From the course: Mastering Nest.js: Build Scalable Applications with Mastery in Nest.js Framework

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Creating a custom pipe

Creating a custom pipe - Nest.js Tutorial

From the course: Mastering Nest.js: Build Scalable Applications with Mastery in Nest.js Framework

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Creating a custom pipe

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Alright, so after understanding and implementing important built-in pipes, now let's see how to create a custom pipe. First of all, let's discuss why we need a custom pipe. Custom pipes are necessary when the built-in pipes fail the requirement to meet certain validations or transformation on the data. So custom pipes work like personalized filters for data, fulfilling the needs of processing the data the way we want. Let's understand the syntax of a custom pipe practically. Let's create a separate folder for defining custom pipes. I'll name the folder as custom pipe, creating a TypeScript file inside it, phoneauth.ts. Now the first thing we are going to do is specify the injectable decorator because we will inject this pipe inside the controller as a dependency. So whenever we create a custom pipe, we first mark it as injectable so that it can be used anywhere in the entire application. Next step is to define the class. I'll give the export class PhoneAuth, and we will implement an…

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