JSFiddle - React, Tailwind, and code Playground

by Swami

HTML

<a href="https://code2care.org">Example by Code2care.org</a>
<br/>
<h1>
Check if inputed text is a number using Regex
</h1>
<input type="text" id="text">
<button type="button" onClick="checkisNumber()">Check</button>
<div id="result"></div>

JavaScript

function checkisNumber() {
 var no = document.getElementById("text").value;
 
 var isNoRegex=/^\d*(\.)?(\d{1,})?$/;
 
 if(!no.match(isNoRegex)) {
 	document.getElementById("result").innerHTML = no + " is not a number";
 } else {
 	document.getElementById("result").innerHTML = no + " is a number";
 }
 
}