Is it possible to use a pipe in the code?

angular angular-pipe

Hongbo Miao · Feb 2, 2016 · Viewed 68.4k times · Source

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

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');
  }
}