背景：项目中有一个场景要监听android手机物理返回键，但是app和js的中间件又没提供这个事件的监听，只能百度纯js实现了
第一步：
xback.js
;!function(pkg, undefined){ var STATE = 'x-back'; var element; var onPopState = function(event){ event.state === STATE && fire(); } var record = function(state){ history.pushState(state, null, location.href); } var fire = function(){ var event = document.createEvent('Events'); event.initEvent(STATE, false, false); element.dispatchEvent(event); } var listen = function(listener){ element.addEventListener(STATE, listener, false); } ;!function(){ element = document.createElement('span'); window.addEventListener('popstate', onPopState); this.listen = listen; this.record = record(STATE); record(STATE); }.call(window[pkg] = window[pkg] || {}); }('XBack');
第二步：
加载xback.js文件
<remote-script src="https://www.jb51.net/js/xback.js" @load="loadXBack"></remote-script>
自定义组件remote-script可以参考我另外的一篇文章：https://www.jb51.net/article/178777.htm
第三步：
监听返回键事件
methods: { // JavaScript监听手机物理返回键 loadXBack () { window.XBack.listen(() => { this.dialog = this.$createDialog({ type: 'confirm', content: `确定返回吗？`, confirmButton: { text: '确定', active: true, disabled: false }, cancelButton: { text: '取消', active: false, disabled: false }, onConfirm: () => { this.dialog.hide() this.close() }, onCancel: () => { this.dialog.hide() window.history.pushState('x-back', null, window.location.href) } }) this.dialog.show() }) }, }