# 常用插件

# 图片相关

# Lozad.js

Lozad.js 是一款基于 IntersectionObserver API 的高性能、轻量级（〜0.5kb）和可配置的懒加载器

Lozad.js

# cropperjs

cropperjs是一款非常强大却又简单的图片裁剪工具

cropperjs

# html2canvas

“屏幕快照”、网页截屏

html2canvas

# PhotoSwipe

实现类似朋友圈图片查看功能，新浪微博移动web端的图片查看就是使用此插件

# 安装

npm install photoswipe
# or
yarn add photoswipe

# 使用

这里以 vue 应用为例

<template>
  <!-- Root element of PhotoSwipe. Must have class pswp. -->
  <div v-else class="pswp" tabindex="-1" role="dialog" aria-hidden="true">
    <!-- Background of PhotoSwipe. 
    It's a separate element as animating opacity is faster than rgba().-->
    <div class="pswp__bg"></div>
    <!-- Slides wrapper with overflow:hidden. -->
    <div class="pswp__scroll-wrap">
      <!-- Container that holds slides. 
          PhotoSwipe keeps only 3 of them in the DOM to save memory.
      Don't modify these 3 pswp__item elements, data is added later on.-->
      <div class="pswp__container">
        <div class="pswp__item"></div>
        <div class="pswp__item"></div>
        <div class="pswp__item"></div>
      </div>
      <!-- Default (PhotoSwipeUI_Default) interface on top of sliding area. Can be changed. -->
      <div class="pswp__ui pswp__ui--hidden">
        <div class="pswp__top-bar">
          <!--  Controls are self-explanatory. Order can be changed. -->
          <div class="pswp__counter"></div>
          <button class="pswp__button pswp__button--close" title="Close (Esc)"></button>
          <!-- <button class="pswp__button pswp__button--share" title="Share"></button> -->
          <!-- <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button> -->
          <!-- <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button> -->
          <!-- Preloader demo https://codepen.io/dimsemenov/pen/yyBWoR -->
          <!-- element will get class pswp__preloader--active when preloader is running -->
          <div class="pswp__preloader">
            <div class="pswp__preloader__icn">
              <div class="pswp__preloader__cut">
                <div class="pswp__preloader__donut"></div>
              </div>
            </div>
          </div>
        </div>
        <div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap">
          <div class="pswp__share-tooltip"></div>
        </div>
        <button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)"></button>
        <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)"></button>
        <div class="pswp__caption">
          <div class="pswp__caption__center"></div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import PhotoSwipe from "photoswipe/dist/photoswipe";
import UI from "photoswipe/dist/photoswipe-ui-default";
import "photoswipe/dist/photoswipe.css";
import "photoswipe/dist/default-skin/default-skin.css";

export default {
  name: "PhotoSwipe",
  data() {
    return {
      msg: "PhotoSwipe",
    };
  },
  mounted() {},
  methods: {
    imagePreview(e,currentIndex, imageArray) {
      let items = [];
      imageArray.map((item, index, array) => {
        items.push({
          src: item.picUrl,
          w: item.width,
          h: item.height,
        });
      });

      let options = {
        index: currentIndex,
        // showAnimationDuration: 0,
        // hideAnimationDuration: 0,
        showHideOpacity: true,
        getThumbBoundsFn: function (index) {
          // find thumbnail element
          let thumbnail
          if(e.target.nodeName === 'IMG'){
            thumbnail = e.target
          }else if(e.target.nodeName === 'DIV'){
            thumbnail = e.target.firstChild
          }
          // get window scroll Y
          let pageYScroll =
            window.pageYOffset || document.documentElement.scrollTop;
          // optionally get horizontal scroll
          // get position of element relative to viewport
          let rect = thumbnail.getBoundingClientRect();
          // w = width
          return { x: rect.left, y: rect.top + pageYScroll, w: rect.width };
          // Good guide on how to get element coordinates:
          // http://javascript.info/tutorial/coordinates
        },
      };

      let pswpElement = this.$refs.pswb;
      let gallery = new PhotoSwipe(pswpElement, UI, items, options);
      gallery.init();
    },
  },
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style lang="scss" scoped>

</style>

PhotoSwipe文档

# 视频相关

# flv.js

B站开源视频播放器

flv.js

# video.js

Video.js - HTML5 Video Player

video.js

# xgplayer

xgplayer 字节跳动所属

# 使用

<div id="xgplayer"></div>

import Player from "xgplayer";
//视频
let url = '//s1.pstatp.com/cdn/expire-1-M/byted-player-videos/1.0.0/xgplayer-demo.mp4'
//封面
let poster = '//s2.pstatp.com/cdn/expire-1-M/byted-player-videos/1.0.0/poster.jpg'
//初始化
let player = new Player({
    id: 'xgplayer',
    autoplay: false,
    volume: 0.3,
    url: url,
    poster: poster,
    playsinline: true,
    height: "100%",
    width: "100%"
});