Jak połączyć JS i plik HTML w VSCode

<!DOCTYPE html>
    <html>
    <head>
    
    <link rel="stylesheet" href="css.css" type="text/css">
    </head>
    <body>
    <p id="firstParagraph">Hello world!</p>    
    <script src='js.js'></script>
    </body>
    </html>
 Run code snippet
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