Technical review: Add doc for CSS progress() function

[chrisdavidmills]

Description

Chrome 138 adds the CSS progress() function — see https://chromestatus.com/feature/5112558941634560.

This PR adds docs for the progress() function.

Note: The final demo code snippets are out of sync with the version available in the dom-examples repo. You can find the latest updates added in this PR: mdn/dom-examples#314. I'll keep it open until the reviews are done, in case there are further changes to make.

Motivation

Additional details

Related issues and pull requests

[github-actions]

Preview URLs

• /en-US/docs/Web/CSS/CSS_Values_and_Units/CSS_Value_Functions
• /en-US/docs/Web/CSS/CSS_Values_and_Units
• /en-US/docs/Web/CSS/progress

Flaws (1)

Note! 2 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/CSS/progress
Title: progress()
Flaw count: 1

• broken_links:
  • /en-US/docs/Web/CSS/CSS_values_and_units is ill cased

External URLs (1)

URL: /en-US/docs/Web/CSS/progress
Title: progress()

• https://mdn.github.io/dom-examples/css-progress/ (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2025-08-04 14:25:53)

[github-actions]

This pull request has merge conflicts that must be resolved before it can be merged.

[github-actions]

This pull request has merge conflicts that must be resolved before it can be merged.

[github-actions]

This pull request has merge conflicts that must be resolved before it can be merged.