner {\n  opacity: 1;\n  margin-left: 0;\n  -webkit-transform: none;\n  -moz-transform: none;\n  -ms-transform: none;\n  -o-transform: none;\n  transform: none;\n}\n\n/*************************************\r\n * ZOOM-IN\r\n */\n.ladda-button[data-style=zoom-in] {\n  overflow: hidden;\n}\n.ladda-button[data-style=zoom-in] .ladda-spinner {\n  left: 50%;\n  margin-left: -16px;\n  -webkit-transform: scale(0.2);\n  -moz-transform: scale(0.2);\n  -ms-transform: scale(0.2);\n  -o-transform: scale(0.2);\n  transform: scale(0.2);\n}\n.ladda-button[data-style=zoom-in] .ladda-label {\n  position: relative;\n  display: inline-block;\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-label {\n  opacity: 0;\n  -webkit-transform: scale(2.2);\n  -moz-transform: scale(2.2);\n  -ms-transform: scale(2.2);\n  -o-transform: scale(2.2);\n  transform: scale(2.2);\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-spinner {\n  opacity: 1;\n  margin-left: 0;\n  -webkit-transform: none;\n  -moz-transform: none;\n  -ms-transform: none;\n  -o-transform: none;\n  transform: none;\n}\n\n/*************************************\r\n * CONTRACT\r\n */\n.ladda-button[data-style=contract] {\n  overflow: hidden;\n  width: 100px;\n}\n.ladda-button[data-style=contract] .ladda-spinner {\n  left: 50%;\n  margin-left: 0;\n}\n.ladda-button[data-style=contract][data-loading] {\n  border-radius: 50%;\n  width: 52px;\n}\n.ladda-button[data-style=contract][data-loading] .ladda-label {\n  opacity: 0;\n}\n.ladda-button[data-style=contract][data-loading] .ladda-spinner {\n  opacity: 1;\n}\n\n/*************************************\r\n * OVERLAY\r\n */\n.ladda-button[data-style=contract-overlay] {\n  overflow: hidden;\n  width: 100px;\n  box-shadow: 0px 0px 0px 2000px rgba(0, 0, 0, 0);\n}\n.ladda-button[data-style=contract-overlay] .ladda-spinner {\n  left: 50%;\n  margin-left: 0;\n}\n.ladda-button[data-style=contract-overlay][data-loading] {\n  border-radius: 50%;\n  width: 52px;\n  /*outline: 10000px solid rgba( 0, 0, 0, 0.5 );*/\n  box-shadow: 0px 0px 0px 2000px rgba(0, 0, 0, 0.8);\n}\n.ladda-button[data-style=contract-overlay][data-loading] .ladda-label {\n  opacity: 0;\n}\n.ladda-button[data-style=contract-overlay][data-loading] .ladda-spinner {\n  opacity: 1;\n}\n[dir="rtl"] .ladda-spinner > div {\n  left: 25% !important;\n}\n\n/*************************************\r\n * CONFIG\r\n */\n/*************************************\r\n * BUTTON THEME\r\n */\n.ladda-button {\n  background: #666;\n  border: 0;\n  padding: 14px 18px;\n  font-size: 18px;\n  cursor: pointer;\n  color: #fff;\n  border-radius: 2px;\n  border: 1px solid transparent;\n  -webkit-appearance: none;\n  -webkit-font-smoothing: antialiased;\n  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\n}\n.ladda-button:hover {\n    border-color: rgba(0, 0, 0, 0.07);\n    background-color: #888;\n}\n.ladda-button[data-color=green] {\n    background: #2aca76;\n}\n.ladda-button[data-color=green]:hover {\n      background-color: #38d683;\n}\n.ladda-button[data-color=blue] {\n    background: #53b5e6;\n}\n.ladda-button[data-color=blue]:hover {\n      background-color: #69bfe9;\n}\n.ladda-button[data-color=red] {\n    background: #ea8557;\n}\n.ladda-button[data-color=red]:hover {\n      background-color: #ed956e;\n}\n.ladda-button[data-color=purple] {\n    background: #9973C2;\n}\n.ladda-button[data-color=purple]:hover {\n      background-color: #a685ca;\n}\n.ladda-button[data-color=mint] {\n    background: #16a085;\n}\n.ladda-button[data-color=mint]:hover {\n      background-color: #19b698;\n}\n.ladda-button[disabled], .ladda-button[data-loading] {\n    border-color: rgba(0, 0, 0, 0.07);\n}\n.ladda-button[disabled], .ladda-button[disabled]:hover, .ladda-button[data-loading], .ladda-button[data-loading]:hover {\n      cursor: default;\n      background-color: #999;\n}\n.ladda-button[data-size=xs] {\n    padding: 4px 8px;\n}\n.ladda-button[data-size=xs] .ladda-label {\n      font-size: 0.7em;\n}\n.ladda-button[data-size=s] {\n    padding: 6px 10px;\n}\n.ladda-button[data-size=s] .ladda-label {\n      font-size: 0.9em;\n}\n.ladda-button[data-size=l] .ladda-label {\n    font-size: 1.2em;\n}\n.ladda-button[data-size=xl] .ladda-label {\n    font-size: 1.5em;\n}\n',""])},function(n,t){function a(n,t){var a=n[1]||"",d=n[3];if(!d)return a;if(t&&"function"==typeof btoa){var o=e(d);return[a].concat(d.sources.map(function(n){return"/*# sourceURL="+d.sourceRoot+n+" */"})).concat([o]).join("\n")}return[a].join("\n")}function e(n){return"/*# sourceMappingURL=data:application/json;charset=utf-8;base64,"+btoa(unescape(encodeURIComponent(JSON.stringify(n))))+" */"}n.exports=function(n){var t=[];return t.toString=function(){return this.map(function(t){var e=a(t,n);return t[2]?"@media "+t[2]+"{"+e+"}":e}).join("")},t.i=function(n,a){"string"==typeof n&&(n=[[null,n,""]]);for(var e={},d=0;d<this.length;d++){var o=this[d][0];"number"==typeof o&&(e[o]=!0)}for(d=0;d<n.length;d++){var r=n[d];"number"==typeof r[0]&&e[r[0]]||(a&&!r[2]?r[2]=a:a&&(r[2]="("+r[2]+") and ("+a+")"),t.push(r))}},t}},function(n,t,a){/*!
