53. write your own `extends` in es5

I believe you've used extends keyword in you JavaScript programs before.

Could you implement a myExtends() function in ES5 to mimic the behavior of extends?

myExtends() takes a SubType and SuperType, and return a new type.

const InheritedSubType = myExtends(SuperType, SubType)const instance = new InheritedSubType()// above should work (almost) the same as followsclass SubType extends SuperType {}const instance = new SubType()

To solve this problem, you need to fully understand what is Inheritance

note

Your code will be test against following SuperType and SubType

function SuperType(name) {    this.name = name    this.forSuper = [1, 2]    this.from = 'super'}SuperType.prototype.superMethod = function() {}SuperType.prototype.method = function() {}SuperType.staticSuper = 'staticSuper'function SubType(name) {    this.name = name    this.forSub = [3, 4]    this.from = 'sub'}SubType.prototype.subMethod = function() {}SubType.prototype.method = function() {}SubType.staticSub = 'staticSub'