play.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link
      rel="shortcut icon"
      type="image/png"
      href="http://jsonlogic.com/images/favicon.png?v=1445437254"
    />
    <title>JsonLogic Browser Test</title>
    <link
      rel="stylesheet"
      href="https://cdn.jsdelivr.net/npm/bootstrap@5/dist/css/bootstrap.min.css"
      integrity="sha256-PI8n5gCcz9cQqQXm3PEtDuPG8qx9oFsFctPg0S5zb8g="
      crossorigin="anonymous"
    />
    <style>
      :root {
        --jl-blue: #337ab7;
        --jl-blue-dim: #22699e;
      }
      .btn-primary {
        --bs-btn-bg: var(--jl-blue);
        --bs-btn-border-color: var(--jl-blue);
        --bs-btn-hover-bg: var(--jl-blue-dim);
        --bs-btn-hover-border-color: var(--jl-blue-dim);
      }
      header {
        background-color: var(--jl-blue);
        color: white;
        padding: 1rem;
        margin-bottom: 1rem;
      }
      .flex {
        display: flex;
        justify-content: space-between;
      }
      #rule,
      #data,
      pre {
        height: 300px;
        margin: 0 0 1rem;
        border: 1px solid #dcdcdc;
        border-radius: 0.25rem;
      }
      pre {
        padding: 0.5rem;
        background-color: #f1f1f1;
      }
      textarea {
        font-family: 'Courier New', Courier, monospace;
      }
    </style>
  </head>
  <body>
    <header>
      <div class="container flex">
        <h2>JsonLogic Browser Test</h2>
        <img
          src="http://jsonlogic.com/images/jsonlogic-white.png"
          style="height: 50px"
        />
      </div>
    </header>

    <div class="container">
      <div class="row">
        <div class="col-md-4">
          <div class="form-group">
            <label for="rule"><h6>Rule</h6></label>
            <textarea required class="form-control" id="rule">{}</textarea>
            <div class="alert" id="message-rule" style="display: none"></div>
          </div>
        </div>
        <div class="col-md-4">
          <div class="form-group">
            <label for="rule"><h6>Data</h6></label>
            <textarea class="form-control" id="data"></textarea>
            <div class="alert" id="message-data" style="display: none"></div>
          </div>
        </div>
        <div class="col-md-4">
          <div class="form-group">
            <label for="rule"><h6>Output</h6></label>
            <pre id="output"><code></code></pre>
            <div class="btn btn-primary" id="compute">Compute</div>
            <div
              class="alert alert-danger"
              id="message-compute"
              style="display: none"
            ></div>
          </div>
        </div>
      </div>
    </div>
    <script type="module">
      import $ from "https://cdn.jsdelivr.net/npm/jquery@3/+esm";
      import jsonLogic from "./dist/json-logic.js";

      /**
       * Lints the text in the element with the given id.
       * @param {string} elementId
       * @returns {boolean}
       */
      const lint = (elementId) => {
        const $element = $(elementId);
        const val = $element.val();
        const $message = $("#message-" + $element.attr("id"));

        if (val === "") {
          if ($element.attr("required")) {
            $message
              .removeClass("alert-success")
              .addClass("alert-danger")
              .text("Can't be blank")
              .fadeIn();
            return false;
          } else {
            $message
              .removeClass("alert-danger")
              .addClass("alert-success")
              .text("OK (null)")
              .fadeIn();
            return true;
          }
        }

        try {
          JSON.parse(val);
          $message
            .removeClass("alert-danger")
            .addClass("alert-success")
            .text("OK")
            .fadeIn();
          return true;
        } catch (e) {
          $message
            .removeClass("alert-success")
            .addClass("alert-danger")
            .text(e.message)
            .fadeIn();
          return false;
        }
      };

      /** Applies the rule if both the rule and data are valid. */
      const compute = () => {
        if (lint("#rule") && lint("#data")) {
          const rule = JSON.parse($("#rule").val());
          const data =
            $("#data").val() === "" ? null : JSON.parse($("#data").val());
          try {
            const output = jsonLogic.apply(rule, data);
            console.log(output);
            $("#message-compute").fadeOut();
            $("#output>code").text(JSON.stringify(output, null, 2));
          } catch (e) {
            $("#output>code").text("");
            $("#message-compute").text(e.message).fadeIn();
          }
        }
        // else: They make their own noise.
      };

      /** Lints the text in the rule textarea after a neglightible delay. */
      const lintRule = () => setTimeout(() => lint("#rule"));
      /** Lints the text in the data textarea after a neglightible delay. */
      const lintData = () => setTimeout(() => lint("#data"));

      // Add event listeners
      $("#rule").keyup(lintRule);
      $("#data").keyup(lintData);
      $("#compute").click(compute);

      // On page load
      $(lintRule);
      $(lintData);
    </script>
  </body>
</html>