1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<input type="text" id="text">
<button id="btn">发送</button>
<ul id="ul"></ul>
<hr/>
<iframe src="./2.html" width="1000" height="400"></iframe>
</body>
</html>
<script>
var oText = document.querySelector("#text");
var oBtn = document.querySelector("#btn");
oBtn.onclick=function(){
if(oText.value){
var oIframe = document.querySelector("iframe");
oIframe.contentWindow.postMessage(oText.value);
}
}
window.addEventListener("message",({data})=>{
var oLi = document.createElement("li");
var oText = document.createTextNode(data);
oLi.appendChild(oText);
document.querySelector("#ul").appendChild(oLi);
})
</script>
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<h4>收到的消息是</h4>
<ul id="ul">
</ul>
<input type="text" id="text">
<button id="btn">给父级发送消息</button>
</body>
</html>
<script>
window.addEventListener("message",function({data}){
var oUl = document.querySelector("#ul");
var oLi = document.createElement("li");
var oText = document.createTextNode(data);
oLi.appendChild(oText);
oUl.appendChild(oLi);
})
var oBtn = document.querySelector("#btn");
var oText = document.querySelector("#text");
oBtn.onclick=function(){
var value = oText.value;
if(value){
parent.postMessage(value);
}
}
</script>
|
iframe多层嵌套
window.frames[0].frame[0].frame[0].postMessage(‘值’); //window指向当前层，该代码可以由A层直接到D层
相同,parent.postMessage();可以由子向父传值
parent.parent.parent.postMesage(); 可以向父级之上的父级传值
top.postMessage()可以向顶层传值