  * Ladda
  * http://lab.hakim.se/ladda
  * MIT licensed
diff --git a/docs/vue-ladda.js b/docs/vue-ladda.js
index c083ac8..3e2705e 100644
--- a/docs/vue-ladda.js
+++ b/docs/vue-ladda.js
@@ -1,8 +1,8 @@
-!function(n,t){"object"==typeof exports&&"object"==typeof module?module.exports=t():"function"==typeof define&&define.amd?define([],t):"object"==typeof exports?exports.VueLadda=t():n.VueLadda=t()}(this,function(){return function(n){function t(e){if(a[e])return a[e].exports;var o=a[e]={i:e,l:!1,exports:{}};return n[e].call(o.exports,o,o.exports,t),o.l=!0,o.exports}var a={};return t.m=n,t.c=a,t.i=function(n){return n},t.d=function(n,a,e){t.o(n,a)||Object.defineProperty(n,a,{configurable:!1,enumerable:!0,get:e})},t.n=function(n){var a=n&&n.__esModule?function(){return n.default}:function(){return n};return t.d(a,"a",a),a},t.o=function(n,t){return Object.prototype.hasOwnProperty.call(n,t)},t.p="",t(t.s=2)}([function(n,t,a){a(9);var e=a(7)(a(1),a(8),null,null);e.options.__file="/Users/zcfan/Dev/vue-ladda/src/vue-ladda.vue",e.esModule&&Object.keys(e.esModule).some(function(n){return"default"!==n&&"__esModule"!==n})&&console.error("named exports are not supported in *.vue files."),e.options.functional&&console.error("[vue-loader] vue-ladda.vue: functional components are not supported with templates, they should use render functions."),n.exports=e.exports},function(n,t,a){"use strict";Object.defineProperty(t,"__esModule",{value:!0});var e=a(5),o=function(n){return n&&n.__esModule?n:{default:n}}(e);t.default={name:"VueLadda",props:{dataStyle:{type:String,default:"expand-left"},loading:{type:Boolean,required:!0},progress:{validator:function(n){return n>=0&&n<=1},default:0}},watch:{loading:function(n){n?this.ladda.start():this.ladda.stop()},progress:function(n){this.ladda.setProgress(n)}},methods:{handleClick:function(n){this.$emit("click",n)}},mounted:function(){this.ladda=o.default.create(this.$refs.ladda),this.loading?this.ladda.start():this.ladda.stop()},beforeDestroy:function(){this.ladda.remove(),delete this.ladda}}},function(n,t,a){"use strict";Object.defineProperty(t,"__esModule",{value:!0});var e=a(0),o=function(n){return n&&n.__esModule?n:{default:n}}(e),d={install:function(n,t){n.component("vue-ladda",o.default)}};"undefined"!=typeof window&&window.Vue&&window.Vue.use(d),t.default=o.default},function(n,t,a){t=n.exports=a(4)(void 0),t.push([n.i,'/*!\n * Ladda including the default theme.\n */\n/*!\n * Ladda\n * http://lab.hakim.se/ladda\n * MIT licensed\n *\n * Copyright (C) 2016 Hakim El Hattab, http://hakim.se\n */\n/*************************************\n * CONFIG\n */\n/*************************************\n * MIXINS\n */\n/*************************************\n * BUTTON BASE\n */\n.ladda-button {\n  position: relative;\n}\n\n/* Spinner animation */\n.ladda-button .ladda-spinner {\n  position: absolute;\n  z-index: 2;\n  display: inline-block;\n  width: 32px;\n  height: 32px;\n  top: 50%;\n  margin-top: 0;\n  opacity: 0;\n  pointer-events: none;\n}\n\n/* Button label */\n.ladda-button .ladda-label {\n  position: relative;\n  z-index: 3;\n}\n\n/* Progress bar */\n.ladda-button .ladda-progress {\n  position: absolute;\n  width: 0;\n  height: 100%;\n  left: 0;\n  top: 0;\n  background: rgba(0, 0, 0, 0.2);\n  visibility: hidden;\n  opacity: 0;\n  -webkit-transition: 0.1s linear all !important;\n  -moz-transition: 0.1s linear all !important;\n  -ms-transition: 0.1s linear all !important;\n  -o-transition: 0.1s linear all !important;\n  transition: 0.1s linear all !important;\n}\n.ladda-button[data-loading] .ladda-progress {\n  opacity: 1;\n  visibility: visible;\n}\n\n/*************************************\n * EASING\n */\n.ladda-button,\n.ladda-button .ladda-spinner,\n.ladda-button .ladda-label {\n  -webkit-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -moz-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -ms-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -o-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n}\n.ladda-button[data-style=zoom-in],\n.ladda-button[data-style=zoom-in] .ladda-spinner,\n.ladda-button[data-style=zoom-in] .ladda-label,\n.ladda-button[data-style=zoom-out],\n.ladda-button[data-style=zoom-out] .ladda-spinner,\n.ladda-button[data-style=zoom-out] .ladda-label {\n  -webkit-transition: 0.3s ease all !important;\n  -moz-transition: 0.3s ease all !important;\n  -ms-transition: 0.3s ease all !important;\n  -o-transition: 0.3s ease all !important;\n  transition: 0.3s ease all !important;\n}\n\n/*************************************\n * EXPAND LEFT\n */\n.ladda-button[data-style=expand-right] .ladda-spinner {\n  right: -6px;\n}\n.ladda-button[data-style=expand-right][data-size="s"] .ladda-spinner,\n.ladda-button[data-style=expand-right][data-size="xs"] .ladda-spinner {\n  right: -12px;\n}\n.ladda-button[data-style=expand-right][data-loading] {\n  padding-right: 56px;\n}\n.ladda-button[data-style=expand-right][data-loading] .ladda-spinner {\n    opacity: 1;\n}\n.ladda-button[data-style=expand-right][data-loading][data-size="s"], .ladda-button[data-style=expand-right][data-loading][data-size="xs"] {\n    padding-right: 40px;\n}\n\n/*************************************\n * EXPAND RIGHT\n */\n.ladda-button[data-style=expand-left] .ladda-spinner {\n  left: 26px;\n}\n.ladda-button[data-style=expand-left][data-size="s"] .ladda-spinner,\n.ladda-button[data-style=expand-left][data-size="xs"] .ladda-spinner {\n  left: 4px;\n}\n.ladda-button[data-style=expand-left][data-loading] {\n  padding-left: 56px;\n}\n.ladda-button[data-style=expand-left][data-loading] .ladda-spinner {\n    opacity: 1;\n}\n.ladda-button[data-style=expand-left][data-loading][data-size="s"], .ladda-button[data-style=expand-left][data-loading][data-size="xs"] {\n    padding-left: 40px;\n}\n\n/*************************************\n * EXPAND UP\n */\n.ladda-button[data-style=expand-up] {\n  overflow: hidden;\n}\n.ladda-button[data-style=expand-up] .ladda-spinner {\n    top: -32px;\n    left: 50%;\n    