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javascriptparsefloat

Is it possible to parseFloat the whole string?

As you know, the javascript's parseFloat function works only until it meets an invalid character, so for example

parseFloat("10.123") = 10.123
parseFloat("12=zzzz") = 12
parseFloat("z12") = NaN

Is there a way or an implementation of parseFloat that would return NaN if the whole string is not a valid float number?

Solution

  • Use this instead:

    var num = Number(value);

    Then you can do:

    if (isNaN(num)) {
    // take proper action
}