JavaScript regex not matching but does when using online editor- variable issue?

Question

I assume it has something to do with using a variable, when I test it online I don't use a variable and it works. I haven't used much regex so I could just be doing something silly too.

let home = 'testhome';
let currentHome = 'testhome (8)';
let re = new RegExp(home + ' \(\d+\)');

if (currentHome.match(re)) {
    //no match
} else {
    // this is the code executed
}

Any help appreciated. There could be multiple numbers in the brackets of currentHome.

Answer 1

When using RegExp constructor you should escape the escape character itself in order to form a correct reg expression.

let re = new RegExp(home + ' \\(\\d+\\)');