margin-left: 0;\n}\n.ladda-button[data-style=expand-up][data-loading] {\n    padding-top: 54px;\n}\n.ladda-button[data-style=expand-up][data-loading] .ladda-spinner {\n      opacity: 1;\n      top: 26px;\n      margin-top: 0;\n}\n.ladda-button[data-style=expand-up][data-loading][data-size="s"], .ladda-button[data-style=expand-up][data-loading][data-size="xs"] {\n      padding-top: 32px;\n}\n.ladda-button[data-style=expand-up][data-loading][data-size="s"] .ladda-spinner, .ladda-button[data-style=expand-up][data-loading][data-size="xs"] .ladda-spinner {\n        top: 4px;\n}\n\n/*************************************\n * EXPAND DOWN\n */\n.ladda-button[data-style=expand-down] {\n  overflow: hidden;\n}\n.ladda-button[data-style=expand-down] .ladda-spinner {\n    top: 62px;\n    left: 50%;\n    margin-left: 0;\n}\n.ladda-button[data-style=expand-down][data-size="s"] .ladda-spinner,\n  .ladda-button[data-style=expand-down][data-size="xs"] .ladda-spinner {\n    top: 40px;\n}\n.ladda-button[data-style=expand-down][data-loading] {\n    padding-bottom: 54px;\n}\n.ladda-button[data-style=expand-down][data-loading] .ladda-spinner {\n      opacity: 1;\n}\n.ladda-button[data-style=expand-down][data-loading][data-size="s"], .ladda-button[data-style=expand-down][data-loading][data-size="xs"] {\n      padding-bottom: 32px;\n}\n\n/*************************************\n * SLIDE LEFT\n */\n.ladda-button[data-style=slide-left] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-left] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-left] .ladda-spinner {\n    left: 100%;\n    margin-left: 0;\n}\n.ladda-button[data-style=slide-left][data-loading] .ladda-label {\n    opacity: 0;\n    left: -100%;\n}\n.ladda-button[data-style=slide-left][data-loading] .ladda-spinner {\n    opacity: 1;\n    left: 50%;\n}\n\n/*************************************\n * SLIDE RIGHT\n */\n.ladda-button[data-style=slide-right] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-right] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-right] .ladda-spinner {\n    right: 100%;\n    margin-left: 0;\n    left: 16px;\n}\n.ladda-button[data-style=slide-right][data-loading] .ladda-label {\n    opacity: 0;\n    left: 100%;\n}\n.ladda-button[data-style=slide-right][data-loading] .ladda-spinner {\n    opacity: 1;\n    left: 50%;\n}\n\n/*************************************\n * SLIDE UP\n */\n.ladda-button[data-style=slide-up] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-up] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-up] .ladda-spinner {\n    left: 50%;\n    margin-left: 0;\n    margin-top: 1em;\n}\n.ladda-button[data-style=slide-up][data-loading] .ladda-label {\n    opacity: 0;\n    top: -1em;\n}\n.ladda-button[data-style=slide-up][data-loading] .ladda-spinner {\n    opacity: 1;\n    margin-top: 0;\n}\n\n/*************************************\n * SLIDE DOWN\n */\n.ladda-button[data-style=slide-down] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-down] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-down] .ladda-spinner {\n    left: 50%;\n    margin-left: 0;\n    margin-top: -2em;\n}\n.ladda-button[data-style=slide-down][data-loading] .ladda-label {\n    opacity: 0;\n    top: 1em;\n}\n.ladda-button[data-style=slide-down][data-loading] .ladda-spinner {\n    opacity: 1;\n    margin-top: 0;\n}\n\n/*************************************\n * ZOOM-OUT\n */\n.ladda-button[data-style=zoom-out] {\n  overflow: hidden;\n}\n.ladda-button[data-style=zoom-out] .ladda-spinner {\n  left: 50%;\n  margin-left: 32px;\n  -webkit-transform: scale(2.5);\n  -moz-transform: scale(2.5);\n  -ms-transform: scale(2.5);\n  -o-transform: scale(2.5);\n  transform: scale(2.5);\n}\n.ladda-button[data-style=zoom-out] .ladda-label {\n  position: relative;\n  display: inline-block;\n}\n.ladda-button[data-style=zoom-out][data-loading] .ladda-label {\n  opacity: 0;\n  -webkit-transform: scale(0.5);\n  -moz-transform: scale(0.5);\n  -ms-transform: scale(0.5);\n  -o-transform: scale(0.5);\n  transform: scale(0.5);\n}\n.ladda-button[data-style=zoom-out][data-loading] .ladda-spinner {\n  opacity: 1;\n  margin-left: 0;\n  -webkit-transform: none;\n  -moz-transform: none;\n  -ms-transform: none;\n  -o-transform: none;\n  transform: none;\n}\n\n/*************************************\n * ZOOM-IN\n */\n.ladda-button[data-style=zoom-in] {\n  overflow: hidden;\n}\n.ladda-button[data-style=zoom-in] .ladda-spinner {\n  left: 50%;\n  margin-left: -16px;\n  -webkit-transform: scale(0.2);\n  -moz-transform: scale(0.2);\n  -ms-transform: scale(0.2);\n  -o-transform: scale(0.2);\n  transform: scale(0.2);\n}\n.ladda-button[data-style=zoom-in] .ladda-label {\n  position: relative;\n  display: inline-block;\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-label {\n  opacity: 0;\n  -webkit-transform: scale(2.2);\n  -moz-transform: scale(2.2);\n  -ms-transform: scale(2.2);\n  -o-transform: scale(2.2);\n  transform: scale(2.2);\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-spinner {\n  opacity: 1;\n  margin-left: 0;\n  -webkit-transform: none;\n  -moz-transform: none;\n  -ms-transform: none;\n  -o-transform: none;\n  transform: none;\n}\n\n/*************************************\n * CONTRACT\n */\n.ladda-button[data-style=contract] {\n  overflow: hidden;\n  width: 100px;\n}\n.ladda-button[data-style=contract] .ladda-spinner {\n  left: 50%;\n  margin-left: 0;\n}\n.ladda-button[data-style=contract][data-loading] {\n  border-radius: 50%;\n  width: 52px;\n}\n.ladda-button[data-style=contract][data-loading] .ladda-label {\n  opacity: 0;\n}\n.ladda-button[data-style=contract][data-loading] .ladda-spinner {\n  opacity: 1;\n}\n\n/*************************************\n * OVERLAY\n */\n.ladda-button[data-style=contract-overlay] {\n  overflow: hidden;\n  width: 100px;\n  box-shadow: 0px 0px 0px 2000px transparent;\n}\n.ladda-button[data-style=contract-overlay] .ladda-spinner {\n  left: 50%;\n  margin-left: 0;\n}\n.ladda-button[data-style=contract-overlay][data-loading] {\n  border-radius: 