故障：在安卓qq浏览器中，v-lazy-image始终无法显示。

原因分析：

经调试，发现qq浏览器中IntersectionObserver缺少一个isIntersecting字段，而v-lazy-image插件是根据isIntersecting来显示图片的，故只能借助intersectionRatio判断。

另外还有一点差别就是如果v-lazy-image组件初始宽高为0的话，会导致intersectionRatio始终为0。

解决方案：

基于v-lazy-image源码修改自定义一个vue插件模块，代码见文末。

v-lazy-image使用的时候设置 src-placeholder ，保证v-lazy-image有个初始大小，这里我随便制作了一个 1x1 的空白图片，示例代码如下

main.js 修改

import { VLazyImagePlugin } from './plugins/VLazyImage'// polyfillrequire('intersection-observer')Vue.use(VLazyImagePlugin)

组件：

修改后的插件源码：plugins/VLazyImage

const VLazyImageComponent = {  props: {    src: {      type: String,      required: true    },    srcPlaceholder: {      type: String,      default: ''    },    srcset: {      type: String    },    intersectionOptions: {      type: Object,      default: () => ({})    },    usePicture: {      type: Boolean,      default: false    }  },  inheritAttrs: false,  data: () => ({ observer: null, intersected: false, loaded: false }),  computed: {    srcImage () {      return this.intersected ? this.src : this.srcPlaceholder    },    srcsetImage () {      return this.intersected && this.srcset ? this.srcset : false    }  },  methods: {    load () {      if (this.$el.getAttribute('src') !== this.srcPlaceholder) {        this.loaded = true        this.$emit('load')      }    }  },  render (h) {    let img = h('img', {      attrs: {        src: this.srcImage,        srcset: this.srcsetImage      },      domProps: this.$attrs,      class: {        'v-lazy-image': true,        'v-lazy-image-loaded': this.loaded      },      on: { load: this.load }    })    if (this.usePicture) {      return h('picture', { on: { load: this.load } }, this.intersected ? [ this.$slots.default, img ] : [])    } else {      return img    }  },  mounted () {    if ('IntersectionObserver' in window) {      this.observer = new IntersectionObserver(entries => {        const image = entries[0]        if (image.isIntersecting || image.intersectionRatio) {          this.intersected = true          this.observer.disconnect()          this.$emit('intersect')        }      }, this.intersectionOptions)      this.observer.observe(this.$el)    } else {      console.error(        "v-lazy-image: this browser doesn't support IntersectionObserver. Please use this polyfill to make it work https://github.com/w3c/IntersectionObserver/tree/master/polyfill."      )    }  },  destroyed () {    this.observer.disconnect()  }}export default VLazyImageComponentexport const VLazyImagePlugin = {  install: (Vue, opts) => {    Vue.component('VLazyImage', VLazyImageComponent)  }}