feat(drawer): add plain variant to section

[mcoker]

fixes #8317

Summary by CodeRabbit

• Style

  • Drawer section header plain styling now renders a transparent background consistently with other background modifiers.

• Documentation

  • Updated Drawer docs to reflect that the plain modifier applies to section elements and how the no-plain-on-glass exception behaves.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro

Run ID: 4606bde2-da61-40af-a6af-24591b036042

📥 Commits

Reviewing files that changed from the base of the PR and between c6fafdd and 2b0d655.

📒 Files selected for processing (2)

• src/patternfly/components/Drawer/drawer.scss
• src/patternfly/components/Drawer/examples/Drawer.md

🚧 Files skipped from review as they are similar to previous changes (1)

• src/patternfly/components/Drawer/drawer.scss

---

Walkthrough

Apply .pf-m-plain to Drawer section background rules so the section header background can be transparent under the same glass/root conditions previously gating .pf-m-no-background. Update example docs to document .pf-m-plain and .pf-m-no-plain-on-glass affecting the section element.

Changes

Cohort / File(s)	Summary
Drawer Section Styling src/patternfly/components/Drawer/drawer.scss	Add .pf-m-plain (and .pf-m-plain with .pf-m-no-plain-on-glass exceptions) to the selector that sets --pf-c-drawer__section--BackgroundColor: transparent, grouping it with the existing .pf-m-no-background case.
Drawer Documentation src/patternfly/components/Drawer/examples/Drawer.md	Update documentation examples to indicate .pf-m-plain and .pf-m-no-plain-on-glass also apply to the .pf-v6-c-drawer__section element (in addition to panel selectors).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related issues

• #8317: Drawer - add plain modifier to drawer section — PR implements adding .pf-m-plain to the drawer section as requested.
• Drawer - Glass style follow up patternfly-react#12273: Matches discussion on .pf-m-plain, .pf-m-no-plain-on-glass, and transparent background behavior for Drawer sections.

Possibly related PRs

• fix: make plain and no-plain-on-glass work together #8266: Alters Drawer SCSS selector logic for .pf-m-plain / glass-theme background handling; strongly related to the same selector adjustments.
• fix: change no-plain to no-plain-on-glass #8249: Adjusts Drawer SCSS plain/no-plain glass-theme selectors; overlaps with these selector changes.

Suggested labels

released on @prerelease``

Suggested reviewers

• thatblindgeye
• jcmill
• srambach

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title follows conventional commit format with 'feat' type and clear scope, accurately describing the main change of adding a plain variant to the drawer section.
Linked Issues check	✅ Passed	The code changes successfully implement the primary objective from issue #8317 by adding the .pf-m-plain modifier to drawer section styling and documentation.
Out of Scope Changes check	✅ Passed	All changes directly relate to the linked issue objective. Both SCSS and documentation modifications focus on implementing plain variant support for drawer sections.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[tlabaj]

lgtm

[patternfly-build]

Preview: https://pf-pr-8318.surge.sh

A11y report: https://pf-pr-8318-a11y.surge.sh

[patternfly-build]

🎉 This PR is included in version 6.5.0-prerelease.71 🎉

The release is available on:

• GitHub release
• npm package (@prerelease dist-tag)

Your semantic-release bot 📦🚀