destructure every character, just as if the string was an array
let a, b, c = 'abc';
assert.deepEqual([a, b, c], ['a', 'b', 'c']);missing characters are undefined
const [a, c] = 'ab';
assert.equal(c, void 0);unicode character work too
const [space, coffee] = 'a ☕';
assert.equal(coffee, '\u{2615}');