How to Perform Case-Insensitive Regex Evaluation in JavaScript for Query String Extraction?

Case-Insensitive Regex Evaluation in JavaScript for Query String Extraction

Often in web development, it becomes necessary to extract query string parameters from a URL. For that, regular expressions are employed.

Objective:

The task is to perform a case-insensitive search while extracting query string parameters using JavaScript's RegExp object.

Method:

The RegExp constructor allows the specification of a third argument, known as the flags. One such flag is 'i', which denotes case insensitivity.

Solution:

To achieve case-insensitive comparison, implement the following:

<code class="javascript">var results = new RegExp('[\?&amp;]' + name + '=([^&amp;#]*)', 'i').exec(window.location.href);</code>

The 'i' flag will ensure that the comparison of the query string parameter name is case-insensitive.

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