Case insensitive regex in JavaScript

Question

I want to extract a query string from my URL using JavaScript, and I want to do a case insensitive comparison for the query string name. Here is what I am doing:

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Answer 1

Simple one liner. In the example below it replaces every vowel with an X.

function replaceWithRegex(str, regex, replaceWith) {
  return str.replace(regex, replaceWith);
}

replaceWithRegex('HEllo there', /[aeiou]/gi, 'X'); //"HXllX thXrX"