JSFiddle - React, Tailwind, and code Playground

by sunil puvvada

JavaScript

let phonenumber = 9412495983;    
let pn = phoneNumber.trim();
    pn = pn.replace(/\D/g, '');

    // remove leading 91 and 0 if length is too long
    if (pn.length > 10) {
        pn = pn.replace(/^91/, '');
        pn = pn.replace(/^0/, '');
    }

    if (pn.match(/[56789]\d{9}/) === null) {
        console.log("Error");
    }