typescript 打字稿泛型示例

Posted 2021-05-20

interface Bookmark {
    id: string;
}
class BookmarksService {
    items: Bookmark[] = [];
}

class BookmarksService<T> {
    items: T[] = [];
}

class BookmarksService<T extends Bookmark> {
    items: T[] = [];
}

class SearchPageComponent {
    movie: Movie;
    constructor(private bs: BookmarksService<Movie>) {}
    getFirstMovie() {
        this.movie = this.bs.items[0]; //