The following are external libraries that have been updated during the 4.6 release cycle.

Masonry

Masonry was updated to version 3.3.2 from version 3.1.4 (#32802). Notable changes:

• jQuery events are now triggered.
• CommonJS is supported.
• Percentages can now be used for horizontal positions.
• Various browser compatibility issues are now resolved.

Full Changelog: https://github.com/desandro/masonry/releases

imagesLoaded

imagesLoaded was updated to version 3.2.0 from version 3.1.4 (#32802). Notable changes:

• Background images are now supported.
• setTimeout no longer triggers multiple events errantly.
• Internal cache has been removed. Each image will now be checked.
• Various browser compatibility issues are now resolved.

Full Changelog: https://github.com/desandro/imagesloaded/releases

NOTE: imagesLoaded and Masonry are now in separate files. This means that imagesLoaded can be enqueued without Masonry being enqueued. For backward compatibility reasons, imagesLoaded remains a dependency for Masonry.

MediaElement.js

MediaElement.js was updated to version 2.22.0 from version 2.18.1 (#36759, #37363). Notable changes:

• Several YouTube embed issues have been resolved.
• More Vimeo APIAPI An API or Application Programming Interface is a software intermediary that allows programs to interact with each other and share data in limited, clearly defined ways. support added.
• A few a11yAccessibility Accessibility (commonly shortened to a11y) refers to the design of products, devices, services, or environments for people with disabilities. The concept of accessible design ensures both “direct access�? (i.e. unassisted) and “indirect access�? meaning compatibility with a person’s assistive technology (for example, computer screen readers). (https://en.wikipedia.org/wiki/Accessibility) and i18ni18n Internationalization, or the act of writing and preparing code to be fully translatable into other languages. Also see localization. Often written with a lowercase i so it is not confused with a lowercase L or the numeral 1. Often an acquired skill. issues have been fixed.
• General stability enhancements.

Full Changelog: https://github.com/johndyer/mediaelement/blob/2.22.0/changelog.md

TinyMCE

TinyMCE was updated to version 4.4.1 from version 4.3.10 (#37225, #37327, #37476). Notable changes:

• Various contentEditable bugs fixed.
• Various browser compatibility bugs fixed.
• General stability and performance enhancements.

Full Changelog: https://github.com/tinymce/tinymce/blob/4.4.1/changelog.txt

Backbone.js

Backbone.js was updated to version 1.3.3 from 1.2.3 (#37099). Notable changes:

• 4 major regressions were fixed.
• Added findIndex and findLastIndex Underscore methods to Collection.
• Added options.changes to Collection “update�? event which includes added, merged, and removed models.
• Removed component package support.

Full Changelog: https://cdn.rawgit.com/jashkenas/backbone/1.3.3/index.html#changelog

#4-6, #dev-notes, #external-libraries