What is the principle of sort() method in JavaScript and how is it implemented?

Question

sort() sorts the array and replaces the original array elements. But how is it implemented? Is it through bubbling? Quick sort or some other sorting method? Ask for advice~

[9, 3, 4, 6, 1, 2, 8, 7].sort(function(x, y) {
    return x - y;
})

Result: [1, 2, 3, 4, 6, 7, 8, 9]

————————————————————————————

[9, 3, 4, 6, 1, 2, 8, 7].sort(function(x, y) {
    return y-x;
})

Result: [9, 8, 7, 6, 4, 3, 2, 1]

Answer 1

/q/10...

Answer 2

Different browser implementations may be different, and the sorting method may also be different depending on the number of array elements. I remember there is an article about this, search it first and then ask