Katex

Added
- Unicode: °, delimiters, 1D400-1D7FF, \ll, \lll, ≘≙≚≛≝≞≟, Unicode Mathematical Alphanumeric Symbols, ⟂ ¬ ⊨ ‼ ∌ ≲ ⩽ ⪅ ≶ ⋚ ⪋, corner (1203, 1207, 1260, 1273, 1274, 1232, 1377, 1389, 1459)
- \yen support on text mode (1208)
- \( (1213)
- Add defineSymbol to the main katex object (1263)
- Capital Greek letters (1283, 1285)
- Add version to katex object (1279, 1475)
- \copyright, \textregistered, \textcircled (1073)
- Tilde \textasciitilde (1286)
- Line breaks for inline formulas (1287)
- \hline (1306)
- Top-level \newline and \\ in inline math (1298)
- Strict mode, unicode text in math mode (1117, 1278)
- Strict setting for \newline display-mode behavior (1314)
- Allow all Unicode symbols in nonstrict mode (1217)
- \tag, \tag*, and \gdef (1309)
- \def, \gdef, and \global\def (1348, 1425)
- Change default maxExpand limit to 1000 (1383)
- \cfrac (1392)
- \arraystretch as a macro definition (1381)
- Add ability to create a dashed vertical line in arrays, using ':' (1395)
- \widecheck (1406)
- \hdashline (1407)
- \newcommand, \renewcommand, \providecommand (1382)
- Add a utility function (setFontMetrics) to extend builtin fontMetrics (1269)
- \oiint and \oiiint (1430)
- Remove `match-at` dependency, use RegExp for lexer (1447)
- \brace and \brack (1453)
- Allow only allowed protocols in \href (1440)
- \genfrac and \above (1455, 1458)
- \char character escaping and nicer MathML via \htmlmathml (1454)
- \binrel (1487)
- \pmb (1418)
- KaTeX website & documentation (1484, 1515, 1518, 1514, 1526, 1516, 1519, 1527, 1564, 1566, 1584)
- Improve supported functions documentation (1511, 1517, 1532, 1533, 1576, 1556, 1580, 1602)
- Alpha sorted function support page (1536)
- MediaWiki (texvc) (1558)
- Add ignore option for class names in auto-render (1555)
- ScrollSpy for table of contents in the documentation (1557, 1567, 1568)
- Build ECMAScript modules (1479, 1622)
- Enable environment variable USE_TTF to disable bundling TTF fonts (1600)
- List of KaTeX users (1569, 1579)

Changed
- Port to flow: delimiter, spacingData, unicodeSymbols, buildHTML, buildMathML, parseNode, defineFunction (1177, 1195, 1206, 1239, 1247, 1276, 1312, 1324, 1361, 1373, 1393, 1386, 1387, 1408, 1478, 1486, 1534, 1541, 1542, 1551, 1552, 1554, 1559, 1606, 1609, 1612, 1637)
- Online screenshot diff/generation using CircleCI (1187)
- Add display/displayMode toggle on test page (1193)
- Change CDN links (1243)
- Changelog for KaTeX (1322)
- Move test helpers into common modules (1318)
- Move function handlers to functions/ (1323, 1325, 1328, 1329, 1331, 1327, 1334, 1339, 1349, 1359, 1332, 1335)
- Add regenerate option to the screenshotter (1220)
- Upgrade to webpack 4 (1337, 1435)
- Automatic submodule updating via husky tool (1391)
- Refactor test helpers (1336)
- Change build directory to `dist` and cleanup NPM scripts (1500, 1610)
- Switch from nomnom to commander (1496)
- Add test job to CircleCI (1235)
- Switch npm to Yarn (1522, 1528)
- Improve release script & enable versioning documentation (1521, 1603)
- Enable stylelint-config-standard, lint CSS files (1575)
- Rename Screenshotter -> screenshotter (1573)

