.get(0)
вернёт DOM-ноду, а не jQuery-объект. https://api.jquery.com/get/.eq(0)
https://api.jquery.com/eq/ fetch(...).then(response => response.json()).then(ObrabotkaAddWorker);
let obj = {
x: 10,
y: 'hello',
[Symbol('new')]: 'world'
};
const s = Symbol('new');
let obj = {
x: 10,
y: 'hello',
[s]: 'world'
};
console.log(obj[s]);
...
city: data[0].address?.city,
...