3.20.0

• New modes: Julia and PEG.js.
• Support ECMAScript 6 in the JavaScript mode.
• Improved indentation for the CoffeeScript mode.
• Make non-printable-character representation configurable.
• Add ‘notification’ functionality to dialog addon.
• Full list of patches.

3.19.0

• New modes: Eiffel, Gherkin, MSSQL dialect.
• New addons: hardwrap, sql-hint.
• New theme: MBO.
• Add support for line-level styling from mode tokenizers.
• Full list of patches.

3.18.0

Emergency release to fix a problem in 3.17 where .setOption("lineNumbers", false) would raise an error.

3.17.0

• New modes: Fortran, Octave (Matlab), TOML, and DTD.
• New addons: css-lint, css-hint.
• Improve resilience to CSS 'frameworks' that globally mess up box-sizing.
• Full list of patches.

3.16.0

• The whole codebase is now under a single license file.
• The project page was overhauled and redesigned.
• New themes: Paraiso (light), The Matrix.
• Improved interaction between themes and active-line/matchbrackets addons.
• New folding function CodeMirror.fold.comment.
• Added fullscreen addon.
• Full list of patches.

3.15.0

• New modes: Jade, Nginx.
• New addons: Tern, matchtags, and foldgutter.
• Introduced helper concept (context).
• New method: getModeAt.
• New themes: base16 dark/light, 3024 dark/light, tomorrow-night.
• Full list of patches.

3.14.0

• New addons: trailing space highlight, XML completion (rewritten), and diff merging.
• markText and addLineWidget now take a handleMouseEvents option.
• New methods: lineAtHeight, getTokenTypeAt.
• More precise cleanness-tracking using changeGeneration and isClean.
• Many extensions to Emacs mode (prefixes, more navigation units, and more).
• New events "keyHandled" and "inputRead".
• Various improvements to Ruby, Smarty, SQL, and Vim modes.
• Full list of patches.

3.13.0

• New modes: COBOL and HAML.
• New options: cursorScrollMargin and coverGutterNextToScrollbar.
• New addon: commenting.
• More features added to the Vim keymap.
• Full list of patches.

3.12.0

• New mode: GNU assembler.
• New options: maxHighlightLength and historyEventDelay.
• Added addToHistory option for markText.
• Various fixes to JavaScript tokenization and indentation corner cases.
• Further improvements to the vim mode.
• Full list of patches.

3.11.0

• Removed code: collapserange, formatting, and simple-hint addons. plsql and mysql modes (use sql mode).
• Moved code: the range-finding functions for folding now have their own files.
• Changed interface: the continuecomment addon now exposes an option, rather than a command.
• New modes: SCSS, Tcl, LiveScript, and mIRC.
• New addons: placeholder, HTML completion.
• New methods: hasFocus, defaultCharWidth.
• New events: beforeCursorEnter, renderLine.
• Many improvements to the show-hint completion dialog addon.
• Tweak behavior of by-word cursor motion.
• Further improvements to the vim mode.
• Full list of patches.