#懒加载Libraries
#通用做法
const colorThief = () => import('color-thief').then(p => p.default)
#依赖注入
// 定义InjectionToken
type LazyColorThief = ReturnType<typeof color-thief>
const COLORTHIEF = new InjectionToken<LazyColorThief>('Lazily loaded colorThief', { provideIn: 'root', factory: color-thief })
// 使用token
constructor(@Inject(COLORTHIEF) private colorThief: LazyColorThief) {
this.colorThief.then(colorThief => {
// use it
})
}