代入式の左辺でスプレッド構文を使うやつ

'use strict';

const a = [1, 2, 3];

const [b, ...c] = a;

console.log(a, b, c);

'use strict';

const a = [1, 2, 3];

const [b, ...c] = a;

console.log(a, b, c);

[ 1, 2, 3 ] 1 [ 2, 3 ]

1	[ 1, 2, 3 ] 1 [ 2, 3 ]