50%;\n  width: 52px;\n  /*outline: 10000px solid rgba( 0, 0, 0, 0.5 );*/\n  box-shadow: 0px 0px 0px 2000px rgba(0, 0, 0, 0.8);\n}\n.ladda-button[data-style=contract-overlay][data-loading] .ladda-label {\n  opacity: 0;\n}\n.ladda-button[data-style=contract-overlay][data-loading] .ladda-spinner {\n  opacity: 1;\n}\n\n/*************************************\n * CONFIG\n */\n/*************************************\n * BUTTON THEME\n */\n.ladda-button {\n  background: #666;\n  border: 0;\n  padding: 14px 18px;\n  font-size: 18px;\n  cursor: pointer;\n  color: #fff;\n  border-radius: 2px;\n  border: 1px solid transparent;\n  -webkit-appearance: none;\n  -webkit-font-smoothing: antialiased;\n  -webkit-tap-highlight-color: transparent;\n}\n.ladda-button:hover {\n    border-color: rgba(0, 0, 0, 0.07);\n    background-color: #888;\n}\n.ladda-button[data-color=green] {\n    background: #2aca76;\n}\n.ladda-button[data-color=green]:hover {\n      background-color: #38d683;\n}\n.ladda-button[data-color=blue] {\n    background: #53b5e6;\n}\n.ladda-button[data-color=blue]:hover {\n      background-color: #69bfe9;\n}\n.ladda-button[data-color=red] {\n    background: #ea8557;\n}\n.ladda-button[data-color=red]:hover {\n      background-color: #ed956e;\n}\n.ladda-button[data-color=purple] {\n    background: #9973C2;\n}\n.ladda-button[data-color=purple]:hover {\n      background-color: #a685ca;\n}\n.ladda-button[data-color=mint] {\n    background: #16a085;\n}\n.ladda-button[data-color=mint]:hover {\n      background-color: #19b698;\n}\n.ladda-button[disabled], .ladda-button[data-loading] {\n    border-color: rgba(0, 0, 0, 0.07);\n}\n.ladda-button[disabled], .ladda-button[disabled]:hover, .ladda-button[data-loading], .ladda-button[data-loading]:hover {\n      cursor: default;\n      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e=a(0),d=function(n){return n&&n.__esModule?n:{default:n}}(e),o={install:function(n,t){n.component("vue-ladda",d.default)}};"undefined"!=typeof window&&window.Vue&&window.Vue.use(o),t.default=d.default},function(n,t,a){t=n.exports=a(4)(!1),t.push([n.i,'/*!\r\n * Ladda including the default theme.\r\n */\n/*!\r\n * Ladda\r\n * http://lab.hakim.se/ladda\r\n * MIT licensed\r\n *\r\n * Copyright (C) 2016 Hakim El Hattab, http://hakim.se\r\n */\n/*************************************\r\n * CONFIG\r\n */\n/*************************************\r\n * MIXINS\r\n */\n/*************************************\r\n * BUTTON BASE\r\n */\n.ladda-button {\n  position: relative;\n}\n\n/* Spinner animation */\n.ladda-button .ladda-spinner {\n  position: absolute;\n  z-index: 2;\n  display: inline-block;\n  width: 32px;\n  top: 50%;\n  margin-top: 0;\n  opacity: 0;\n  pointer-events: none;\n}\n\n/* Button label */\n.ladda-button .ladda-label {\n  position: relative;\n  z-index: 3;\n}\n\n/* Progress bar */\n.ladda-button .ladda-progress {\n  position: absolute;\n  width: 0;\n  height: 100%;\n  left: 0;\n  top: 0;\n  background: rgba(0, 0, 0, 0.2);\n  display: none;\n  -webkit-transition: 0.1s linear all !important;\n  -moz-transition: 0.1s linear all !important;\n  -ms-transition: 0.1s linear all !important;\n  -o-transition: 0.1s linear all !important;\n  transition: 0.1s linear all !important;\n}\n.ladda-button[data-loading] .ladda-progress {\n  display: block;\n}\n\n/*************************************\r\n * EASING\r\n */\n.ladda-button,\n.ladda-button .ladda-spinner,\n.ladda-button .ladda-label {\n  -webkit-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -moz-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -ms-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  -o-transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n  transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) all !important;\n}\n.ladda-button[data-style=zoom-in],\n.ladda-button[data-style=zoom-in] .ladda-spinner,\n.ladda-button[data-style=zoom-in] .ladda-label,\n.ladda-button[data-style=zoom-out],\n.ladda-button[data-style=zoom-out] .ladda-spinner,\n.ladda-button[data-style=zoom-out] .ladda-label {\n  -webkit-transition: 0.3s ease all !important;\n  -moz-transition: 0.3s ease all !important;\n  -ms-transition: 0.3s ease all !important;\n  -o-transition: 0.3s ease all !important;\n  transition: 0.3s ease all !important;\n}\n\n/*************************************\r\n * EXPAND RIGHT\r\n */\n.ladda-button[data-style=expand-right] .ladda-spinner {\n  right: -6px;\n}\n.ladda-button[data-style=expand-right][data-size="s"] .ladda-spinner,\n.ladda-button[data-style=expand-right][data-size="xs"] .ladda-spinner {\n  right: -12px;\n}\n.ladda-button[data-style=expand-right][data-loading] {\n  padding-right: 56px;\n}\n.ladda-button[data-style=expand-right][data-loading] .ladda-spinner {\n    opacity: 1;\n}\n.ladda-button[data-style=expand-right][data-loading][data-size="s"], .ladda-button[data-style=expand-right][data-loading][data-size="xs"] {\n    padding-right: 40px;\n}\n\n/*************************************\r\n * EXPAND LEFT\r\n */\n.ladda-button[data-style=expand-left] .ladda-spinner {\n  left: 26px;\n}\n.ladda-button[data-style=expand-left][data-size="s"] .ladda-spinner,\n.ladda-button[data-style=expand-left][data-size="xs"] .ladda-spinner {\n  left: 4px;\n}\n.ladda-button[data-style=expand-left][data-loading] {\n  padding-left: 56px;\n}\n.ladda-button[data-style=expand-left][data-loading] .ladda-spinner {\n    opacity: 1;\n}\n.ladda-button[data-style=expand-left][data-loading][data-size="s"], .ladda-button[data-style=expand-left][data-loading][data-size="xs"] {\n    padding-left: 40px;\n}\n\n/*************************************\r\n * EXPAND UP\r\n */\n.ladda-button[data-style=expand-up] {\n  overflow: hidden;\n}\n.ladda-button[data-style=expand-up] .ladda-spinner {\n    top: -32px;\n    left: 50%;\n    margin-left: 0;\n}\n.ladda-button[data-style=expand-up][data-loading] {\n    padding-top: 54px;\n}\n.ladda-button[data-style=expand-up][data-loading] .ladda-spinner {\n      opacity: 1;\n      top: 26px;\n      