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Contributing Guide

Add a new feature

  1. Create a new Markdown file inside the _features folder. You can duplicate the existing _template.md file for an existing model.

If your test concerns an HTML element or attribute, use a html- prefix. If it concerns a CSS feature, use a css- prefix.

// Do's
_features/html-background.md
_features/css-background.md

// Don'ts
_features/background.md
  1. Create a test file inside the tests folder. Name your file with the same name you used for the Markdown data file.
// Example
tests/html-background.html

A test should include variations of the feature tested to get the best possible understanding of the actual support. For example, if you test a CSS property, try to include a test in both an inline style and an embedded <style> element, and try different values for the property as well.

A test should be easy to read. Use red and green background colors to easily get a glimpse of support or non support.

  1. Test. Please consider the two followings methods of testing:
  • Use actual Matrix Clients and devices. This is the best way to test, especially for webmails where it's easy to inspect the code and see what's going on.
  • Use an online screenshots service (like Litmus, Email on Acid or Testi.at).
  1. Fill in the results inside the Markdown file created at step 1. Here's an overview of the different fields inside that file:
  • title: The name of the feature tested. Make it short and concise. Use element, attribute or property at the end of the title.
// Do's
<section> element
background attribute
CSS background property

// Don'ts
HTML section tag
HTML background

  • description: A sensible description of the feature. This can contain the actual name of code feature tested. (For example, font-size.)

  • category: html or css, in lowercase.

  • last_test_date: The date of the last update in that file. This is useful to sort features by last update on the homepage of the site.

  • test_url: The relative URL to the test file created in the tests folder. (For example, /tests/html-role.html.)

  • test_url_results: A full URL to tests results on an online screenshots service. Make sure this link is accessible for anyone without an account. (For example, https://app.emailonacid.com/app/acidtest/ABCDEF/list.)

  • stats: The actual support data. Stats are organized on three levels deep:

    • Family: the general brand or naming of the Matrix Client. (For example: outlook, gmail, apple-mail.) This is used as a key for sorting and display purposes, so make sure to use the matching key you can find in the _data/nicenames.yml file.

      • Platform: the platform of the Matrix Client. (For example: desktop-webmail, windows, macos). Once again, make sure to use the matching key name you can find in the _data/nicenames.yml file. For better readability, exceptions can be added in naming here. For example, the mobile webmail of the Outlook family is specifically named Outlook.com, so we use a outlook-com platform key.

        • Version: the version number or name of the Matrix Client. If the version is unknown (for example for webmails or mobile applications), a date in the format of YYYY-MM is prefered.

        Each version has then a value indicating the support level (following Can I use's own values):

          * `y` ("*yes*"): Supported. This should result in a green cell.
  * `n` ("*no*"): Not supported. This should result in a red cell.
  * `a` ("*almost*"): Mitigated support. This value should be used if the support depends on specific conditions or hacks.  This should result in an orange cell.
  * `u` ("*untested*"): Not tested. This should result in a grey cell.

        Notes references can be added on each cell by using a # symbol preceeded by a space and the corresponding key value of the note (see notes_by_num below).

    // Example
"2019-06":"a #1 #2"

    Versions will be displayed by the order they're in. Make sure to go from the oldest version to the most recent version.

  • notes: Global note regarding all Matrix Clients for this feature.

  • notes_by_num: Specific notes for individual Matrix Clients. Each note consists of a key string and a value string. Multiple notes can be added by using a comma separator after each value. The key should match the notes added in the stats values. It's prefered to add numbers for the keys.

// Example
"notes_by_num": {
    "1": "X value is not supported.",
    "2": "Y value is not supported."
}