WIP: Replace remaining hard-coded strings with fully-qualified enum refs

Author: acdvorak

packages/mdc-checkbox/index.js

@@ -21,7 +21,7 @@
  * THE SOFTWARE.
  */
 
-import {getCorrectEventName} from '@material/animation/index.ts';
+import {StandardJsEventType, getCorrectEventName} from '@material/animation/index.ts';
 import MDCComponent from '@material/base/component';
 /* eslint-disable no-unused-vars */
 import {MDCSelectionControlState, MDCSelectionControl} from '@material/selection-control/index';
@@ -33,6 +33,8 @@ import {getMatchesProperty} from '@material/ripple/util';
 /** @const {!Array<string>} */
 const CB_PROTO_PROPS = ['checked', 'indeterminate'];
 
+const {ANIMATION_END} = StandardJsEventType;
+
 /**
  * @extends MDCComponent<!MDCCheckboxFoundation>
  * @implements {MDCSelectionControl}
@@ -69,7 +71,7 @@ class MDCCheckbox extends MDCComponent {
     this.handleChange_ = () => this.foundation_.handleChange();
     this.handleAnimationEnd_= () => this.foundation_.handleAnimationEnd();
     this.nativeCb_.addEventListener('change', this.handleChange_);
-    this.listen(getCorrectEventName(window, 'animationend'), this.handleAnimationEnd_);
+    this.listen(getCorrectEventName(window, ANIMATION_END), this.handleAnimationEnd_);
     this.installPropertyChangeHooks_();
   }
 
@@ -191,7 +193,7 @@ class MDCCheckbox extends MDCComponent {
   destroy() {
     this.ripple_.destroy();
     this.nativeCb_.removeEventListener('change', this.handleChange_);
-    this.unlisten(getCorrectEventName(window, 'animationend'), this.handleAnimationEnd_);
+    this.unlisten(getCorrectEventName(window, ANIMATION_END), this.handleAnimationEnd_);
     this.uninstallPropertyChangeHooks_();
     super.destroy();
   }

test/unit/mdc-slider/foundation-pointer-events.test.js

@@ -24,14 +24,14 @@
 import {assert} from 'chai';
 import td from 'testdouble';
 
-import {getCorrectEventName} from '../../../packages/mdc-animation/index.ts';
+import {StandardJsEventType, getCorrectEventName} from '../../../packages/mdc-animation/index.ts';
 
 import {cssClasses} from '../../../packages/mdc-slider/constants';
 import {TRANSFORM_PROP, setupEventTest as setupTest} from './helpers';
 
 suite('MDCSliderFoundation - pointer events');
 
-const TRANSITION_END_EVT = getCorrectEventName(window, 'transitionend');
+const TRANSITION_END_EVT = getCorrectEventName(window, StandardJsEventType.TRANSITION_END);
 
 createTestSuiteForPointerEvents('mousedown', 'mousemove', 'mouseup');
 createTestSuiteForPointerEvents('pointerdown', 'pointermove', 'pointerup');