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iframe内のコンテンツサイズに応じて、frameの高さを動的に変更する方法

Last updated at Posted at 2014-11-29

iframe内のコンテンツサイズに応じて、frameの高さを動的に変更する方法

docFrame.contentDocument.body.scrollHeight
でも
docFrame.contentWindow.document.body.scrollHeight
でもサイズ取得できた。contentWindowがw3c基準でない。

動作確認バージョン

  • IE9
  • Chrome 39.0
  • FireFox 33
aaa.html
<!DOCTYPE HTML>
<html>
<script type="text/javascript">
<!--
function change_frame_height(frm){
  var contentsHeight;
  var docFrame = document.getElementById(frm);
  try{
    contentsHeight = docFrame.contentWindow.document.body.scrollHeight;
  }catch(e){}
  if(!isNaN(contentsHeight) && !contentsHeight == 0){
    docFrame.height = contentsHeight;
  }else{
    docFrame.height = 120;
    docFrame.scrolling="auto"
  }
}
//-->
</script>
<head>
</head>
<body>
	<table border="3">
	<tr>
	<td>lt</td><td>ct</td><td>rt</td>
	</tr>
	<tr>
	<td>l</td>
	<td>
	<iframe id="newsframe" onLoad="change_frame_height(this.id)" 
		frameborder="0" width="100%" marginheight="0" 
		marginwidth="0" scrolling="no" src="bbb.html">
	</iframe>
	</td>
	<td>r</td>
	</tr>
	<tr>
	<td>lb</td><td>cb</td><td>rb</td>
	</tr>
	</table>
</body>
</html>
bbb.html
aaaa</br>
aaaa</br>
aaaa</br>
aaaa</br>
aaaa</br>
aaaa</br>
aaaa</br>
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