margin-top: 0;\n}\n.ladda-button[data-style=expand-up][data-loading][data-size="s"], .ladda-button[data-style=expand-up][data-loading][data-size="xs"] {\n      padding-top: 32px;\n}\n.ladda-button[data-style=expand-up][data-loading][data-size="s"] .ladda-spinner, .ladda-button[data-style=expand-up][data-loading][data-size="xs"] .ladda-spinner {\n        top: 4px;\n}\n\n/*************************************\r\n * EXPAND DOWN\r\n */\n.ladda-button[data-style=expand-down] {\n  overflow: hidden;\n}\n.ladda-button[data-style=expand-down] .ladda-spinner {\n    top: 62px;\n    left: 50%;\n    margin-left: 0;\n}\n.ladda-button[data-style=expand-down][data-size="s"] .ladda-spinner,\n  .ladda-button[data-style=expand-down][data-size="xs"] .ladda-spinner {\n    top: 40px;\n}\n.ladda-button[data-style=expand-down][data-loading] {\n    padding-bottom: 54px;\n}\n.ladda-button[data-style=expand-down][data-loading] .ladda-spinner {\n      opacity: 1;\n}\n.ladda-button[data-style=expand-down][data-loading][data-size="s"], .ladda-button[data-style=expand-down][data-loading][data-size="xs"] {\n      padding-bottom: 32px;\n}\n\n/*************************************\r\n * SLIDE LEFT\r\n */\n.ladda-button[data-style=slide-left] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-left] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-left] .ladda-spinner {\n    left: 100%;\n    margin-left: 0;\n}\n.ladda-button[data-style=slide-left][data-loading] .ladda-label {\n    opacity: 0;\n    left: -100%;\n}\n.ladda-button[data-style=slide-left][data-loading] .ladda-spinner {\n    opacity: 1;\n    left: 50%;\n}\n\n/*************************************\r\n * SLIDE RIGHT\r\n */\n.ladda-button[data-style=slide-right] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-right] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-right] .ladda-spinner {\n    right: 100%;\n    margin-left: 0;\n    left: 16px;\n}\n[dir="rtl"] .ladda-button[data-style=slide-right] .ladda-spinner {\n      right: auto;\n}\n.ladda-button[data-style=slide-right][data-loading] .ladda-label {\n    opacity: 0;\n    left: 100%;\n}\n.ladda-button[data-style=slide-right][data-loading] .ladda-spinner {\n    opacity: 1;\n    left: 50%;\n}\n\n/*************************************\r\n * SLIDE UP\r\n */\n.ladda-button[data-style=slide-up] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-up] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-up] .ladda-spinner {\n    left: 50%;\n    margin-left: 0;\n    margin-top: 1em;\n}\n.ladda-button[data-style=slide-up][data-loading] .ladda-label {\n    opacity: 0;\n    top: -1em;\n}\n.ladda-button[data-style=slide-up][data-loading] .ladda-spinner {\n    opacity: 1;\n    margin-top: 0;\n}\n\n/*************************************\r\n * SLIDE DOWN\r\n */\n.ladda-button[data-style=slide-down] {\n  overflow: hidden;\n}\n.ladda-button[data-style=slide-down] .ladda-label {\n    position: relative;\n}\n.ladda-button[data-style=slide-down] .ladda-spinner {\n    left: 50%;\n    margin-left: 0;\n    margin-top: -2em;\n}\n.ladda-button[data-style=slide-down][data-loading] .ladda-label {\n    opacity: 0;\n    top: 1em;\n}\n.ladda-button[data-style=slide-down][data-loading] .ladda-spinner {\n    opacity: 1;\n    margin-top: 0;\n}\n\n/*************************************\r\n * ZOOM-OUT\r\n */\n.ladda-button[data-style=zoom-out] {\n  overflow: hidden;\n}\n.ladda-button[data-style=zoom-out] .ladda-spinner {\n  left: 50%;\n  margin-left: 32px;\n  -webkit-transform: scale(2.5);\n  -moz-transform: scale(2.5);\n  -ms-transform: scale(2.5);\n  -o-transform: scale(2.5);\n  transform: scale(2.5);\n}\n.ladda-button[data-style=zoom-out] .ladda-label {\n  position: relative;\n  display: inline-block;\n}\n.ladda-button[data-style=zoom-out][data-loading] .ladda-label {\n  opacity: 0;\n  -webkit-transform: scale(0.5);\n  -moz-transform: scale(0.5);\n  -ms-transform: scale(0.5);\n  -o-transform: scale(0.5);\n  transform: scale(0.5);\n}\n.ladda-button[data-style=zoom-out][data-loading] .ladda-spinner {\n  opacity: 1;\n  margin-left: 0;\n  -webkit-transform: none;\n  -moz-transform: none;\n  -ms-transform: none;\n  -o-transform: none;\n  transform: none;\n}\n\n/*************************************\r\n * ZOOM-IN\r\n */\n.ladda-button[data-style=zoom-in] {\n  overflow: hidden;\n}\n.ladda-button[data-style=zoom-in] .ladda-spinner {\n  left: 50%;\n  margin-left: -16px;\n  -webkit-transform: scale(0.2);\n  -moz-transform: scale(0.2);\n  -ms-transform: scale(0.2);\n  -o-transform: scale(0.2);\n  transform: scale(0.2);\n}\n.ladda-button[data-style=zoom-in] .ladda-label {\n  position: relative;\n  display: inline-block;\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-label {\n  opacity: 0;\n  -webkit-transform: scale(2.2);\n  -moz-transform: scale(2.2);\n  -ms-transform: scale(2.2);\n  -o-transform: scale(2.2);\n  transform: scale(2.2);\n}\n.ladda-button[data-style=zoom-in][data-loading] .ladda-spinner {\n  opacity: 1;\n  margin-left: 0;\n  -webkit-transform: none;\n  -moz-transform: none;\n  -ms-transform: none;\n  -o-transform: none;\n  transform: none;\n}\n\n/*************************************\r\n * CONTRACT\r\n */\n.ladda-button[data-style=contract] {\n  overflow: hidden;\n  width: 100px;\n}\n.ladda-button[data-style=contract] .ladda-spinner {\n  left: 50%;\n  margin-left: 0;\n}\n.ladda-button[data-style=contract][data-loading] {\n  border-radius: 50%;\n  width: 52px;\n}\n.ladda-button[data-style=contract][data-loading] .ladda-label {\n  opacity: 0;\n}\n.ladda-button[data-style=contract][data-loading] .ladda-spinner {\n  opacity: 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pointer;\n  color: #fff;\n  border-radius: 2px;\n  border: 1px solid transparent;\n  -webkit-appearance: none;\n  -webkit-font-smoothing: antialiased;\n  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);\n}\n.ladda-button:hover {\n    border-color: rgba(0, 0, 0, 0.07);\n    background-color: #888;\n}\n.ladda-button[data-color=green] {\n    background: #2aca76;\n}\n.ladda-button[data-color=green]:hover {\n      background-color: #38d683;\n}\n.ladda-button[data-color=blue] {\n    background: #53b5e6;\n}\n.ladda-button[data-color=blue]:hover {\n      background-color: #69bfe9;\n}\n.ladda-button[data-color=red] {\n    background: #ea8557;\n}\n.ladda-button[data-color=red]:hover {\n      background-color: #ed956e;\n}\n.ladda-button[data-color=purple] {\n    background: #9973C2;\n}\n.ladda-button[data-color=purple]:hover {\n      background-color: #a685ca;\n}\n.ladda-button[data-color=mint] {\n    background: #16a085;\n}\n.ladda-button[data-color=mint]:hover {\n      background-color: 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  * http://lab.hakim.se/ladda
