要实现Angular懒加载组件的进度条,可以按照以下步骤进行:
npm install ngx-progressbar --save
import { NgProgressModule } from 'ngx-progressbar';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
@NgModule({
imports: [
NgProgressModule,
BrowserAnimationsModule,
// other modules
],
// other configurations
})
export class AppModule { }
import { Injectable } from '@angular/core';
import { NgProgress, NgProgressRef } from 'ngx-progressbar';
@Injectable({
providedIn: 'root'
})
export class ProgressBarService {
progressRef: NgProgressRef;
constructor(private progress: NgProgress) {
this.progressRef = this.progress.ref('myProgress');
}
start() {
this.progressRef.start();
}
complete() {
this.progressRef.complete();
}
}
import { Component, OnInit, OnDestroy } from '@angular/core';
import { ProgressBarService } from 'path/to/progress-bar.service';
@Component({
selector: 'app-lazy-component',
templateUrl: './lazy-component.component.html',
styleUrls: ['./lazy-component.component.css']
})
export class LazyComponentComponent implements OnInit, OnDestroy {
constructor(private progressBarService: ProgressBarService) { }
ngOnInit() {
this.progressBarService.start();
}
ngOnDestroy() {
this.progressBarService.complete();
}
}
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { ProgressBarService } from 'path/to/progress-bar.service';
const routes: Routes = [
{
path: 'lazy',
loadChildren: () => import('./lazy-module/lazy-module.module').then(m => m.LazyModuleModule),
resolve: {
progress: ProgressBarService
}
},
// other routes
];
@NgModule({
imports: [RouterModule.forRoot(routes)],
exports: [RouterModule]
})
export class AppRoutingModule { }
这样,当访问懒加载组件时,进度条会自动显示并在组件加载完成后隐藏。
请注意,以上示例仅演示了如何使用ngx-progressbar库来实现进度条效果。根据具体需求,也可以使用其他进度条库或自定义实现进度条组件。