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

    RangeError: {0} is not a valid code point (Firefox)
    RangeError: Invalid code point {0} (Chrome)

In this article

RangeError

?

String.fromCodePoint() (code point) .

code point , 0 0x10FFFF .

NaN , (-1), (3.14), 0x10FFFF (1114111) .

js
String.fromCodePoint("_"); // RangeError
String.fromCodePoint(Infinity); // RangeError
String.fromCodePoint(-1); // RangeError
String.fromCodePoint(3.14); // RangeError
String.fromCodePoint(3e-2); // RangeError
String.fromCodePoint(NaN); // RangeError

js
String.fromCodePoint(42); // "*"
String.fromCodePoint(65, 90); // "AZ"
String.fromCodePoint(0x404); // "\u0404"
String.fromCodePoint(0x2f804); // "\uD87E\uDC04"
String.fromCodePoint(194564); // "\uD87E\uDC04"
String.fromCodePoint(0x1d306, 0x61, 0x1d307); // "\uD834\uDF06a\uD834\uDF07"

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