Say if I want to create a custom element using shadow dom. Some elements in the template have class names specified in the linked css file. Now I want to let the css rules have effects on the elements. But I can't achieve that because of the shadow dom style boundary.
<link rel="stylesheet" type="text/css"
href="https://maxcdn.bootstrapcdn.com/font-awesome/4.5.0/css/font-awesome.min.css">
<template id="blog-header">
<header>
<h1>DreamLine</h1>
<nav>
<ul>
<li><a href="#0">Tour</a></li>
<li><a href="#0">Blog</a></li>
<li><a href="#0">Contact</a></li>
<li><a href="#0">Error</a></li>
<li><a href="#0"><i class="fa fa-search"></i>Search</a></li>
</ul>
</nav>
</header>
</template>
<script type="text/javascript">
var importDoc = document.currentScript.ownerDocument;
var proto = Object.create(HTMLElement.prototype, {
createdCallback: {
value: function () {
var t = importDoc.querySelector("#blog-header");
var clone = document.importNode(t.content, true);
this.createShadowRoot().appendChild(clone);
}
}
});
document.registerElement("blog-header", {
prototype: proto
});
</script>You see, fa-search is a class defined in the font-awesome css file, how can I style the <i> element?