  * MIT licensed
  *
  * Copyright (C) 2016 Hakim El Hattab, http://hakim.se
  */
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diff --git a/package-lock.json b/package-lock.json
index afb875f..d9d2cd8 100644
--- a/package-lock.json
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@@ -11,12 +11,12 @@
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-      "integrity": "sha1-w8p0NJOGSMPg2cHjKN1otiLChMo=",
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-        "fast-json-stable-stringify": "2.0.0",
-        "json-schema-traverse": "0.3.1"
+        "co": "^4.6.0",
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-        "longest": "1.0.1",
-        "repeat-string": "1.6.1"
+        "kind-of": "^3.0.2",
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+      "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-2.0.0.tgz",
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-        "readable-stream": "2.3.6"
+        "delegates": "^1.0.0",
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       "dev": true,
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-      "dev": true,
-      "requires": {
-        "arr-flatten": "1.1.0"
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+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
+      "integrity": "sha1-1kYQdP6/7HHn4VI1dhoyml3HxSA=",
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@@ -171,15 +168,15 @@
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-      "integrity": "sha1-odl8yvy8JiXMcPrc6zalDFiwGlM=",
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/array-unique/-/array-unique-0.3.2.tgz",
+      "integrity": "sha1-qJS3XUvE9s1nnvMkSp/Y9Gri1Cg=",
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-      "integrity": "sha1-8zshWfBTKj8xB6JywMz70a0peco=",
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz",
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@@ -188,7 +185,7 @@
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-        "inherits": "2.0.3",
-        "minimalistic-assert": "1.0.1"
+        "bn.js": "^4.0.0",
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@@ -261,6 +258,12 @@
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+      "resolved": "https://registry.npmjs.org/async-limiter/-/async-limiter-1.0.0.tgz",
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-      "integrity": "sha1-KWWU8nU9qmOZbSrwjRWpURbJrsM=",
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@@ -1663,7 +1694,7 @@
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-        "randombytes": "2.0.6",
-        "randomfill": "1.0.4"
+        "browserify-cipher": "^1.0.0",
+        "browserify-sign": "^4.0.0",
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+        "create-hash": "^1.1.0",
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-        "regexpu-core": "1.0.0"
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@@ -2676,7 +2775,7 @@
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@@ -2755,14 +2854,14 @@
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@@ -2771,12 +2870,12 @@
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@@ -2791,7 +2890,7 @@
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@@ -2800,7 +2899,7 @@
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@@ -2829,7 +2928,7 @@
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@@ -2866,7 +2965,7 @@
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@@ -2918,8 +3017,8 @@
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@@ -7599,7 +7564,7 @@
               "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
               "dev": true,
               "requires": {
-                "is-extendable": "0.1.1"
+                "is-extendable": "^0.1.0"
               }
             }
           }
@@ -7610,10 +7575,10 @@
           "integrity": "sha1-1USBHUKPmOsGpj3EAtJAPDKMOPc=",
           "dev": true,
           "requires": {
-            "extend-shallow": "2.0.1",
-            "is-number": "3.0.0",
-            "repeat-string": "1.6.1",
-            "to-regex-range": "2.1.1"
+            "extend-shallow": "^2.0.1",
+            "is-number": "^3.0.0",
+            "repeat-string": "^1.6.1",
+            "to-regex-range": "^2.1.0"
           },
           "dependencies": {
             "extend-shallow": {
@@ -7622,7 +7587,7 @@
               "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
               "dev": true,
               "requires": {
-                "is-extendable": "0.1.1"
+                "is-extendable": "^0.1.0"
               }
             }
           }
@@ -7633,8 +7598,8 @@
           "integrity": "sha1-nmr2KZ2NO9K9QEMIMr0RPfkGxa4=",
           "dev": true,
           "requires": {
-            "is-glob": "3.1.0",
-            "path-dirname": "1.0.2"
+            "is-glob": "^3.1.0",
+            "path-dirname": "^1.0.0"
           },
           "dependencies": {
             "is-glob": {
@@ -7643,7 +7608,7 @@
               "integrity": "sha1-e6WuJCF4BKxwcHuWkiVnSGzD6Eo=",
               "dev": true,
               "requires": {
-                "is-extglob": "2.1.1"
+                "is-extglob": "^2.1.0"
               }
             }
           }
@@ -7654,7 +7619,7 @@
           "integrity": "sha512-m5hnHTkcVsPfqx3AKlyttIPb7J+XykHvJP2B9bZDjlhLIoEq4XoK64Vg7boZlVWYK6LUY94dYPEE7Lh0ZkZKcQ==",
