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Icon Checker

tools/resources/icon_checker/README.md

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Icon Checker

Validates icon names in HTML files against Google Fonts naming.

Usage

Used in presubmits to ensure icons match Google Fonts names. Applies to files in:

  • chrome/browser/resources
  • components/vector_icons
  • ui/webui/resources

Triggers

The icon checker presubmit is triggered automatically when you upload or commit changes that affect:

  1. HTML or TypeScript files in chrome/browser/resources or ui/webui/resources that contain a cr-iconset element. The checker scans these files for <g id="icon-name"> tags and extracts the icon names.
  2. New .icon files added to components/vector_icons. The checker uses the filename as the icon name.

In both cases, the extracted icon names are compared against a known list of valid Material Symbol names stored in icon_list.json. If a name does not match, a warning is issued to ensure consistency with Google Fonts naming conventions.

How to Update

Run to update icon_list.json from Google Symbols API:

bash
python3 tools/resources/icon_checker/update_icon_list.py