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

14 votes256 views5 answers
Enum as type typescript
TypeScript
0 vote239 views1 answer
"A neutron star's immense gravitational attraction is due primarily to its small radius and"
TypeScript
0 vote271 views1 answer
How push objects into a local stotage array
TypeScript
1 vote257 views1 answer
Swc entered unreachable code: export default from 'foo'
TypeScript
0 vote257 views2 answers
Typescript array of mixed types
TypeScript
21 votes259 views4 answers
Can't bind to 'ngmodeloptions' since it isn't a known property of 'input'
TypeScript
0 vote272 views1 answer
How to check which item is in an object property c#
TypeScript
3 votes256 views1 answer
Mysql insert exists update
TypeScript
13 votes289 views3 answers
How to check whether a string contains a substring in typescript online
TypeScript
1 vote253 views2 answers
Typescript list concat
TypeScript