           "dev": true,
           "requires": {
-            "kind-of": "6.0.2"
+            "kind-of": "^6.0.0"
           }
         },
         "is-data-descriptor": {
@@ -7663,7 +7628,7 @@
           "integrity": "sha512-jbRXy1FmtAoCjQkVmIVYwuuqDFUbaOeDjmed1tOGPrsMhtJA4rD9tkgA0F1qJ3gRFRXcHYVkdeaP50Q5rE/jLQ==",
           "dev": true,
           "requires": {
-            "kind-of": "6.0.2"
+            "kind-of": "^6.0.0"
           }
         },
         "is-descriptor": {
@@ -7672,9 +7637,9 @@
           "integrity": "sha512-2eis5WqQGV7peooDyLmNEPUrps9+SXX5c9pL3xEB+4e9HnGuDa7mB7kHxHw4CbqS9k1T2hOH3miL8n8WtiYVtg==",
           "dev": true,
           "requires": {
-            "is-accessor-descriptor": "1.0.0",
-            "is-data-descriptor": "1.0.0",
-            "kind-of": "6.0.2"
+            "is-accessor-descriptor": "^1.0.0",
+            "is-data-descriptor": "^1.0.0",
+            "kind-of": "^6.0.2"
           }
         },
         "is-extglob": {
@@ -7689,7 +7654,7 @@
           "integrity": "sha1-lSHHaEXMJhCoUgPd8ICpWML/q8A=",
           "dev": true,
           "requires": {
-            "is-extglob": "2.1.1"
+            "is-extglob": "^2.1.1"
           }
         },
         "is-number": {
@@ -7698,7 +7663,7 @@
           "integrity": "sha1-JP1iAaR4LPUFYcgQJ2r8fRLXEZU=",
           "dev": true,
           "requires": {
-            "kind-of": "3.2.2"
+            "kind-of": "^3.0.2"
           },
           "dependencies": {
             "kind-of": {
@@ -7707,7 +7672,7 @@
               "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
               "dev": true,
               "requires": {
-                "is-buffer": "1.1.6"
+                "is-buffer": "^1.1.5"
               }
             }
           }
@@ -7730,19 +7695,19 @@
           "integrity": "sha512-MWikgl9n9M3w+bpsY3He8L+w9eF9338xRl8IAO5viDizwSzziFEyUzo2xrrloB64ADbTf8uA8vRqqttDTOmccg==",
           "dev": true,
           "requires": {
-            "arr-diff": "4.0.0",
-            "array-unique": "0.3.2",
-            "braces": "2.3.2",
-            "define-property": "2.0.2",
-            "extend-shallow": "3.0.2",
-            "extglob": "2.0.4",
-            "fragment-cache": "0.2.1",
-            "kind-of": "6.0.2",
-            "nanomatch": "1.2.13",
-            "object.pick": "1.3.0",
-            "regex-not": "1.0.2",
-            "snapdragon": "0.8.2",
-            "to-regex": "3.0.2"
+            "arr-diff": "^4.0.0",
+            "array-unique": "^0.3.2",
+            "braces": "^2.3.1",
+            "define-property": "^2.0.2",
+            "extend-shallow": "^3.0.2",
+            "extglob": "^2.0.4",
+            "fragment-cache": "^0.2.1",
+            "kind-of": "^6.0.2",
+            "nanomatch": "^1.2.9",
+            "object.pick": "^1.3.0",
+            "regex-not": "^1.0.0",
+            "snapdragon": "^0.8.1",
+            "to-regex": "^3.0.2"
           }
         }
       }
@@ -7753,27 +7718,27 @@
       "integrity": "sha512-MjAA0ZqO1ba7ZQJRnoCdbM56mmFpipOPUv/vQpwwfSI42p5PVDdoiuK2AL2FwFUVgT859Jr43bFZXRg/LNsqvg==",
       "dev": true,
       "requires": {
-        "acorn": "5.7.1",
-        "acorn-dynamic-import": "2.0.2",
-        "ajv": "4.11.8",
-        "ajv-keywords": "1.5.1",
-        "async": "2.6.1",
-        "enhanced-resolve": "3.4.1",
-        "interpret": "1.1.0",
-        "json-loader": "0.5.7",
-        "json5": "0.5.1",
-        "loader-runner": "2.3.0",
-        "loader-utils": "0.2.17",
-        "memory-fs": "0.4.1",
-        "mkdirp": "0.5.1",
-        "node-libs-browser": "2.1.0",
-        "source-map": "0.5.7",
-        "supports-color": "3.2.3",
-        "tapable": "0.2.8",
-        "uglify-js": "2.8.29",
-        "watchpack": "1.6.0",
-        "webpack-sources": "1.1.0",
-        "yargs": "6.6.0"
+        "acorn": "^5.0.0",
+        "acorn-dynamic-import": "^2.0.0",
+        "ajv": "^4.7.0",
+        "ajv-keywords": "^1.1.1",
+        "async": "^2.1.2",
+        "enhanced-resolve": "^3.3.0",
+        "interpret": "^1.0.0",
+        "json-loader": "^0.5.4",
+        "json5": "^0.5.1",
+        "loader-runner": "^2.3.0",
+        "loader-utils": "^0.2.16",
+        "memory-fs": "~0.4.1",
+        "mkdirp": "~0.5.0",
+        "node-libs-browser": "^2.0.0",
+        "source-map": "^0.5.3",
+        "supports-color": "^3.1.0",
+        "tapable": "~0.2.5",
+        "uglify-js": "^2.8.27",
+        "watchpack": "^1.3.1",
+        "webpack-sources": "^1.0.1",
+        "yargs": "^6.0.0"
       },
       "dependencies": {
         "ajv": {
@@ -7782,8 +7747,8 @@
           "integrity": "sha1-gv+wKynmYq5TvcIK8VlHcGc5xTY=",
           "dev": true,
           "requires": {
-            "co": "4.6.0",
-            "json-stable-stringify": "1.0.1"
+            "co": "^4.6.0",
+            "json-stable-stringify": "^1.0.1"
           }
         },
         "camelcase": {
@@ -7798,10 +7763,10 @@
           "integrity": "sha1-+G5jdNQyBabmxg6RlvF8Apm/s0g=",
           "dev": true,
           "requires": {
-            "big.js": "3.2.0",
-            "emojis-list": "2.1.0",
-            "json5": "0.5.1",
-            "object-assign": "4.1.1"
+            "big.js": "^3.1.3",
+            "emojis-list": "^2.0.0",
+            "json5": "^0.5.0",
+            "object-assign": "^4.0.1"
           }
         },
         "supports-color": {
@@ -7810,7 +7775,7 @@
           "integrity": "sha1-ZawFBLOVQXHYpklGsq48u4pfVPY=",
           "dev": true,
           "requires": {
-            "has-flag": "1.0.0"
+            "has-flag": "^1.0.0"
           }
         },
         "yargs": {
@@ -7819,19 +7784,19 @@
           "integrity": "sha1-eC7CHvQDNF+DCoCMo9UTr1YGUgg=",
           "dev": true,
           "requires": {
-            "camelcase": "3.0.0",
-            "cliui": "3.2.0",
-            "decamelize": "1.2.0",
-            "get-caller-file": "1.0.3",
-            "os-locale": "1.4.0",
-            "read-pkg-up": "1.0.1",
-            "require-directory": "2.1.1",
