Add javascripts to CMS in SS4?

Questions
1

Silverstripe Version:
4+
Question:
In SS3, tihs is how I add js to the CMS

LeftAndMain::require_javascript('path_to/js'); // in _config.php

How do I do this in SS4? PS: require_javascript is no longer available.

Thanks in advance!

2

You should be able to use the LeftAndMain::$extra_requirements_javascript config variable to require extra JS. There’s an example here but it’s marked as deprecated due to the gradual move to React.

3

I think what’s being deprecated is the use of entwine, but using extra_requirements_javascript is still valid.

4

Thanks guys, I’ve found it the other day right after I asked the question (couldn’t withdraw the post, because I couldn’t find it - I guess there must be some caching mechanism behind)

this is how I added into mysite.yml

SilverStripe\Admin\LeftAndMain:
  extra_requirements_javascript:
    - '/resources/cms-js/cms.js'
5

Glad you sorted it. Your post was flagged for review (maybe because it was your first post?) so that’s probably why you couldn’t find it!

6

Doing this will not work if you run your project in a subfolder, since you’re using a path relative from the site root. Instead it would be better to use the “expose configuration” and use a module relative path, e.g.

SilverStripe\Admin\LeftAndMain:
  extra_requirements_javascript:
    - 'mycompany/myproject: cms-js/cms.js'