我尝试使用ShadowDOM v1(没有聚合物或其他网络组件),但我无法使用样式与polyfill一起使用。
特殊:host
和::slotted
CSS选择器不起作用。
我已尝试使用various polyfills,但TBH,我有点迷失了。我见过this question,但它使用的是自定义元素和模板。我的情景是没有这些。
有人可以帮我在Firefox或Edge中使用此代码吗? - 具体来说,你应该看到三种颜色:蓝色,红色和黄色,但只有红色。
const shadowHtml =
`<style>
:host {
background: yellow;
}
.inside {
background: red;
margin: 10px;
}
::slotted(div[slot="content"]) {
background: blue;
color: white;
}
</style>
<div>
<p>i am yellow</p>
<div class=inside>i am red</div>
<slot name="content"></slot>
</div>`;
const root = document.querySelector('#root');
const shadow = root.attachShadow({ mode: 'open' });
shadow.innerHTML = shadowHtml;
&#13;
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Shadow DOM v1 Test</title>
<script src="https://rawgit.com/webcomponents/webcomponentsjs/v1/webcomponents-lite.js"></script>
</head>
<body>
<div id=root>
<div slot="content">
<p>I am blue</p>
</div>
</div>
</body>
</html>
&#13;
答案 0 :(得分:2)
webcomponents-lite.js &#34; v1&#34;现在嵌入一个Shadow DOM v1 polyfill:
attachShadow()
:host
和::slotted()
的{{3}}对象。请注意,要使用它,您必须将模板字符串放在<template>
元素中才能调用ShadyCSS.prepareTemplate()
const makeTemplate = function (strings) {
const template = document.createElement('template');
template.innerHTML = strings[0];
return template;
}
const shadowHtml =
makeTemplate`<style>
:host {
background: yellow;
}
.inside {
background: red;
margin: 10px;
}
::slotted(div[slot="content"]) {
background: blue;
color: white;
}
</style>
<div>
<p>i am yellow</p>
<div class=inside>i am red</div>
<slot name="content"></slot>
</div>`
ShadyCSS.prepareTemplate(shadowHtml, 'div');
const root = document.querySelector('#root');
const shadow = root.attachShadow({ mode: 'open' });
shadow.innerHTML = shadowHtml.innerHTML;
&#13;
<script src="https://cdn.rawgit.com/webcomponents/shadydom/master/shadydom.min.js"></script>
<script src="https://cdn.rawgit.com/webcomponents/shadycss/master/scoping-shim.min.js"></script>
<div id=root>
<div slot="content">
<p>I am blue</p>
</div>
</div>
&#13;