html-import
/
test.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=1.0">
    <title>测试rel="import"的能力</title>
    <style>[is="ui-import"] {
        display: block;
    }
    button {
        width: 150px; height: 40px;
        font-size: 100%;
    }</style>
</head>
<body>
    <p>需要使用http(s)协议访问本页面。</p>
    <h3>基本功能测试</h3>

    <p>下面应该显示一段列表：</p>
    <link rel="import" href="./include/_section.html" is="ui-import">

    <h3>load事件测试</h3>
    <p>下面列表边框颜色应该是红色。</p>
    <link rel="import" id="link1" href="./include/_section.html" is="ui-import">

    <h3>出错提示</h3>
    <p>不存在的地址，error事件</p>
    <link rel="import" id="link2" href="./include/_whatever.html" is="ui-import">

    <h3>动态加载测试</h3>
    <p>按照提示进行测试。</p>
    <ol>
        <li>点击下面的按钮，预期显示一段列表；</li>
        <li>刷新页面，打开Chrome控制台，设置offline，再点击按钮，预期显示网络异常。</li>
    </ol>
    <p>
        <button id="b1">设置href属性</button>
    </p>
    <link rel="import" id="link3" is="ui-import">

    <p>下面按钮点击后直接append一段 &lt;link&gt; html代码</p>
    <p>
        <button id="b2">插入&lt;link&gt;元素</button>
    </p>

    <script src="./safari-polyfill.js"></script>
    <script src="./html-import.js"></script>

    <script>
        link1.addEventListener('load', function () {
            this.querySelector('section').style.borderColor = 'red';
        });
        link2.addEventListener('error', function (event) {
            this.textContent = event.detail.error + '：' + event.detail.response.statusText;
        });
        b1.addEventListener('click', function () {
            link3.href = link1.href;
        });
        link3.addEventListener('error', function (event) {
            this.textContent =  '加载出错：' + event.detail.error;
        });
        b2.addEventListener('click', function () {
            this.parentElement.insertAdjacentHTML('afterend', '<link rel="import" href="./include/_section.html" is="ui-import">');
        });
    </script>
</body>
</html>