RangeError: argument is not a valid code point

Pesan

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

 

Tipe error

RangeError

Apa yang salah?

String.fromCodePoint() throws this error when passed NaN values, negative Integers (-1), non-Integers (5.4), or values larger than 0x10FFFF (1114111).

Satu poin kode ialah satu nilai dalam codespace Unicode; yaitu, kisaran integer dari 0 hingga 0x10FFFF.

Contoh

Kasus tak nvalid

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

Kasus valid

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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