![[vIMP] JavaScript | Promise Implementation | Challenges](https://miro.medium.com/fit/c/224/224/0*I8vzE0EZlY-_TUvb.png)
![[vIMP] JavaScript | Promise Implementation | Challenges](https://miro.medium.com/fit/c/112/112/0*I8vzE0EZlY-_TUvb.png)
call,
Function.prototype.myCall = function(currentContext = {}, ...arg) {
if (typeof this !== 'function') {
throw new Error(this + "it's not callable");
} currentContext.fn = this;
currentContext.fn(...arg);
};
apply,
Function.prototype.myApply = function(currentContext = {}, arg = []) {
if (typeof this !== 'function') {
throw new Error(this + "it's not callable");
} if (!Array.isArray(arg)) {
throw new TypeError('called on non-object')
} currentContext.fn = this;
currentContext.fn(...arg);
};
bind,
Function.prototype.myBind = function(currentContext = {}, ...arg) {
if (typeof this !== 'function') {
throw new Error(this + "cannot be bound as it's not callable");
} currentContext.fn = this;
return function () {
return currentContext.fn(...arg);
};
};
I know there would always be something to improve. Please feel free to share your thoughts
