A simple number validator function in JS to validate numeric inputs

numberValidator.js

function validateNumericBox(elm){
    $(elm).on('keyup', (e)=>{
        e.preventDefault()
        let rate = $(elm).val()
        if(!isNormalInteger(rate)){
            $(elm).val(0);
        }else{
            $(elm).val(rate.replace(/^0+/, "")); 
        }
    });
}
function validateDecimalBox(elm){
    $(elm).on('keyup', (e)=>{
        e.preventDefault()
        let rate = $(elm).val()
        if(!isNormalFloat(rate)){
            $(elm).val(0);
        }else{
            $(elm).val(rate.replace(/^0+/, ""));
        }
    });
}


function isNormalInteger(str) {
    str = str.trim();
    if (!str) return false;
    str = str.replace(/^0+/, "") || "0";
    const n = Math.floor(Number(str));
    return n !== Infinity && String(n) === str && n >= 0;
}

function isNormalFloat(input) {
   let RE = /^-{0,1}\d*\.{0,1}\d+$/;
   return (RE.test(input));
}