Incorporating a variable into a regular JavaScript pattern

In my JavaScript code, I have a variable assigned as var num = "x". How can I incorporate this variable into a regular pattern?

var pattern = /"i want to include the variable num here"/i

If I were working with a string, it would look something like this:

var str = ""+num+"";

Answer №1

If you need to check for specific patterns in a string, consider using RegExp.

let letter = "x";
let phraseToCheck = "string with x here";
let pattern = new RegExp(letter, 'i');
let result = pattern.test(phraseToCheck);

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