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Get Query String Parameters Url Values With Jquery Javascript Querystring

Have you ever needed to extract values from the query string in a URL using jQuery or plain old JavaScript? The good news is that it's easier than you might think! In this article, we will walk you through how to get query string parameters' URL values using jQuery and regular JavaScript.

When a URL has parameters in the query string like `?key1=value1&key2=value2`, you may want to extract and use these values in your code. This can be helpful in scenarios like tracking user activity, passing data between pages, or customizing content based on the URL parameters.

One common approach to achieve this is by using JavaScript to parse the query string and extract the values. However, jQuery provides a more concise and user-friendly way to work with URLs. Let's explore both methods.

### Using JavaScript to Get Query String Parameters

To access the query string in JavaScript, you can use the `window.location.search` property. This property returns the query string of the URL, including the leading '?' character. You can then parse this string to get the individual parameters and values.

Here's a simple example using vanilla JavaScript to extract parameters from a URL:

Javascript

function getParameterByName(name, url) {
    if (!url) url = window.location.href;
    name = name.replace(/[[]]/g, "\$&");
    var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
        results = regex.exec(url);
    
    if (!results) return null;
    if (!results[2]) return '';
    
    return decodeURIComponent(results[2].replace(/+/g, " "));
}

You can then call this function with the parameter name to retrieve its value, as shown below:

Javascript

var value = getParameterByName('key1', window.location.search);
console.log(value);

### Utilizing jQuery for a Simplified Approach

If you're using jQuery in your project, you can leverage the `$.param` function to easily extract URL parameters. The `$.param` function converts a JavaScript object into a serialized URL query string.

Here's an example of how you can use jQuery to extract query string parameters:

Javascript

function getUrlVars() {
    var vars = {};
    var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m, key, value) {
        vars[key] = value;
    });
    return vars;
}

var params = getUrlVars();
console.log(params['key1']);

By calling `getUrlVars()` function, you can get an object containing all the parameters and their values from the query string.

In conclusion, extracting query string parameters from a URL is a common task in web development. Whether you prefer using plain JavaScript or jQuery, both methods are effective in achieving this goal. Choose the approach that best fits your project's requirements and start accessing those URL values with ease!

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