前端面試題

1， this: 永遠指向調用該方法的對象

function a() {
    var name = 'white';
    console.log(this.name)
}

var b = {
    name: 'yellow',
    detail: function() {
        console.log(this.name)
    },
}
b.a = a;

console.log(b.a()) // 'yellow'