Use pipe in ts file angulr

Pipe angular typescript

import { YourPipeComponentName } from 'your_component_path';

class YourService {

  constructor(private pipe: YourPipeComponentName) {}

  YourFunction(value) {
    this.pipe.transform(value, 'pipeFilter');
  }
}

Source: stackoverflow.com

Use pipe in ts file angulr

// pipe.ts
@Pipe({ name: 'filter', pure: true })
export class FilterPipe{
  transform(items: any[], args: any): any {
    let filter = args.toString();
    if(filter !== undefined && filter.length !== null){
        if(filter.length === 0 || items.length ===0){
            return items;
        }else{
            return filter ? items.filter(item=> item.title.toLocaleLowerCase().indexOf(filter) != -1) : items;
        }
    }
  }
}
// component.ts (Use in your typescript code)
const filterPipe = new FilterPipe();
const fiteredArr = filterPipe.transform(chkArray,txtSearch);
// 

First import your pipe in component. And then use your pipe in your component. Like this..

pipe.ts

/**
 * filter checkbox list
 */
@Pipe({ name: 'filter', pure: true })
export class FilterPipe{
  transform(items: any[], args: any): any {
    let filter = args.toString();
    if(filter !== undefined && filter.length !== null){
        if(filter.length === 0 || items.length ===0){
            return items;
        }else{
            return filter ? items.filter(item=> item.title.toLocaleLowerCase().indexOf(filter) != -1) : items;
        }
    }
  }
}

component.ts (Use in your typescript code)

const filterPipe = new FilterPipe();
const fiteredArr = filterPipe.transform(chkArray,txtSearch);

// xyz.html (Use in your html file)
<ul>
    <li *ngFor="todo for todos | filter:'txtsearch'"> {{todo.name}} </li>
</ul>

Source: stackoverflow.com

Similar codes

0 vote125 views1 answer
ReturnType FunctionName(FormalParameterList) { Statements ; return ReturnValue; }
TypeScript
0 vote118 views1 answer
Access single document with its id flutter
TypeScript
0 vote151 views1 answer
After effects how to parent only one property
TypeScript
0 vote111 views1 answer
Add correct host key in /root/.ssh/known_hosts to get rid of this message
TypeScript
0 vote130 views2 answers
Large curly brackets latex
TypeScript
0 vote121 views1 answer
Python requests header allow redirect false
TypeScript
1 vote169 views1 answer
Powershell script remove directory recursive
TypeScript
-4 votes122 views1 answer
Whats a group of pandas called
TypeScript
-1 vote107 views1 answer
What are the three ways for a developer to execute tests in an org
TypeScript
0 vote132 views1 answer
Npm run multiple scripts sequentially
TypeScript