How do I create custom pipes in Angular?

How do I create custom pipes in Angular?

To create a custom pipe in Angular, you need to use the @Pipe decorator and implement the PipeTransform interface.

Can you show me a simple example of a custom pipe?

Sure! Here's a simple example of a pipe that transforms text to uppercase:

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({ name: 'uppercase' })
export class UppercasePipe implements PipeTransform {
  transform(value: string): string {
    return value.toUpperCase();
  }
}

How do I use this pipe in my template?

You can use the pipe in your template like this: {{ 'hello' | uppercase }}. It will display 'HELLO'.

What if I want to pass parameters to my custom pipe?

You can pass parameters by adding them after the pipe name, like this: {{ value | myPipe: param1: param2 }}.