Factory Functions - Design Patterns in JavaScript

Factory functions are functions that create and return objects. A single factory can create different objects that share properties and methods.

0:00 Introduction
0:28 Object literals
0:58 Methods and the this keyword
2:45 Simple example
4:20 Realistic example

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[chrisjames]

Love me some Design Pattern videos. The more the merrier in my opinion. Thanks again.

[David.McDonald]

your videos keep getting better and easy to follow. Perfect pacing imo

[luciusrex]

ive been looking for this! this has been the best implementation ive seen yet. now i can make an external factory for my classes/subclasses. thanks!

[jahiddev]

Great video. Would love Dependency Injection explanarion with example of nest.js

[zeeshanali]

thank you always, please also make video on dependency injection in typescript and node js

[samchrist]

Are you gonna cover all the design patterns in javascript?. Good content

[johnnybegood]

With your first example createPerson(), you pass it an object literal, thus you still have to both type out the properties and the values for the object. Would it not be more efficient to pass the values of those properties instead to the factory function, and then let the factory function assign them to the properties of the object.

For example:

function createPerson(name, age, job) {
let obj = {};
obj.name = name;
obj.age = age;
obj.job = job;

obj.presenter = function () {
return `Hello, my name is ${this.name}, I am ${this.age} years old and my job is ${this.job}`;
}

obj.setAge = function (newAge) {
this.age = newAge;
}

return obj;

}

[sharkbye]

Learning from you a lot! Would it be possible to add the original versions of the files to the repository??