This JavaScript exception Invalid code point occurs if NaN values, negative Integers, non-Integers, or other values larger than 0x10FFFF are used with the String.fromCodePoint() method.
Output:
RangeError: {0} is not a valid code point (Firefox) RangeError: Invalid code point {0} (Chromium)
Error Type:
RangeError
Cause of the error: The String.fromCodePoint() is used to return a string created using the sequence of code points that are specified as parameters. It throws this error if the passed code point values are NaN values, negative Integers, non-Integers, or values larger than 0x10FFFF.
Example 1: This example works without throwing any error because the value passed to the method is valid.
function Geeks() {
try {
String.fromCodePoint(34);
console.log( "'Argument is not a valid code point'" +
" error has not occurred" );
} catch (e) {
// Show the error in console
console.log(e);
console.log( "'Argument is not a valid code point'" +
" error has occurred" );
}
} Geeks(); |
Output:
'Argument is not a valid code point' error has not occurred
Example 2: In this example, the value passed to the method is NaN, which is an invalid value, therefore the error has occurred.
function Geeks() {
try {
String.fromCodePoint(NaN);
console.log( "'Argument is not a valid code point'" +
" error has not occurred" );
} catch (e) {
// Show the error in console
console.log(e);
console.log( "'Argument is not a valid code point'" +
" error has occurred" );
}
} Geeks(); |
Output:
'Argument is not a valid code point' error has occurred