-            "require-main-filename": "1.0.1",
-            "set-blocking": "2.0.0",
-            "string-width": "1.0.2",
-            "which-module": "1.0.0",
-            "y18n": "3.2.1",
-            "yargs-parser": "4.2.1"
+            "camelcase": "^3.0.0",
+            "cliui": "^3.2.0",
+            "decamelize": "^1.1.1",
+            "get-caller-file": "^1.0.1",
+            "os-locale": "^1.4.0",
+            "read-pkg-up": "^1.0.1",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^1.0.1",
+            "set-blocking": "^2.0.0",
+            "string-width": "^1.0.2",
+            "which-module": "^1.0.0",
+            "y18n": "^3.2.1",
+            "yargs-parser": "^4.2.0"
           }
         },
         "yargs-parser": {
@@ -7840,7 +7805,7 @@
           "integrity": "sha1-KczqwNxPA8bIe0qfIX3RjJ90hxw=",
           "dev": true,
           "requires": {
-            "camelcase": "3.0.0"
+            "camelcase": "^3.0.0"
           }
         }
       }
@@ -7851,11 +7816,11 @@
       "integrity": "sha512-FCrqPy1yy/sN6U/SaEZcHKRXGlqU0DUaEBL45jkUYoB8foVb6wCnbIJ1HKIx+qUFTW+3JpVcCJCxZ8VATL4e+A==",
       "dev": true,
       "requires": {
-        "memory-fs": "0.4.1",
-        "mime": "1.6.0",
-        "path-is-absolute": "1.0.1",
-        "range-parser": "1.2.0",
-        "time-stamp": "2.0.1"
+        "memory-fs": "~0.4.1",
+        "mime": "^1.5.0",
+        "path-is-absolute": "^1.0.0",
+        "range-parser": "^1.0.3",
+        "time-stamp": "^2.0.0"
       }
     },
     "webpack-merge": {
@@ -7864,7 +7829,7 @@
       "integrity": "sha512-TmSe1HZKeOPey3oy1Ov2iS3guIZjWvMT2BBJDzzT5jScHTjVC3mpjJofgueEzaEd6ibhxRDD6MIblDr8tzh8iQ==",
       "dev": true,
       "requires": {
-        "lodash": "4.17.10"
+        "lodash": "^4.17.5"
       }
     },
     "webpack-sources": {
@@ -7873,8 +7838,8 @@
       "integrity": "sha512-aqYp18kPphgoO5c/+NaUvEeACtZjMESmDChuD3NBciVpah3XpMEU9VAAtIaB1BsfJWWTSdv8Vv1m3T0aRk2dUw==",
       "dev": true,
       "requires": {
-        "source-list-map": "2.0.0",
-        "source-map": "0.6.1"
+        "source-list-map": "^2.0.0",
+        "source-map": "~0.6.1"
       },
       "dependencies": {
         "source-map": {
@@ -7897,7 +7862,7 @@
       "integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
       "dev": true,
       "requires": {
-        "isexe": "2.0.0"
+        "isexe": "^2.0.0"
       }
     },
     "which-module": {
@@ -7912,7 +7877,7 @@
       "integrity": "sha512-QGkOQc8XL6Bt5PwnsExKBPuMKBxnGxWWW3fU55Xt4feHozMUhdUMaBCk290qpm/wG5u/RSKzwdAC4i51YigihA==",
       "dev": true,
       "requires": {
-        "string-width": "1.0.2"
+        "string-width": "^1.0.2 || 2"
       }
     },
     "window-size": {
@@ -7933,8 +7898,8 @@
       "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
       "dev": true,
       "requires": {
-        "string-width": "1.0.2",
-        "strip-ansi": "3.0.1"
+        "string-width": "^1.0.1",
+        "strip-ansi": "^3.0.1"
       }
     },
     "wrappy": {
@@ -7944,25 +7909,20 @@
       "dev": true
     },
     "ws": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-1.1.2.tgz",
-      "integrity": "sha1-iiRPoFJAHgjJiGz0SoUYnh/UBn8=",
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
+      "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
       "dev": true,
       "requires": {
-        "options": "0.0.6",
-        "ultron": "1.0.2"
+        "async-limiter": "~1.0.0",
+        "safe-buffer": "~5.1.0",
+        "ultron": "~1.1.0"
       }
     },
-    "wtf-8": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/wtf-8/-/wtf-8-1.0.0.tgz",
-      "integrity": "sha1-OS2LotDxw00e4tYw8V0O+2jhBIo=",
-      "dev": true
-    },
     "xmlhttprequest-ssl": {
-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.3.tgz",
-      "integrity": "sha1-GFqIjATspGw+QHDZn3tJ3jUomS0=",
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=",
       "dev": true
     },
     "xtend": {
@@ -7989,19 +7949,19 @@
       "integrity": "sha1-a6MY6xaWFyf10oT46gA+jWFU0Mg=",
       "dev": true,
       "requires": {
-        "camelcase": "3.0.0",
-        "cliui": "3.2.0",
-        "decamelize": "1.2.0",
-        "get-caller-file": "1.0.3",
-        "os-locale": "1.4.0",
-        "read-pkg-up": "1.0.1",
-        "require-directory": "2.1.1",
-        "require-main-filename": "1.0.1",
-        "set-blocking": "2.0.0",
-        "string-width": "1.0.2",
-        "which-module": "1.0.0",
-        "y18n": "3.2.1",
-        "yargs-parser": "5.0.0"
+        "camelcase": "^3.0.0",
+        "cliui": "^3.2.0",
+        "decamelize": "^1.1.1",
+        "get-caller-file": "^1.0.1",
+        "os-locale": "^1.4.0",
+        "read-pkg-up": "^1.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^1.0.1",
+        "set-blocking": "^2.0.0",
+        "string-width": "^1.0.2",
+        "which-module": "^1.0.0",
+        "y18n": "^3.2.1",
+        "yargs-parser": "^5.0.0"
       },
       "dependencies": {
         "camelcase": {
@@ -8018,7 +7978,7 @@
       "integrity": "sha1-J17PDX/+Bcd+ZOfIbkzZS/DhIoo=",
       "dev": true,
       "requires": {
-        "camelcase": "3.0.0"
+        "camelcase": "^3.0.0"
       },
       "dependencies": {
         "camelcase": {
diff --git a/package.json b/package.json
index 1ffa861..0a46596 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
     "babel-preset-env": "^1.4.0",
     "css-loader": "^0.28.0",
     "jasmine-core": "^2.6.1",
-    "karma": "^1.6.0",
+    "karma": "^3.0.0",
     "karma-chrome-launcher": "^2.0.0",
     "karma-jasmine": "^0.1.6",
     "karma-spec-reporter": "0.0.31",
diff --git a/test.js b/test.js
index 52d1414..c3bbf4b 100644
--- a/test.js
+++ b/test.js
@@ -13,7 +13,7 @@ describe('VueLadda', () => {
 
   it('sets the correct default data', () => {
     const vm = new Ctor().$mount();
-    expect(vm.buttonClass).toBe('ladda-class');
+    expect(vm.buttonClass).toBe('ladda-button');
     expect(vm.dataStyle).toBe('expand-left');
     expect(vm.progress).toBe(0);
   });