how to get param === undefined from url in javascript code example

Example 1: get url query params js

const urlParams = new URLSearchParams(window.location.search);
const myParam = urlParams.get('myParam');

Example 2: javascript get query parameter

function getUrlParameter(name) {
    name = name.replace(/[\[]/, '\\[').replace(/[\]]/, '\\]');
    var regex = new RegExp('[\\?&]' + name + '=([^&#]*)');
    var results = regex.exec(location.search);
    return results === null ? '' : decodeURIComponent(results[1].replace(/\+/g, ' '));
};

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Javascript Example

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