JavaScript 根据内容调整iframe高度

Posted 2021-05-20

<script type="text/javascript">
	
		//Input the IDs of the IFRAMES you wish to dynamically resize to match its content height:
		//Separate each ID with a comma. Examples: ["myframe1", "myframe2"] or ["myframe"] or [] for none:
		var iframeids=["iframe"]
		
		//Should script hide iframe from browsers that don't support this script (non IE5+/NS6+ browsers. Recommended):
		var iframehide="no"
		
		// The added height to add to the iframe, helps further prevent scrollbars when resizing the contents
		var extraHeight = 35;
		
		function resizeCaller() {
			var dyniframe=new Array()
			for (i=0; i<iframeids.length; i++){
				if (document.getElementById)
					resizeIframe(iframeids)
				//reveal iframe for lower end browsers? (see var above):
				if ((document.all || document.getElementById) && iframehide=="no"){
					var tempobj=document.all? document.all[iframeids] : document.getElementById(iframeids)
					tempobj.style.display="block"
				}
			}
		}
		
		function resizeIframe(frameid){
			var currentfr=document.getElementById(frameid)
			if (currentfr && !window.opera){
				currentfr.style.display="block"
				if (currentfr.contentDocument && currentfr.contentDocument.body.offsetHeight) //ns6 syntax
				{	currentfr.height = currentfr.contentDocument.body.offsetHeight+extraHeight; }
				else if (currentfr.Document && currentfr.Document.body.scrollHeight) //ie5+ syntax
				{	currentfr.height = currentfr.Document.body.scrollHeight+extraHeight;	}
				if (currentfr.addEventListener)
					currentfr.addEventListener("load", readjustIframe, false)
				else if (currentfr.attachEvent){
					currentfr.detachEvent("onload", readjustIframe) // Bug fix line
					currentfr.attachEvent("onload", readjustIframe)
				}
			}
		}
		
		function readjustIframe(loadevt) {
			var crossevt=(window.event)? event : loadevt
			var iframeroot=(crossevt.currentTarget)? crossevt.currentTarget : crossevt.srcElement
			if (iframeroot)
				resizeIframe(iframeroot.id);
		}
		
		function loadintoIframe(iframeid, url){
			if (document.getElementById)
				document.getElementById(iframeid).src=url
		}
		
		if (window.addEventListener)
			window.addEventListener("load", resizeCaller, false)
		else if (window.attachEvent)
			window.attachEvent("onload", resizeCaller)
		else
			window.onload=resizeCaller
		
	</script>