749 B
749 B
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| Spread Operator |
Spread Operator
The spread operator (...), allows to get the elements of a collection.
One of the most commom uses is for Node Objects, when using query selectors in the browser, in order to make them iterable Array Objects:
const paragraphs = document.querySelectorAll('p.paragraph');
const arr = [...paragraphs];
Another use of the spread operator is for Array concatenation:
const arr_1 = [1, 2, 3, 4]
const arr_2 = [5, 6, 7, 8]
const arr_final = [...arr_1, ...arr_2]
// arr_final = [1, 2, 3, 4, 5, 6, 7, 8]