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JavaScript
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document.addEventListener("DOMContentLoaded", () => { const DocImplementaion = document.implementation; const DocType = DocImplementaion.createDocumentType( "html", 'PUBLIC "-//W3C//DTD HTML 4.0//EN"', "http://www.w3.org/TR/REC-html40/strict.dtd"); console.log(DocType.systemId); });
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by DevDic
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