Function.prototype.bind()
486 ワード
ビッドの最も直接的な作用はthisの指向を変えることです.
const William = {
sex: ' ',
Nation: ' ',
work: ' '
};
const getSex = function () {
console.log(this.sex);
};
const getNation = function () {
console.log(this.Nation);
};
const getWork = function () {
console.log(this.work);
};
getSex(); // ,undefined
getNation(William); // ,undefined
getNation.bind(William)(); //
let boundgetWork = getWork.bind(William);
boundgetWork(); //