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HTML DOMTokenList entries()
tryjsref_domtokenlist
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<!DOCTYPE html> <html> <body> <h1>The DOMTokenList Object</h1> <p>The class tokens in "demo" are:</p> <p id="demo" class="c1 c2 c3"></p> <script> let list = document.getElementById("demo").classList; document.getElementById("demo").innerHTML = list; </script> </body> </html>