Are there ways to incorporate a variable within a Regular Expression in Javascript?

I've already checked the Mozilla website and W3schools, but I can't seem to find the solution.

var modifyString = function (string1, string2)
{
   if (string2.match(string1))
   {
     string1 = new RegExp(string1);
     string2 = string2.replace(string1, "XXX");
     return string2;
   }

   return null;
};

modifyString("dog", "dogeatdog");

Now, I need to adjust the above RegExp to apply globally, but I'm unsure where or how to include the g character so that the function call above returns XXXeatXXX.

Any assistance on this matter would be greatly appreciated!

javascriptregex

Answer №1

Markers should be placed in the second parameter of the RegExp constructor, like this:

const regex = new RegExp(someString, 'i')

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