ByteDance Shanghai Interview Failed 1

1. Browser cache. - cookie.
2. Breadth-First Traversal and Depth First Traversal.
3. script tag. async and defer.
4. React Hook

var obj = {
  a: 1,
  foo: function (b) {
    b = b || this.a;
    return function (c) {
      console.log(this.a);
      console.log(b);
      console.log(c);
    };
  },
};

var a = 2;
var obj2 = { a: 3 };

obj.foo(a).call(obj2, 1);
obj.foo.call(obj2)(1);