Question

I am working with a page that contains two frames. Each frame calls a page that then calls the same javascript file in a script tag. It appears that sometimes the browser will have cached the js file by the time the other frame makes its call, thus grabbing it from the cache. But, it appears that sometimes it downloads 2 copies, one for each frame. I’m trying to figure out if it would be worth calling the script once from the parent page and have each frame’s page access it that way. So is it just a matter of how fast the browser happens to download the js file, if the other frame will grab it from the cache? What’s the normal protocol for the major browsers on this?

Thanks for the help!

Answer 1

You can have the script look to see if it has any child iframes on the page, if it does, dynamically add a script block to the child document (with the same SRC). This way the main one will ALWAYS load first and the children will always use the cache.