Found a bug?

If you find a bug/issue in the source code or a mistake in the documentation, you can help us by creating an issue here on GitHub. Please provide an issue reproduction. Screenshots are also helpful.

You can help the team even more and submit a pull request with a fix.

Want a feature?

You can request a new feature also by creating an issue.

  • For a major feature (e.g. a new component), first open an issue and outline your proposal so that it can be discussed before you start with the implementation. Screenshots are helpful. If there is an agreement that this feature should be part of the Barista components library, either you or the team will take this issue, create an API proposal, implement it and submit a pull request.
  • Small features can be crafted and directly submitted as a pull request.

Submitting a pull request

Before you submit your pull request (PR) consider the following guidelines:

  • Search GitHub for an open or closed issue or PR that relates to your submission.
  • Fork barista into your namespace by using the fork button on github.
  • Make your changes in a new git branch: git checkout -b my-fix-branch master
  • Create your patch/fix/feature including appropriate tests.
  • Test your changes with our supported browsers.
  • Follow our coding standards.
  • Document all public API methods and properties.
  • Run unit, UI and universal tests, as described in the developer documentation, and ensure that all tests pass.
  • Commit your changes using a descriptive commit message that follows our commit message conventions.
  • Push your branch to GitHub.
  • Create a new pull request from your branch against the dynatrace-oss:master branch.
  • The PR reviewers will be added depending on the owners-file or can be added optionally.
  • If we suggest changes then:
    • Make the required updates.
    • Re-run all tests to make sure they are still passing.
    • Rebase your branch and force push to the repository (this will update your pull request):
      git rebase master -i
      git push -f

PR approved – and now?

Once your pull request is approved and ready to merge, it gets marked as pr:merge-ready and your work is done. The PR will be merged into master by repository administrators (assignee).

If the PR contains a patch or bug fix, it is released with the next version of the Barista components library.

If the PR contains a breaking change, it is released with the next major version upgrade.

Commit message guidelines

Each commit message consists of a type, scope and subject (message).
The type and subject are mandatory, the scope is optional in some specific cases. Format: <type>(<scope>): <subject>


Must be one of the following:

  • feat: A new feature
  • fix: A bug fix
  • docs: Documentation only changes
  • style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
  • refactor: A code change that neither fixes a bug nor adds a feature
  • perf: A code change that improves performance
  • test: Adding missing tests or correcting existing tests
  • ci: Changes that affect the CI
  • build: Changes that affect the build system like npm scripts or angular-cli related changes
  • chore: Other changes that don't modify src or test files
  • barista: Changes that affect the design system app/build
  • ds: Changes that affect the design system app/build


The scope could be anything specifying the place of the commit change, in most cases this would be the component name. For example select, button, etc.


The commit message should describe the problem it solves or the feature it introduces. Not the changes you have done. Furthermore the commit message has to start with an uppercase letter and ends with a stop.

The body should include the motivation for the change and contrast this with previous behavior.

The footer should contain any information about Breaking Changes and is also the place to reference GitHub issues that this commit closes.

Breaking Changes should start with the word BREAKING CHANGE: with a space or two newlines. The rest of the commit message is then used for this.


feat(filter-field): Added node removal on backspace.
fix(button): Fixes an issue where theming was not applied initially.

Closes #28
perf(filter-field): Removed deprecated sorting input for better performance.

BREAKING CHANGE: The sorting input has been removed. The default sorting is used for performance reasons.

Breaking changes

Breaking changes can not always be avoided, so if you have to do one, consider the following guidelines:

  • If possible, deprecate and mark as a breaking change for the next (future) major release. Example:
      // @deprecated Use `DT_SOME_OTHER_OPTION` instead.
      // @breaking-change 2.0.0 To be changed to `DT_SOME_OTHER_OPTION`
      export const DT_SOME_OPTION = {};
  • If you cannot deprecate, apply this breaking change, and commit it with the BREAKING CHANGE label (all uppercase) and a description in the commit message footer (see Commit message footer section)!

PR workflow


Open PR

A developer opens a PR in one of two ways:

  1. The PR is already finished and can directly be reviewed.
  2. The PR is still wip and is opened for others to be tracked. In this case the PR has to have the pr: wip and/or has to be opened as a Draft.


After the work on this draft/wip PR has been finished, remove the label pr: wip and click the button Ready for review if it was opened as a Draft to flag it for the codeowners/admins to review.


Now the review process kicks in. Depending on the scope of the PR one or more codeowners must review this PR before the process can be continued (in most cases at least 2 codeowners will review and approve).

  1. If we suggest changes to the code, the label pr: needs-changes will be applied. Now the developer has to apply this changes before the review will be done again.
  2. If the code is ok, but something has to be done with the commit message (this would typically be a rebase if the commits need to be squashed, or just a simple reword to make the commit fit our guidelines) the label pr: needs-rebase will be applied. Also the reviewer has to provide additional guidance on what has to be done.
  3. If the code and the commits are ok - the PR is ready to be merged.


After all the required codeowners (one or more; in most cases at least two), the last reviewing codeowner will apply the label pr: merge-ready and assign the PR to himself as a "caretaker". The caretaker is now responsible to wait for the labeler to run and check whether the correct target labels depending on the scope and type of the PR have been applied. If these are fine, the caretaker will now merge the PR, and check whether the cherry-picker picks the commit(s) to the correct release branches.