Static resource won't refresh

Question

I have a static resource with is a Javascript file of about 1mb. After successfully uploading the file, and clearing the cache of the page that uses the static resource, it's still using the old javascript file. Tried it 5+ times, still doesn't work.

Anybody know why it might be the case?

I'm workin in: https://c.na30.visual.force.com

Answer 1

The URL of a static resource automatically includes the timestamp when it was last updated providing you access it via $Resource (and similarly $Resource for Lightning) and this ensures that the static resource is re-cached at the client-side when it changes.

Use this mechanism in your logic.

Since $Resource doesn't work in communities, you can create the equivalent URL yourself via querying the static resource's LastModifiedDate:

    for (StaticResource sr : [
                select LastModifiedDate
                from StaticResource
                where Name = :name
                order by CreatedDate desc
                limit 1
                ]) {
        return '/resource/' + sr.LastModifiedDate.getTime() + '/' + name;
    }
enter code here

Another option is to have current date in Javascript like following

'/resource/'+Date.now()+'/staticResource'