Eurofox 🇪🇺 🔥 🦊

Firefox plugin to automatically translate ° Fahrenheit, weights, speed and size measurements into european units. To see the original value, hover over the measurement.

Before:

After:

The numbers are rounded for easier reading, so don't expect exact values. The plugin will not work (yet) for values which are spelled out as words instead of numbers (such as one mile instead of 1 mile).

To check if the installation works in your browser, please navigate to the test page.

Supported units:

• Temperature (Fahrenheit to Celsius)
• Sizes (inch, foot, yard, miles)
• Weights (stone, pound)
• Areas (acres, square miles)
• Speeds (mph, knots)
• Liquids (barrel, gallon)

TODOs

• BUG: broken test for inches (see https://regex101.com/r/WO25Zd/2 )
• BUG: exclusion of style tags doesn't work anymore
• WIP: DOM mutation observer - how to avoid endless recursion?
• BUG: multiple edge cases on the test page
• ESLint issue with "broken" regex
• exclude form inputs & text areas from conversion?
• add missing unit tests for yard, miles, acres and edge cases from test page
• github protect main branch
• convert units for cooking (pint, cup, quart, various spoons and ounces)
• maybe replace jquery with pure js
• make ESLint more strict
• remove console output
• explain demo page and add screenshots of expected outcomes
• maybe ignore invisible nodes (css display/visibility)
• add integration tests
• add options to exclude domains
• maybe support spelled out numbers, like nine inch nails in addition to 9 inch nails
• add config option for css for the replacement span, such as background colour
• add button to activate / deactivate in toolbar
• test in chrome
• publish

Notes for development

• run npm test for unit tests, or make test.
• Regexes:
  • temperature in ecma and the original in pcre
  • inches https://regex101.com/r/WO25Zd/2
  • feet https://regex101.com/r/xVnj9A/3
  • miles https://regex101.com/r/qAti0n/2
  • mph https://regex101.com/r/8AvYcc/1
• for converting regexes from pcre => ecma: npm install regex-translator; npx regex-translator -o -T ecma -F pcre -R "(° ?)?\d+(\.\d+)?+°?+ ?[fF]"
• more units up for convertion at
  • wiki/United_States_customary_units
  • wiki/Category:Imperial_units
  • british fun
• fun fact: I'm not a frontend dev, I don't really know what I'm doing. Apologies.