find the character "(" in a string in js

I have a string in my JS that may contain the character (M and I need to find their position – but I can’t work out how to without throwing an error I guess due to the bracket.

const findMTag = "(M"; //I need to search for this but it throws an error
let posMTag = nameJoined.search(findMTag);
console.log("TAG position =  " + posMTag);

>Solution :

String.search accepts a Regular expression as its argument, but you’re passing a string to it, so it doesn’t work. Take a look at String.search() for more info.

So your code will look like:

const findMTag = /\(M/;
const posMTag = nameJoined.search(findMTag);
console.log("TAG position =  " + posMTag);