- <script id="greeting" type="x-deferred-script">
- alert("this is my script - it's eval'd on demand");
Script Islands are useful in the following situations:
- With a single-page application (SPA) like TiddlyWiki, where all the code is inside the HTML file. Each of the script islands is a separate module, and a microkernel is responsible for loading the scripts according to different rules. For example, the scripts might contain “depends” attributes to declare they depend on other scripts, so the microkernel sequences the script loading. Or another scenario might be that the user has some control over which scripts get loaded; instead of deleting the other scripts from the file, you keep them around in case the user wants to repackage the SPA, with a different set of scripts.
BTW I originally used <script src=""> to trick the browser into not evaluating the script tag’s innerHTML. Thanks to Jeremy for coming up with the more elegant alternative of a type=x-tiddler (which I stated above in the more generic form type=x-deferred-script).