The iframe element is the document within the document.
window object: The browser will create a corresponding window object when it opens an HTML document. However, if a document defines one or more frames (that is, contains one or more frame or iframe tags), the browser will create a window object for the original document, and then create additional window objects for each iframe. Additional window objects are child windows of the original window.
contentWindow: refers to the specified iframe or the window object where the iframe is located
Demo1
parent page fu.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>父頁面</title>
</head>
<body>
<input type=button value="調(diào)用子頁面中的函數(shù)childSay函數(shù)" onclick="callChild()">
<iframe id="myFrame" src="zi.html"></iframe>
<script type="text/javascript">
function parentSay() {
alert("我是父頁面中的方法");
}
function callChild()
{
document.getElementById("myFrame").contentWindow.childSay();
}
</script>
</body>
</html>child page zi.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>子頁面</title>
</head>
<body>
<input type=button value="調(diào)用父頁面中的parentSay()函數(shù)" onclick="callParent()">
<script type="text/javascript">
function childSay()
{
alert("我是子頁面的say方法");
}
function callParent() {
parent.parentSay();
}
</script>
</body>
</html>Demo2
parent page iframe1.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>父頁面與子頁面之間的調(diào)用</title>
</head>
<body>
<iframe src="http://localhost/iframe/iframe3.html" id="iframe3"></iframe>
<iframe src="http://localhost/iframe/iframe2.html" id="iframe2"></iframe>
<div>我是父頁面</div>
<script type="text/javascript">
var iframe2=document.getElementById('iframe2');
iframe2.onload=function(){//父頁面調(diào)用子頁面中的方法
iframe2.contentWindow.b();
};
function test2() {
console.log("我是父頁面中的方法，在子頁面中調(diào)用的");
return iframe2;
}
</script>
</body>
</html>child Page iframe2.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>子頁面</title>
</head>
<body>
<div id="test">aaa</div>
<div>子頁面</div>
<script type="text/javascript">
//子頁面iframe2.html調(diào)用父頁面iframe1.html的函數(shù):
parent.test2();
function b(){
console.log("我是子頁面iframe2");
}
function c() {
console.log("iframe3頁面調(diào)用iframe2頁面");
}
</script>
</body>
</html>Sub-page iframe3.html:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>iframe3</title>
</head>
<body>
<script type="text/javascript">
var iframe2=parent.test2();
iframe2.contentWindow.c();//iframe3調(diào)用iframe2中的方法
</script>
</body>
</html>Demo2 also implements mutual calls between sub-pages.
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