Create new JSON entries conditionally
var obj = {
title: "hello"
};
var upperCase = true;
var newObj = {
...obj,
...(upperCase && {
title: "HELLO"
})
};Extract selected entries from JSONs
var item = {
id: "1",
title: "Something",
price: "100"
};
const { id, ...itemDetails } = item;
//id -> 1
// itemDetails -> {title:"Something", price:"100"}Use forEach with any iterable using spread operator
var map = new Map();
[...map].forEach(() => {});