pkg/nnbd_migration/lib/src/front_end/resources/index.html

<html>
<head>
    <title>Null Safety Preview</title>
    <script src="{{ highlightJsPath }}"></script>
    <script>{{ dartPageScript }}</script>
    <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:400,600&display=swap">
    <link rel="stylesheet" href="{{ highlightStylePath }}">
    <style>{{ dartPageStyle }}</style>
    <link rel="shortcut icon" href="/dart_192.png">
</head>
<body class="{{ migrationAppliedStyle }} {{ needsRerunStyle }}">
<div class="rerunning-pane">
  <h1>Rerunning...</h1>
</div>
<div class="popup-pane">
  <div class="close button">X</div>
  <h2></h2><!-- header placeholder element -->
  <p></p><!-- subheader placeholder element -->
  <pre></pre><!-- preformated content placeholder element -->
  <a class="button bottom" target="_blank">File on GitHub</a><!-- post to github placeholder element -->
</div>
<p class="root">{{ root }}</p>
<header class="elevation-z4">
    <img src="{{ dartLogoPath }}" alt="DartPad Logo" class="logo"/>
    <h1>Dart</h1>
    <h2 class="before-apply">Proposed null safety changes</h2>
    <h2 class="after-apply">&#10003; Null safety migration applied</h2>
    <a target="_blank"
       href="https://dart.dev/go/null-safety-migration">
      <button class="action-button">
        <i class="material-icons">launch</i>
        <span>Help</span>
      </button>
    </a>
    <button class="action-button apply-migration">
        <i class="material-icons">edit</i>
        <span class="label">
          Apply Migration
        </span>
    </button>
    <button class="action-button apply-migration" disabled>
        <i class="material-icons">edit</i>
        <span class="label">
          Apply Migration
        </span>
    </button>
    <button class="action-button rerun-migration before-apply">
      <span class="optional">
        <i class="material-icons">replay</i>
        Rerun From Sources
      </span>
      <span class="required">
        <i class="material-icons">warning</i>
        Rerun With Changes
      </span>
    </button>
</header>
<div class="panels horizontal">
    <div class="nav-panel">
        <div class="nav-inner">
            <div class="panel-heading">Project Files</div>
            <div class="nav-tree"></div>
        </div><!-- /nav-inner -->
    </div><!-- /nav -->
    <div class="file">
        <div class="title-bar">
            <h3 id="unit-name">&nbsp;</h3>
            <span id="migrate-unit-status-icon-label">Migrate
                <span
                    class="material-icons status-icon migrating"
                    id="migrate-unit-status-icon">check_box</span>
            </span>
        </div>
        <div class="content">
            <div class="regions">
                <!-- The regions overlay code copy of the content to provide -->
                <!-- tooltips for modified regions. -->
            </div><!-- /regions -->
            <div class="code">
                <!-- Compilation unit content is written here. -->
                <p class="welcome">
                    Select a source file on the left to preview the proposed edits.
                </p>
            </div>
        </div>
    </div><!-- /content -->
    <div class="info-panel">
        <div class="edit-list">
            <div class="panel-heading">Proposed Edits</div>
            <div class="panel-content"></div>
        </div><!-- /edit-list -->
        <div class="edit-panel">
            <div class="panel-heading">Edit Details</div>
            <div class="panel-content">
                <p class="placeholder">See details about a proposed edit.</p>
            </div><!-- /panel-content -->
        </div><!-- /edit-panel -->
    </div><!-- /info-panel -->
</div><!-- /panels -->
<footer>
  <button class="report-problem">Send Feedback</button>
    <span class="wide"> </span>
    <div class="sdk-version">Based on <span id="sdk-version">{{ sdkVersion }}</span></div>
</footer>
</body>
</html>