Check if input element has a number value - Node.js Number

Node.js examples for Number:Parse

  1. HOME
  2. Node.js
  3. Number
  4. Parse

Description

Check if input element has a number value

Demo Code


function Number(input) {
    if(input.value.length > 0) {
        var clean = "";
        var bad = 0;
        for(var  i = 0; i < input.value.length; ++i) {
            var tmp = input.value.charAt(i);
            if(!( tmp >= '0' && tmp <= '9')) {
                bad = bad + 1;//from w w  w . j av  a 2s .c om
                continue;
            }
            clean = clean + tmp;
        }
        if(bad > 0) {
            input.value = clean;

        }
    }
}

Related Tutorials