examples/template.html

<!doctype html>
<html lang="en-us">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <title>@project_name@ Example: @category_name@/@example_name@</title>
    <style>
      html, body {
        width: 100vw;
        height: 100vh;
        overflow: hidden;
        font-family: 'Liberation Sans', sans-serif;
      }

      .canvas-container {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;

        display: flex;
        align-items: center;
        justify-content: center;

        background: black;
      }

      #canvas {
        box-shadow: 0 0 0.5rem #7787;
      }

      #output-container {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        bottom: 0;

        background-color: black;
        border: none;
        border-top: 1px solid #778;
        margin: 0;
        padding: 1rem;

        transition: top 0.25s;
      }

      #output-container::before {
        position: absolute;
        bottom: 100%;
        right: 1rem;

        content: 'Console';
        font-size: 1.5rem;
        color: white;
        background: black;
        border: 1px solid #778;
        border-bottom: none;
        padding: 0.75rem 1.5rem;
        border-radius: 0.5rem 0.5rem 0 0;
      }

      #output-container:hover,
      #output-container:focus-within {
        top: 50%;
      }

      #output-container:focus-within {
        border-top: 2px solid orange;
      }

      #output-container:focus-within::before {
        border: 2px solid orange;
        border-bottom: none;
      }

      #output {
        width: 100%;
        height: 100%;
        padding: 0;
        margin: 0;

        border: none;
        background: black;
        color: white;
        outline: none;
        resize: none;

        font-family: 'Lucida Console', Monaco, monospace;
      }

      #source-code {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        bottom: 0;

        background: #e0eaee;
        padding: 1rem;

        transition: top 0.25s;
      }

      #source-code::before {
        position: absolute;
        bottom: 100%;
        left: 1rem;

        content: 'Source code';
        font-size: 1.5rem;
        background: linear-gradient(to bottom, #789, #e0eaee);
        padding: 0.75rem 1.5rem;
        border-radius: 0.5rem 0.5rem 0 0;
      }

      #source-code:hover,
      #source-code:focus-within {
        top: 50%;
      }

      #source-code:focus-within {
        border-top: 2px solid orange;
      }

      #source-code:focus-within::before {
        border: 2px solid orange;
        border-bottom: none;
      }

      #source-code-contents {
        height: 100%;
        overflow: scroll;
      }

      #example-description {
        color: white;
        text-align: center;
        position: relative; /* required for proper positioning */
      }
    </style>
    <link rel="stylesheet" type="text/css" href="highlight.css">
  </head>
  <body>
    <div class="canvas-container">
      <canvas id="canvas" oncontextmenu="event.preventDefault()" tabindex="-1"></canvas>
    </div>
    <div id="example-description">
      @description@
    </div>
    <div id="output-container">
      <textarea id="output" rows="8" spellcheck="false" readonly></textarea>
    </div>

    <div id="source-code" tabindex="1">
      <div id="source-code-contents">@htmlified_source_code@</div>
    </div>

    <script type='text/javascript'>
      var Module = {
        preRun: [],
        postRun: [],
        print: (function() {
          var element = document.getElementById('output');
          if (element) element.value = ''; // clear browser cache
          return function(text) {
            var elem = document.getElementById('output-container');
            if (elem.style['top'] == '') {
                elem.style['top'] = '50%';
                setTimeout(function() { elem.style['top'] = ''; }, 3000);
            }

            if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
            // These replacements are necessary if you render to raw HTML
            //text = text.replace(/&/g, "&amp;");
            //text = text.replace(/</g, "&lt;");
            //text = text.replace(/>/g, "&gt;");
            //text = text.replace('\n', '<br>', 'g');
            console.log(text);
            if (element) {
              element.value += text + "\n";
              element.scrollTop = element.scrollHeight; // focus on bottom
            }
          };
        })(),
        printErr: function(text) { Module.print(text) },
        canvas: (() => {
          var canvas = document.getElementById('canvas');

          // As a default initial behavior, pop up an alert when webgl context is lost. To make your
          // application robust, you may want to override this behavior before shipping!
          // See http://www.khronos.org/registry/webgl/specs/latest/1.0/#5.15.2
          canvas.addEventListener("webglcontextlost", (e) => { alert('WebGL context lost. You will need to reload the page.'); e.preventDefault(); }, false);

          return canvas;
        })(),
        setStatus: (text) => {},
        totalDependencies: 0,
        monitorRunDependencies: (left) => {
          this.totalDependencies = Math.max(this.totalDependencies, left);
          Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
        }
      };
      Module.setStatus('Downloading...');
      window.onerror = (event) => {
        // TODO: do not warn on ok events like simulating an infinite loop or exitStatus
        Module.setStatus('Exception thrown, see JavaScript console');
        Module.setStatus = (text) => {
          if (text) console.error('[post-exception status] ' + text);
        };
      };
    </script>
    <script async type="text/javascript" src="@javascript_file@"></script>
  </body>
</html>