jQuery Cache Busting Forces Half Megabyte Download on Every Mirador Load

[miqrogroove]

Unresolved problem described in #1551, which has been closed, still needs work.

jQuery cache busting used when loading the overlay resources. For example, on every click of a thumbnail for the Mirador viewer, the browser is required to perform an ajax request for a half megabyte file named mirador.js. This causes an unnecessary delay in rendering even on faster connections. The Universal viewer implementation doesn't seem to have the same bug.

[miqrogroove]

Workaround

Add this statement:

jQuery.ajaxSetup({ cache: true });

Before this statement:

providence/assets/ca/ca.genericpanel.js

Lines 103 to 107 in e27068a

	jQuery('#' + that.panelContentID).load(url, postData, that.closeButtonSelector ? function() {
	jQuery(that.closeButtonSelector).click(function() {
	that.hidePanel();
	})
	} : null);

I don't know if this would break anything in other areas of CA. jQuery documentation shows cache is normally true, but there is a built-in exception for script requests. If this setting is a proper boolean, it's unclear how setting it to the default value even changes anything.

[miqrogroove]

This was possibly fixed in Pawtucket already. I can reproduce this only in Providence.