Does the step use your own action?
There is a function in action toolkit > core library to wrap chunks of output in foldable groups. You could use it in your JavaScript Action.

const core = require('@actions/core')
// Manually wrap output

core.startGroup('Do some function')

doSomeFunction()

core.endGroup()
// Wrap an asynchronous function call

const result = await core.group('Do something async', async () => {

const response = await doSomeHTTPRequest()

return response

})

That is pretty neat! but not as of now I’m not using my own action, If I do however this is a great tip!

Tried this and it worked pretty much as expected. I would have loved to have the options of having groups inside groups but besides that that feature is great!

The output its now readable 😃

Thank you!

One little thing would be to add an example to the documentation, it did not take long to figure out but might help the next dev.

Something like:

Grouping output

::group::{Group Heading}
::endgroup::

Creates a group that is expandable in the output, multiple lines can be grouped under a heading

example:

echo "::group::Group Heading"
echo "This will be inside the group"
echo "Second line inside the group"
echo "::endgroup::"