Why do Form Elements Disappear After Executing Document.write?

Document.write Clears Form Elements

Issue:

Upon executing document.write within the validator() function, the checkbox and button elements disappear from the page.

Explanation:

document.write() writes to the document stream. When the validator() function is called via the button's onClick handler, the document has likely finished loading and the stream is closed.

Calling document.write() on a closed document stream automatically invokes document.open(), which clears the document. Consequently, the form elements are removed from the screen.

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