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What are the methods for calling the parent window in javascript?
- 青灯夜游Original
- 2021-06-23 15:13:483160browse
Javascript method to call the parent window: 1. Use the "window.parent" statement to call the parent page object in the iframe page; 2. Use the "window.opener" statement to open it in "window.open" Call the parent page object in the child page.
The operating environment of this tutorial: Windows 7 system, JavaScript version 1.8.5, Dell G3 computer.
What are the methods for javascript to call the parent window (parent page)
1. Window.parent is the iframe page that calls the parent page. Object
Example:
a.html
<html>
<head><title>父页面</title></head>
<body>
<form name="form1" id="form1">
<input type="text" name="username" id="username"/>
</form>
<iframe src="b.html" width=100%></iframe>
</body>
</html> If we need to assign a value to the username text box in a.htm in b.htm, like There are many upload functions. The upload function page is in Ifrmae. After the upload is successful, put the uploaded path into the text box of the parent page
We should write
<script type="text/javascript">
var _parentWin = window.parent ;
_parentWin.form1.username.value = "xxxx" ;
</script>source code in b.html:
a.html
<html>
<head>
<title>主页面</title>
<script>
/** 为测试IFrame子窗口调用父窗口的全局变量而添加的测试变量 */
var parentVairous = "为测试IFrame子窗口调用父窗口的全局变量而添加的测试变量";
function parentInvokeIFrame()
{
var iframeTest = document.frames["iframeTest"]; //使用document.getElementById("iframeTest");同样可以
alert(iframeTest.document.body.innerHTML);
alert(iframeTest.iFrameVair);
}
</script>
</head>
<body>
<form name="form1" id="form1">
<input type="text" name="username" id="username"/>
<input type = "button" value = "父窗口调用IFrame子窗口中的内容" onclick = 'parentInvokeIFrame()'/>
</form>
<iframe src="b.html" width = '100%' id = 'iframeTest'></iframe>
</body>
</html>b.html
<html>
<head>
<title></title>
<script type="text/javascript">
/** 为测试父窗体调用IFrame子窗体的全局函数而添加的子窗口全局函数 */
var iFrameVair = "测试父窗体调用IFrame子窗体的全局函数";
function UpdateParent()
{
var _parentWin = window.parent ;
_parentWin.form1.username.value = "xxxx" ;
}
function childInvokeParent()
{
var parentVairous = window.parent.window.parentVairous;
alert(parentVairous);
}
</script>
</head>
<body>
<form name="form1" id="form1">
<p> </p>
<p align="center">
<input type = "button"
name = "button"
id = "button"
value = "更新主页面的UserName内容"
onclick = "UpdateParent()">
<input type = "button"
name = "button2"
id = "button2"
value = "测试IFrame子窗口调用父窗口的全局变量"
onclick = "childInvokeParent();"/>
</p>
<p> </p>
</form>
</body>
</html>ps: cannot be obtained across domains, for example, the src of iframe is 'http://www .xxx.ccc/' is not allowed
2. window.opener is the child page opened by window.open and calls the parent page object
Source code:
a.html
<html>
<head>
<title>主页面</title>
<script type="text/javascript">
/** 为测试IFrame子窗口调用父窗口的全局变量而添加的测试变量 */
var parentVairous = "为测试IFrame子窗口调用父窗口的全局变量而添加的测试变量";
/**
* 因为不同于IFrame（IFrame有id,window.open()与IFrame的父子窗口的模式不同）,
* 所以当是通过window.open()方法打开一个新窗口使, 必须有一个新窗口的对象
* 当然必须先让子窗口弹出来, 才能调用子窗口中的变量, 否则抛出异常
*/
var OpenWindow;
function openSubWin()
{
OpenWindow = window.open('b.html', 'newwindow', 'height=1024, width=1300, top=0, left=0, toolbar=no, menubar=yes, scrollbars=yes,resizable=yes,location=no, status=no');
}
function parentInvokeChild()
{
if(OpenWindow)//当然必须先让子窗口弹出来, 才能调用子窗口中的变量, 否则抛出异常
{
alert(OpenWindow.iFrameVair);
}
}
</script>
</head>
<body>
<form name="form1" id="form1">
<input type="text" name="username" id="username"/>
<input type="button" value="弹出子页面" onclick = "openSubWin()">
<input type="button" value="测试调用弹出窗口中的全局变量" onclick = "parentInvokeChild()">
</form>
</body>
</html>b.html
<html>
<head>
<title>子页面</title>
<script type="text/javascript">
/** 为测试父窗体调用IFrame子窗体的全局函数而添加的子窗口全局函数 */
var iFrameVair = "测试父窗体调用IFrame子窗体的全局函数";
function UpdateParent()
{
var _parentWin = window.opener;
_parentWin.form1.username.value = "xxxx" ;
}
function childInvokeParent()
{
var parentVairous = window.opener.window.parentVairous;
alert(parentVairous);
}
</script>
</head>
<body>
<form name="form1" id="form1">
<p> </p>
<p align="center">
<input type="button"
onclick = "UpdateParent();"
name="button"
id="button"
value="更新主页面的UserName内容">
<input type = "button"
name = "button2"
id = "button2"
value = "测试IFrame子窗口调用父窗口的全局变量"
onclick = "childInvokeParent();"/>
</p>
<p> </p>
</form>
</body>[Related recommendations: javascript learning tutorial]
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