HTML5提供了新型機制PostMessage實現安全的跨源通訊. 文法
otherWindow.postMessage(message, targetOrigin, [transfer]);
otherWindow: 其他視窗的一個引用, 比如IFRAME的contentWindow屬性, 執行,
window.open返回的視窗對象. message: 將要發送到其他視窗的資料. targetOrigin:
通過視窗的origin屬性來指定哪些視窗能接收到訊息事件, 其值可以是字元”*”(表示無限制)或者一個URL transfer:
是一串和message同時傳遞的Transferable對象. 這些對象的所有權將被轉移給訊息的接收方, 而發送一放將不再保有所有權.
element.addEventListener(event,fn,useCaption ); 三個參數 event 事件 比如
click mouseenter mouseleave 回呼函數 useCaption
用於描述是冒泡還是捕獲。預設值是false，即冒泡傳遞。 當值為true，就是捕獲傳遞。
主介面 main.html
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>跨域資料訪問</title> <script type="text/javascript"> window.addEventListener('message',function(e){ console.log("e--->",e); const data = e.data; document.getElementById('main1').style.backgroundColor=e.data; },false) </script></head><body> <p id="main1" style="width:200px;height:200px;margin:100px;border:solid 1px #000;"> 我是主介面,等待接收iframe的傳遞 </p> <p style="margin:100px;"> iframe <iframe src="http://localhost:3000/iframe.html" width="800px" height="300px" ></iframe> </p></body></html>
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style type="text/css"> html,body{ height:100%; margin:0px; } </style></head> <body style="height:100%;"> <p id="frame" style="height:200px; width:200px;background-color:rgb(204, 204, 0)" onclick="changeColor()"> 點擊改變顏色 </p> <script type="text/javascript"> function changeColor(){ var frame = document.getElementById('frame'); var color=frame.style.backgroundColor; if(color=='rgb(204, 102, 0)'){ color='rgb(204, 204, 0)'; }else{ color='rgb(204,102,0)'; } console.log("frame===>",frame); console.log("color",color); frame.style.backgroundColor=color; window.parent.postMessage(color,'*'); } </script> </body></html>Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
