How to implement Builder Pattern in Node.js

#node #pattern #builder

https://ozenero.com/implement-builder-pattern-nodejs-example

When we want to create complicated object which has multiple parts, we can use Builder Pattern that separates the building of these parts. This creational process does not care about how these parts are assembled.

In this tutorial, we're gonna look at 2 ways to implement Builder Pattern in Node.js:

using Builder function
using Builder class

Node.js Builder Pattern example using Builder function

Our Builder function works as a Builder object that can build a Person object.
A Person object has 4 fields: name, age, location, languages.

PersonBuilder.js


function PersonBuilder() {
    this.person = {};
    this.setName = name => {
        this.person.name = name;
        return this;
    }
    this.setAge = age => {
        this.person.age = age;
        return this;
    }
    this.setLocation = location => {
        this.person.location = location;
        return this;
    }
    this.setLanguages = languages => {
        this.person.languages = languages;
        return this;
    }
    this.buildInfo = () => this.person;
}

module.exports = PersonBuilder;

Now look at the code in app.js:

More at:

https://ozenero.com/implement-builder-pattern-nodejs-example

How to implement Builder Pattern in Node.js