Is it possible to use a pipe in the code?

Question

When I use my custom pipe in a template, it is like this:

{{user|userName}}

And it works well.

Is it possible to use a pipe in the code?

I try to use it like this:

let name = `${user|userName}`;

But it shows

userName is not defined

My alternative way is using db.collection.findOne() manually in the code. But is there any smart way?

Answer 1

First declare the pipe in the providers of your module:

import { YourPipeComponentName } from 'your_component_path';  @NgModule({   providers: [     YourPipeComponentName   ] }) export class YourServiceModule { } 

Then you can use @Pipe in a component like this:

import { YourPipeComponentName } from 'your_component_path';  class YourService {    constructor(private pipe: YourPipeComponentName) {}    YourFunction(value) {     this.pipe.transform(value, 'pipeFilter');   } } 

Answer 2

@Siva is correct. And thanks!

So the way to use the pipe in the component is like this:

let name = new UserNamePipe().transform(user); 

Link to another similar question.