Object 对象实现for of 迭代遍历

实现代码

Object.prototype[Symbol.iterator] = function () {
    let keys = Object.keys(this);
    let index = 0;
    return {
        next: () => {
            return {
                value: this[keys[index++]],
                done: index >= keys.length + 1 ? true : false,
            }
        }
    }
}

var obj={
    a:"skfjslkjdfs",
    b:"sklfjlskjdfks"
}

for(let i of obj){
    console.log(i,"iiii")
}

实现方式2，使用生成器实现

Object.prototype[Symbol.iterator] = function* () {
    for (let key of Object.keys(this)) {
        yield this[key];
    }
};

var obj = {
    a: "skfjslkjdfs",
    b: "sklfjlskjdfks"
};

for (let i of obj) {
    console.log(i, "iiii");
}

截图