JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" id="input1" onkeydown="if (event.keyCode == 13) GetParameter('myParam')" />

JavaScript

function GetParameter(PPParam) {
    var input1 = document.getElementById('input1');
    var XXX = input1.value;

    var ZZZ = XXX.split('&');
    for (var i = 0; i < ZZZ.length; i++) {
        var sParameterName = ZZZ[i].split('=');
        if (sParameterName[0] == PPParam) {

            alert(sParameterName[1]);

            return sParameterName[1];
        }
    }
}