Discuss the details after setting the src of iframe to about:blank_HTML/Xhtml_Webpage Production

After setting the src of the iframe to 'about:blank', if it is not set to "about:blank", the memory will not be released. You must also use iframe.document.write('');
in order to clear the content, but after this processing, there will still be about 500-1000K of memory left. This is the iframe bug of IE6. Dynamically created iframes always It will consume some memory.

Copy code

The code is as follows:

function clearIframe(id){
var el = document.getElementById(id),
iframe = el.contentWindow;
if(el){
el.src = 'about:blank';
try{
iframe. document.write('');
iframe.document.clear();
}catch(e){};
//The above can clear most of the memory and document node records
//Finally delete this iframe.
document.body.removeChild(el);
} } clearIframe('iframe_id');