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Native js obtains dom elements in iframe--How parent and child pages obtain each other's dom elements from each other

高洛峰Original: 2017-02-06 09:33:411715browse

Use native js to get the elements of the iframe subpage on the parent page, and get the elements of the parent page on the subpage. This is a method that is often used. Here is an example to summarize:

1 , Parent page (demo.html), modify the background color of the sub-page div in the parent page to gray, originally red:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>demo主页面</title>
    <script type="text/javascript">
    window.onload = function(){
        var _iframe = document.getElementById(&#39;iframeId&#39;).contentWindow;
        var _div =_iframe.document.getElementById(&#39;objId&#39;);
        _div.style.backgroundColor = &#39;#ccc&#39;;
    }
     
    </script>
</head>
 
<body>
 
<div id=&#39;parDiv&#39;>父页面</div>
<iframe src="demo-iframe.html" id="iframeId" height="150" width="150"></iframe> 
</body>
</html>

2. Sub-page (demo-iframe.html), modify the parent page in the sub-page The font color of the page div is red, originally it was black:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>子页面demo13-iframe.html</title>
    <script type="text/javascript">
    window.onload = function(){
        var _iframe = window.parent;
        var _div =_iframe.document.getElementById(&#39;parDiv&#39;);
        _div.style.color = &#39;red&#39;;
    }
    </script>
</head>
 
<body>
    <div id=&#39;objId&#39; style=&#39;width:100px;height:100px;background-color:red;&#39;>子页面</div>
</body>
</html>

3. Rendering:

(1) Rendering without adding js:

Native js obtains dom elements in iframe--How parent and child pages obtain each others dom elements from each other

(2) Rendering after adding js:

Native js obtains dom elements in iframe--How parent and child pages obtain each others dom elements from each other

The above native js gets the dom elements in the iframe - the parent and child pages get each other's dom elements from each other The method is all the content shared by the editor. I hope it can give you a reference, and I also hope that everyone will support the PHP Chinese website.

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