Pull Request for Issue # .

Summary of Changes

• Move tools and source JS to ESM
• ES6 files have now the extension .mjs (used to be .es6.js)
• Web Components also have .mjs extension (used to be .w-c.es6.js)
• The build/media_source/system/js/joomla-core-loader.mjs file now includes the required css and the related build/media_source/system/scss/joomla-core-loader.scss is deleted

Testing Instructions

You need Git and NPM to test this

Pull the 4.4-dev branch and run:

• npm install
• npm run gzip
• npm run versioning
• Store the media folder somewhere outside of the joomla-cms folder

Pull this PR gh pr checkout 43779 and run:

• npm install
• npm run gzip
• npm run versioning
• Store the media folder somewhere outside of the joomla-cms folder

Compare the two folders. The only difference should be the missing files: media/system/css/joomla-core-loader.css, media/system/css/joomla-core-loader.min.css, media/system/css/joomla-core-loader.min.css.gz

Check that basic backend functionality

Actual result BEFORE applying this Pull Request

Expected result AFTER applying this Pull Request

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

@Fedik @richard67 could you please test this one (pretty hard for the average tester)?

@LadySolveig @bembelimen please DO NOT upmerge this, I will do a PR on the 5.1 instead