Как связать JavaScript с HTML и CSS
# Javascript
<script src="[file_name].js"></script>
# CSS
<link rel = "stylesheet" type="text/css" href = "style.css" />
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# Javascript
<script src="[file_name].js"></script>
# CSS
<link rel = "stylesheet" type="text/css" href = "style.css" /><script type="text/javascript" src="path-to-javascript-file.js"></script>