SOURCE

Function.prototype.mycall = function (ctx, ...args) {
    ctx = ctx === undefined || ctx === null ? globalThis : Object(ctx)
    const fn = this
    const key = Symbol('temp')
    // console.log(333, key)
    Object.defineProperty(ctx, key, {
        enumerable: false,
        value: fn
    })
    const result = ctx[key](...args)
    delete ctx[key]

    return result
}

function method(a, b) {
    console.log(this, a, b)
    return a + b
}

console.log(method.mycall(111, 1, 2))
console.log(method.call(111, 1, 2))