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<!DOCTYPE HTML>
<html>
<head>
<script>
function tweak() {
// div with style "border: 10px solid green"
var shadowDiv = document.createElement("div");
shadowDiv.style.border = "10px solid green";
// Insertion point will match nothing and use fallback content.
var insertionPoint = document.createElement("content");
shadowDiv.appendChild(insertionPoint);
// Append three nodes as children to use as fallback content.
insertionPoint.innerHTML = '<span style="background-color: orange">Hello</span> <span style="background-color: green">World</span>';
var shadowRoot = document.getElementById('outer').createShadowRoot();
shadowRoot.appendChild(shadowDiv);
}
</script>
</head>
<body onload="tweak()">
<div id="outer"></div>
</body>
</html>
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