let regexp = /t(e)(st(\d?))/g;
let str = 'test1test2';
let array = [...str.matchAll(regexp)];
console.log(array[0]);
// expected output: Array ["test1", "e", "st1", "1"]
console.log(array[1]);
// expected output: Array ["test2", "e", "st2", "2"]
let regexp = /t(e)(st(\d?))/g;let str = 'test1test2';let array = [str.matchAll(regexp)];console.log(array[0]);// expected output: Array ["test1", "e", "st1", "1"]console.log(array[1]);// expected output: Array ["test2", "e", "st2", "2"]