Web Reference: Jul 10, 2025 · The toUpperCase() method returns the value of the string converted to uppercase. This method does not affect the value of the string itself since JavaScript strings are immutable. Description The toUpperCase() method converts a string to uppercase letters. The toUpperCase() method does not change the original string. Jun 22, 2009 · Passing "𐐨𐑍𐑏" to this function returns the same string, but it should return "𐐀𐑍𐑏". That's because charAt splits at UTF16 code units. There are characters with case-folding definitions in the SMP that are encoded with two UTF16 code units. While simple, this shouldn't be used.
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String Prototype Touppercase Javascript Functions Net Worth 2026: Salary, Income & Wealth Net Worth & Biography
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