JSFiddle - React, Tailwind, and code Playground

by Per Ă…strand

HTML

<textarea id="input" rows="4"></textarea>

<div id="result"></div>

JavaScript

$("#input").on("input", function(){
	var validateThis = $(this).val();
    var validateCount = validateThis.split("\n").length;
    var result = validateThis.match(/^\d+(?:\.\d+)?$/gm);
    if(result && result.length == validateCount){
        $("#result").text("Valid input! :)");
    } else{
    	$("#result").text("Invalid input! :(");
    }
});