Fixed
- Fix nested math mode in non-default text mode (1111)
- Fix contenteditable mode (1179)
- Work around negative space bug in Chrome (1194)
- Fix \nobreakspace (1200)
- Fix instant mode switching for $, \(, \text (1213)
- Add metrics for \S and \P (1224)
- Fix anchor.toMarkup (1246)
- Specify height for SVG elements (1252)
- Include Bold-Italic fonts for \boldsymbol (1257)
- Fix space width in \texttt (1261)
- Fix \underset (1277)
- Remove special \verb space handling now that space is in Typewriter-Regular (1258)
- Switch makeGlue from .mord .rule to .mspace (1295)
- Fix ~ in \verb (1286)
- Stop throwing ParseError when throwOnError is false (1169, 1302, 1308)
- Fix extensible arrow sup vertical alignment (1256)
- Adjust \underset alignment and spacing (1290)
- Revert frac-lines and \rule to borders (min-height) (1249, 1417, 1594)
- Fix vertical alignment of \underbrace (1304)
- Use one strut instead of two (1307)
- Fix MacroExpander space handling (1314)
- Cleanup MathML <mrow>, <mtext>, <mn> (1338)
- Fix lap vertical alignment. (1162)
- Fix nested \tfrac (1370)
- Fix \coloneq etc (1372)
- Fix wide character spacing (1371)
- Fix auto-render \\[…] bug (1375)
- Rewrite spacing commands as macros (1156)
- Enable output modules to be used in browser or Node (1401)
- Add vertical kern to \vdots (1402)
- Implement \neq and \notin via macros like LaTeX's (1400, 1499)
- Improve \cancel (1398)
- Fix ligatures vs. \tt (1379)
- Implement \colon as amsmath does (1410)
- Automatic mrel/mbin spacing for \boldsymbol (1388)
- Phantom text (1449)
- Fix arrowheads for mhchem <--> (1451)
- Set `documentFragment.style` to empty object (1471)
- Remove tree cloning before building HTML (1470)
- Fix \operatorname to support general math functions (1461)
- Use \not character without left side-bearing correction (1267)
- Remove codes that require expensive polyfill (1469, 1563, 1591, 1597)
- Fix \not vertical alignment (1497)
- Comments without terminating newlines, \href fixes, \url support (1529)
- Fix \textdaggerdbl (1539)
- Fix \neq (1548, 1574)
- Fix wide characters (1549)
- Fix \fbox (1550)
- Fix \Large roots (1485)
- index.html: replace font, make responsive, improve demo (1547, 1577, 1615, 1601)

Added
- Italic Greek capital letters [1118](https://github.com/Khan/KaTeX/pull/1103)
- Added support for `\mathring` [1125](https://github.com/Khan/KaTeX/pull/1125)
- Added support for unicode angle brackets, single vertical bar, double vertical bar [1123](https://github.com/Khan/KaTeX/pull/1123)
- Added support for Reaction Arrows [1078](https://github.com/Khan/KaTeX/pull/1078)
- Added `\nobreakspace` [1145](https://github.com/Khan/KaTeX/pull/1145)
- Added support for Unicode colon equals ≔ [1151](https://github.com/Khan/KaTeX/pull/1151)
- Added support for `\underline` in text mode [1159](https://github.com/Khan/KaTeX/pull/1159)

Changed
- Enable spacing functions in text mode [1139](https://github.com/Khan/KaTeX/pull/1139)

Fixed
- Improved JS spacing [1103](https://github.com/Khan/KaTeX/pull/1103)
- Fixed handling of Unicode characters ð, Å, å [1157](https://github.com/Khan/KaTeX/pull/1157)
- Padding over `\sqrt` and Paths for frac-line [1143](https://github.com/Khan/KaTeX/pull/1143)

Added
- Added support for `\aa`, `\AA`, `\lq`, `\rq`, `\lbrack`, `\rbrack` [1069](https://github.com/Khan/KaTeX/pull/1069)
- Added support for more scripts in `\text{}` environments such as Czech, Georgian, Hungarian, Turkish. [1076](https://github.com/Khan/KaTeX/pull/1076)
- add Main-BoldItalic font to allow nesting of `\textit` and `\textbf`
- Added `\S` and `\P` [1110](https://github.com/Khan/KaTeX/pull/1110)

Changed
- Remove symlink to support devs using Windows [1090](https://github.com/Khan/KaTeX/pull/1090)

Fixed
- Do not inherit SVG style properties from the environment. [1089](https://github.com/Khan/KaTeX/pull/1089)
- Update fonts and metrics so that accents are positioned correctly [1094](https://github.com/Khan/KaTeX/pull/1094)
- Non-portable use of String method `.includes`. Fixed [1093](https://github.com/Khan/KaTeX/issues/1093)
- Use correct spacing with tight styles. See [1106](https://github.com/Khan/KaTeX/pull/1106) for more details.

