vue页面监听是否置为后台或可见状态问题

npm i vue-visibility-change

import Vue from 'vue'
import visibility from 'vue-visibility-change'

Vue.use(visibility)

const listenPageVisible = visibility.change((evt, hidden) => {
  console.log('隐藏: ' + hidden)
})

<template>
  <div v-visibility-change="listenVisible"></div>
</template>
<script>
export default {
  methods: {
    listenVisible(evt, hidden) {
      console.log('隐藏: ' + hidden)
    }
  }
}
</script>

export const pageChangeShowHide = function(){
    let hidden,state,visibilityChange;
    if(typeof document.hidden !== 'undefined'){
        hidden = 'hidden';
        state = 'visibilityState';
        visibilityChange = 'visibilitychange';
    }else if(typeof document.mozHidden !== 'undefined'){
        hidden = 'mozHidden';
        state = 'mozvisibilityState';
        visibilityChange = 'mozvisibilitychange';
    }else if(typeof document.msHidden !== 'undefined'){
        hidden = 'msHidden';
        state = 'msvisibilityState';
        visibilityChange = 'msvisibilitychange';
    }else if(typeof document.webkitHidden !== 'undefined'){
        hidden = 'webkitHidden';
        state = 'webkitvisibilityState';
        visibilityChange = 'webkitvisibilitychange';
    }
    return { hidden,state,visibilityChange }
}

this.$nextTick(() => {
    let { hidden, state, visibilityChange } = common.pageChangeShowHide()
    document.addEventListener(visibilityChange, ()=> {
        // 页面变为可见时触发 
        if (document[state] == 'visible') {
            this.memberdayActivityInfo()
        }
    });
})