I want to escape special characters below in data

https://jsfiddle.net/xhtfpa0y/

let regex = /([\\\[])/g
let data = `test \ test \ test \ test [`;
let matches = [...data.matchAll(regex)];
console.log(matches);

It doesn't seem to match in javascript whereas it does in regex101

https://regex101.com/r/ojBw3M/1