Angular16管道pipe问题?-灵析社区

想用一下管道，这是哪里出了问题？  1.pipe import { Pipe, PipeTransform } from '@angular/core'; import { Category } from '../interface'; @Pipe({name: 'category'}) export class CategoryPipe implements PipeTransform { transform(value: number): string { return Category(value) } } 2. interface export interface Todo { id: number; description: string; category: number; content: string; } export enum Category { html, css, js }