Check if string contains only digits Check if string contains only digits javascript javascript

Check if string contains only digits


javascript numbers digits

how about

let isnum = /^\d+$/.test(val);

javascript numbers digits 

string.match(/^[0-9]+$/) != null;

javascript numbers digits 

String.prototype.isNumber = function(){return /^\d+$/.test(this);}console.log("123123".isNumber()); // outputs trueconsole.log("+12".isNumber()); // outputs false

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