Added
- `\kern` fixed and support `\hskip`, `\TeX`, `\LaTeX`, `\KaTeX`. See [974](https://github.com/Khan/KaTeX/pull/974)
- Supported Unicode middle dot and Unicode accents.
- Added basic support for Indic scripts in addition to CJK. [1060](https://github.com/Khan/KaTeX/pull/1060)
- Added support for bold italic symbols. [1011](https://github.com/Khan/KaTeX/pull/1011)
- add `\ae`, `\AE`, `\oe`, `\OE`, `\o`, `\O`, `\ss` with unicode support for those characters in text mode. [1030](https://github.com/Khan/KaTeX/pull/1030)
- Added `\i` and `\j` for text mode. [1029](https://github.com/Khan/KaTeX/pull/1029)
- Added `buildHTMLTree`. [1022](https://github.com/Khan/KaTeX/pull/1022)
- Implemented `\TextOrMath`, secondoftwo. [1024](https://github.com/Khan/KaTeX/pull/1024)
- Added a 'common issues' section to the `README.md`. [1034](https://github.com/Khan/KaTeX/pull/1034)

Changed
- Made a more working example in README.md. Fixed [1049](https://github.com/Khan/KaTeX/issues/1049) PR is [1050](https://github.com/Khan/KaTeX/pull/1050)
- Exposing the build tree. [1017](https://github.com/Khan/KaTeX/pull/1017)
- Changed `\xLongequal` to `\xlongequal`. [997](https://github.com/Khan/KaTeX/pull/997)

Fixed
- Avoid negative space in `\bmod`. [984](https://github.com/Khan/KaTeX/pull/984)
- Stacking text commands. [1009](https://github.com/Khan/KaTeX/pull/1009)
- Fixed `\vec` by replacing the combining font glyph with an SVG. [1018](https://github.com/Khan/KaTeX/pull/1018)
- Made accents zero width. [1033](https://github.com/Khan/KaTeX/pull/1033)
- Fixed frac-line. [1025](https://github.com/Khan/KaTeX/pull/1025)
- Implemented correct macros for `liminf` and `limsup`. Fixed [111](https://github.com/Khan/KaTeX/issues/111)
- `\kern` generates right-margin instead of left-margin. Fixed [995](https://github.com/Khan/KaTeX/issues/995)

Added
- Added Unicode Relations and Unicode Symbol support. Supports Unicode ∴, ∵, `\mid`, Arrows, Big Operators, Binary Operators, Negated Relations.
- Implemented the `alignedat` environment for flexible math spacing. [930](https://github.com/Khan/KaTeX/pull/930)
- Implemented `\mathchoice` command. [969](https://github.com/Khan/KaTeX/pull/969)
- Implemented `\href` command. [923](https://github.com/Khan/KaTeX/pull/923)
- `\hspace*`, `\ifstar`, `\ifnextchar`, `\firstoftwo` (975)
- Added `\notni` character `∌`. [710](https://github.com/Khan/KaTeX/pull/710)
- Added ng-katex link to README.md. [959](https://github.com/Khan/KaTeX/pull/959)

Changed
- Single-character macros like active characters. [973](https://github.com/Khan/KaTeX/pull/973)
- Re `flow`:
- Port buildTree, katex, mathMLTree, parseTree, stretchy to flow.

Fixed
- Fixed the spacing between columns in the {aligned} environment. [942](https://github.com/Khan/KaTeX/pull/942)
- Fixed issue where the {aligned} environment skips the last line if the first column is empty. [949](https://github.com/Khan/KaTeX/pull/949)
- Appended `ApplyFunction` to math functions in MathML. [960](https://github.com/Khan/KaTeX/pull/960)
- Changed `\undertilde` to `\utilde`. [948](https://github.com/Khan/KaTeX/pull/948)
- Changed `frac-line` from border to full span. [976](https://github.com/Khan/KaTeX/pull/976)

Changed
- Edited link to Function Support page. [922](https://github.com/Khan/KaTeX/pull/922)
- Re `flow`:
- Exported svgGeometry to flow. [936](https://github.com/Khan/KaTeX/pull/936)
- Ported utils to flow. [935](https://github.com/Khan/KaTeX/pull/935)

Fixed
- Fixed space handling. [912](https://github.com/Khan/KaTeX/pull/912)
- Prevents disappearing fraction lines. [931](https://github.com/Khan/KaTeX/pull/931)