--- title: js网络变化 url: 'https://yayi.site/archives/js网络变化' categories: javaweb cover: 'https://cdn.jsdelivr.net/gh/yan-bolan/picbed/img/动漫/結城友奈は勇者である/犬吠·埼 樹.png' abbrlink: df0fabd4 date: 2019-10-16 13:23:47 updated: 2021-05-14 22:02:36 tags: ---  \`\`\`javascript window.ononline = function() { alert("链接上网络了"); } window.onoffline = function() { alert("网络链接已断开"); } // Your code here... window.addEventListener('online', function(){ alert('网络连接恢复！'); }) window.addEventListener('offline', function(){ alert('网络连接中断！'); }) \`\`\` 只能判断网线插拨，不能判断ping通