Angular

ElementRef、Renderer

segmentfault.com/a/119000000…

import * as xxx from 'xxx'

import * as xxx from 'xxx'  会将 "xxx" 中所有 export 导出的内容组合成一个对象返回(或import * as obj from 'xx'  这种写法是把所有的输出包裹到obj对象里);
eg：
xxx里中：
export function test(){
  return '返回是test 内容';
 }
export function login(){
  return '返回login 内容';
 }
调用test 函数，即obj.test();
调用login 函数，即obj.login();

visibilitychange

浏览器标签页被隐藏或显示的时候会触发visibilitychange事件

https://www.jianshu.com/p/e905584f8ed2

swiper

#js
this.swiper = new Swiper(this.element.querySelector('.swiper'), {
   onSlideChangeEnd: ({ activeIndex }) => {
    this.activeIndex = activeIndex;
   },
    autoplay:true,
 }});
#html
<div class="swiper">
            <div class=" swiper-wrapper">
              <div class="swiper-slide"
                   *ngFor="let thumbnail of model?.thumbnails">
                <img [src]="thumbnail">
              </div>
            </div>
            <div class="swiper-pagination abs" fs="10">
              {{activeIndex + 1}}/{{model?.thumbnails.length}}
            </div>
            <div class="product-page-save-new"  *ngIf="model&&model.brand&&!errorRequest" (click)="downloadPics()" >
              <i class=" material-icon  product-page-save-icon">file_download</i>
            </div>
          </div>

Location

angular 中location服务负责和浏览器的url打交道， 比如规格化url、前进、后退、拼接url等