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Joe McGill 1bda0a6e2e Media: Ensure empty alt attributes are set to blank strings.
This is a follow up to [38065] to ensure that `wp.html.string()` always
converts empty `alt` attributes to `alt=""` rather than returning HTML using
empty attribute notation, like `alt`. This allows screen readers to ignore
images with empty `alt` attributes, rather than reading out the URL string.

Additionally this completely removes the logic in `wp.html.string()` for
converting blank attributes to empty attribute notation since empty attribute
notation is generally meant to denote a boolean value, e.g.,
`checked` == `checked="checked"`, which doesn't apply in this context because
boolean attributes must be omitted in order to represent a `false` value.
See: https://www.w3.org/TR/html5/infrastructure.html#boolean-attributes

Props adamsilverstein, afineman, joemcgill.
Fixes #36735.

git-svn-id: https://develop.svn.wordpress.org/trunk@38116 602fd350-edb4-49c9-b593-d223f7449a82
2016-07-20 14:37:24 +00:00
src Media: Ensure empty alt attributes are set to blank strings. 2016-07-20 14:37:24 +00:00
tests Tests: Include the check_comment function tests in the comment group. 2016-07-20 14:06:44 +00:00
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.editorconfig Use HTTPS URLs for codex.wordpress.org. 2015-04-12 21:28:58 +00:00
.gitignore Remove accidental .svn addition to .gitignore 2015-12-12 18:26:22 +00:00
.jshintrc Build: Prevent non-breaking spaces from accidentally being inserted into JavaScript files. 2015-11-12 12:04:55 +00:00
.travis.yml Output node and npm versions on travis 2016-06-16 17:27:22 +00:00
Gruntfile.js Grunt: when running precommit use regex to check which files have been modified. 2016-06-19 12:31:15 +00:00
package.json Tools: Update grunt-patch-wordpress to 0.4.2. 2016-07-20 06:48:26 +00:00
phpunit.xml.dist Set a whitelist for PHPUnit code coverage. 2016-05-17 20:22:57 +00:00
wp-cli.yml Remove debug mode from WP-CLI by default, as it now outputs too much debugging information to be of use during normal development. 2015-11-28 18:36:06 +00:00
wp-config-sample.php Lightly clean up and improve inline documentation in wp-config-sample.php. 2015-05-10 00:05:30 +00:00
wp-tests-config-sample.php Unit Tests: Correct comment in wp-tests-config-sample.php. 2016-01-21 20:24:12 +00:00