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URL: http://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Errors/Not_a_valid_code_point

src="/static/client/runtime.d7d9ef8955af7e43.js" type="module">

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RangeError: argument is not a valid code point

메시지

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

에러 형식

RangeError

무엇이 잘못되었을까?

String.fromCodePoint() 메소드는 유효한 코드 포인트(code point)만을 받아들입니다.

code point는 유니코드의 코드 스페이스 값으로, 0부터 0x10FFFF까지의 정수 범위입니다.

NaN을 사용하는 값, 음수 (-1), 정수가 아닌 수(3.14), 또는 0x10FFFF (1114111) 보다 큰 값은 이 함수에 적용될 수 없습니다.

유효하지 않은 경우

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

유효한 경우

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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