Does JSONP scale? How many JSONP requests can I send?
- by Cheeso
Based on Please explain JSONP, I understand that JSONP can be used to get around the same-origin policy.
But in order to do that, the page must use a <script> tag.
I know that pages can dynamically emit new script tags, such as with:
<script type="text/javascript" language='javascript'>
document.write('<script type="text/javascript" ' +
'id="contentloadtag" defer="defer" ' +
'src="javascript:void(0)"><\/script>');
var contentloadtag=document.getElementById("contentloadtag");
contentloadtag.onreadystatechange=function(){
if (this.readyState=="complete") { init(); }
}
</script>
(the above works in IE, don't think it works in FF).
... but does this mean, effectively, that every JSONP call requires me to emit another <script> tag into the document? Can I remove the <script> tags that are done?
