Pavel Shvedov

const obj = {className: 'test'}
let str = `<ul class="{{ className }}"/<ul>`
for (let key in obj ) {
    str = str.replace(new RegExp(key, 'g'), obj[key]);
}

const login = 'Login2';
const data = [
   {
      "id": "1",
      "login": "Login1",
   },
   {
      "id": "2",
      "login": "Login2",
   }
];
const loginFound = !!data.find(l => l.login === login);
console.log(loginFound);

const test = [
  ...defaultTest.references.map(({ something }) => ({ something, main: defaultTest.main, defaultTest: true })),
  ...systemTest.references.map(({ something }) => ({ something, main: systemTest.main, systemTest: true })),
];