JavaScript RangeError Argument is not a valid code point

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