我一直在尝试HTML5和SVG; 我对JavaScript和Web开发都很陌生,所以我可能会缺少一些东西.我正在尝试创建可重用的Web组件,利用一些新功能,如HTML Imports,Shadow DOM和扩展现有的Web元素.我有两个html文件:
<html>
<head>
<title>Test HTML5</title>
</head>
<body>
<link rel="import" href="Elements/tank.html">
<svg width="100%"
viewBox="0 0 500 500"
style="border: solid; border-width: thin; stroke-width: 2;">
<polyline points="0,300 100,300 100,100 250,100 250,150 500,150"
style="fill:none;stroke:black;stroke-width:3"
onclick="window.alert('you clicked line')" />
<svg is="my-tank" x="200" y="350" width="50" height="50"></svg>
</svg>
</body>
</html>
<html>
<body>
<template id="tank">
<rect fill="red" width="50" height="50"></rect>
</template>
<script type="text/javascript">
var tankElement = document.currentScript.ownerDocument.querySelector('#tank');
document.registerElement('my-tank', {
prototype: Object.create(SVGSVGElement.prototype, {
createdCallback: {
value: function () {
var root = this.createShadowRoot();
//Works
root.innerHTML …