Many times, we may come across a scenario where we want to construct complex objects which involves computing multiple sequential operations. In such a scenario, a builder pattern can be used.

Builder Pattern: A Design Pattern that lets us extract the object construction out of its own class (its representation) so that it can be used for multiple different representations.

One advantage to use this pattern is, it lets us build objects with one operation on top of another where we don’t need to call all operations at a time, only the ones that are needed to produce a particular output.

In this article, we will go through a simple example as to how to implement builder pattern in Javascript.

Let’s say we want to do something like

let calculator = new Calculator()

let result = calculator.add(5).subtract(1).divide(2).compute()

This instantiates a calculator and performs multiple operations on top of one another and finally compute something.

#javascript #design-patterns #builder-pattern #programming