标签:height js代码 turn catch content source addm rem sel
需求背景:
存在多个项目(顶级域名相同.scc.com),当打开多个tab页时,我在一个页面退出登录,其他页面同步信息,页面弹出已登出提示。
实现方式 iframe + postMessage + localStorage
如有三个已登陆的页面 A1 A2 B1
页面A1: http://a1.scc.com
页面A2: http://a2.scc.com
页面B1: http://b1.scc.com
一个空的iframe页面: http://static.scc.com/iframe.html
http://static.scc.com/iframe.html 内容如下
<html> <body> <script> window.addEventListener("storage", function (ev) { ev = window.event || ev if (ev.key == "scc_message") { window.parent.postMessage(ev.newValue, "*"); } }); function postMessageToStorage(message) { localStorage.setItem("scc_message", JSON.stringify(message)); localStorage.removeItem("scc_message"); } window.addEventListener("scc_message", function (ev) { ev = window.event || ev let data = ev.data; postMessageToStorage(data); }); </script> </body> </html>
页面 A1 A2 B1 代码相同
DOM引入iframe标签
<iframe id="sccproxy" src="//static.scc.com/iframe.html" style="width:0px;height:0px;frameBorder:0"></iframe> <div v-if=flag"> <h3><i></i><span >登录状态已改变</span></h3> <p>当前账号的登录状态已改变,页面即将刷新。</p> <div><a href="/">确定</a></div> </div>
<button @click="sendMessageToTab({type:‘‘sccExit})">退出登录<button>
js代码
data () { return { flag:false } } mounted () { this.addMessageListener () }, methods: { addMessageListener () { let _this = this window.addEventListener("message", function (ev) { ev = window.event || ev let data = ev.data; let source = ev.source; let origin = ev.origin; if (!data) return; if (origin.indexOf("//static.scc.com") >= 0) { try { let info = JSON.parse(JSON.parse(data)); if (info.type == "sccExit" && !document.hasFocus()) { _this.flag = true } } catch (e) { console.log(e) } } }); }, sendMessageToTab (data) { try { document.querySelector("#sccproxy").contentWindow.postMessage(JSON.stringify(data), ‘http://static.scc.com‘); } catch (err) { console.log(err) } } }
iframe + postMessage + localStorage 实现多标签页信息同步
标签:height js代码 turn catch content source addm rem sel
原文地址:https://www.cnblogs.com/shichangchun/p/12055826.html