How Can I Decode Escaped URL Parameters in jQuery?

Decoding Escaped URL Parameters in jQuery

When retrieving URL parameters in a jQuery application, it's common to encounter issues with escaped characters, especially when parameters contain non-Latin characters or special symbols. This can lead to the infamous "malformed URI sequence" error in JavaScript.

If you're using the standard jQuery function $.getUrlParam(), it may not support URL parameters with escaped characters. In such cases, you can modify the function to handle escaping correctly.

Here's an example of a modified getURLParameter() function that can decode escaped parameters:

function getURLParameter(name) {
    return decodeURI(
        (RegExp(name + '=' + '(.+?)(&|$)').exec(location.search)||[,null])[1]
    );
}

This function uses decodeURI() to decode the parameter value after matching it using a regular expression.

To use this modified function, simply replace the original $.getUrlParam() with the updated function. For example, if you would normally use:

let searchParam = $.getUrlParam('search');

You would now use:

let searchParam = getURLParameter('search');

This modified getURLParameter() function should correctly decode escaped URL parameters, even if they contain non-Latin characters or special symbols.

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