Say you have an external stylesheet (<link>), followed by a <script>. Is the external stylesheet always applied before the <script> executes, so that getComputedStyle always respects the external stylesheet's rules?
Or are browsers allowed to run JavaScript before earlier stylesheets have been applied?
Example:
<!doctype html>
<html>
<head>
<link href="/my-stylesheet.css" rel="stylesheet" />
</head>
<body>
<div id="foo"></div>
<script>
window.getComputedStyle(document.getElementById('foo')).width
// => "200px" due to stylesheet - is this reliable?
</script>
</body>
</html>
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