RangeError: argument is not a valid code point - JavaScript | MDN

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String.fromCodePoint()

The JavaScript exception "Invalid code point" occurs when NaN values, negative Integers (-1), non-Integers (5.4), or values larger than 0x10FFFF (1114111) are used with String.fromCodePoint().

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This page was last modified on Jul 8, 2025 by MDN contributors.

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