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Web resources allow you to include JavaScript and CSS resources into certain contexts, for example:

You can read more about web resource modules for JIRA and Confluence.


Web resources need to be loaded either from a plugin, or from specified directories. You can provide a list of directories using the system property plugin.resource.directories. It makes sense to use the default scripts directory, which is automatically created in your application "home" directory.

If you do this you can modify your setenv.sh (or .bat) script like so:

JVM_REQUIRED_ARGS='-Dplugin.resource.directories=/app/home/scripts -Dother.properties...'

You can provide multiple, comma-delimited directories if you want, in which case the resource loader will search them in order until it finds a matching file.


There is no negative performance impact to doing this…​ when the resource is found, it is cached.

Which means that you cannot change your resource and have it instantly reloaded. After changing the resource, you need to edit the web-resource item in the UI, and update, then hard refresh in your browser.

This is not the case when running with -Datlassian.dev.mode=true, in which case reloading should just "just work". Which means you should work on your web resources in a dev environment, then transfer them to your production environment when you are finished.

Modifying CSS

Let’s take as an example the task of modifying the CSS only on . A better example would be to wire up the buttons of a custom dialog using a JavaScript resource but let’s start simple.

Go to Admin → Script Fragments → Install Web Resource. Configure the form to look like this:

web resource

Clicking Preview or Update will give you an error at this point, as you have not yet created the resource: test-resources/red-blogposts.css.

In a text editor, create this directory and file under one of the directories you have defined in plugin.resource.directories…​ if you took the advice above then this would be <app.home>/scripts. Enter the contents:

body {
    color: red !important

Now return to the page and click Update. If you still get an error make sure you also create the directory test-resources.

red blog post

Injecting JavaScript into a specific context

You can inject JavaScript into a specific context. The example below will show how to log to the console when accessing admin pages.

  1. Copy and paste the snippet below in a text editor.

    console.log("Javascript in admin page context");
  2. Save the text editor file as console-log.js under one of the directories you have defined as a resource directory in plugin.resource.directories.

  3. Go to Admin > Script Fragments > Install Web Resource.

  4. Configure the form to look like this:

    console log web resource
  5. Click Preview to see your valid result, which you can see in the above image.

    If you receive an error, make sure the file name and provided Resources name is the same.

Result: As you can see in the image below, the console shows the message Javascript in admin page context after accessing an admin page.

console log admin page
A more complicated example would be to wire up the buttons of a custom dialog using a JavaScript resource.

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