003.bind

[mewcoder]

实现 bind 方法

[mewcoder]

Function.prototype.myBind = function (obj, ...args) {
    const ctx = obj || globalThis;
    const fn = Symbol();
    ctx[fn] = this;
    const self = this;
    const res = function (...others) {
        const target = this instanceof self ? this : ctx;
        return self.apply(target, [...args, ...others]);
    };
    if (this.prototype) {
        res.prototype = Object.create(this.prototype);
    }
    return res;
};