1
0
Fork 0

initial commit

This commit is contained in:
Waylon Flinn 2016-03-11 07:56:48 -06:00
commit 1f131892db
6 changed files with 1089 additions and 0 deletions

51
README.md Normal file
View file

@ -0,0 +1,51 @@
# markdown-it-katex
Add Math to your Markdown
KaTeX is fast. This plugin makes it easy to support it in your markdown.
## Usage
```
npm install markdown-it-katex
```
Include the KaTeX stylesheet in your html:
```html
<link rel="stylesheet"href="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.3.0/katex.min.css">
```
If you're using the default markdown-it parser, I also recommend the github stylesheet:
https://github.com/sindresorhus/github-markdown-css
## Examples
### Inline
Surround your LaTeX with a single `$` on each side for inline rendering.
```
$\sqrt{3x-1}+(1+x)^2$
```
### Block
Use two (`$$`) for block rendering. This mode uses bigger symbols and centers
the result.
```
$$\begin{array}{c}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &
= \frac{4\pi}{c}\vec{\mathbf{j}} \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{array}$$
```
## Math Syntax Support
KaTeX is based on TeX and LaTeX. Support for both is growing. Here's a list of
currently supported functions:
[Function Support in KaTeX](https://github.com/Khan/KaTeX/wiki/Function-Support-in-KaTeX)

84
browser.js Normal file
View file

@ -0,0 +1,84 @@
var md = require('markdown-it')(),
mk = require('./index');
md.use(mk);
var input = document.getElementById('input'),
output = document.getElementById('output'),
button = document.getElementById('button');
button.addEventListener('click', function(ev){
var result = md.render(input.value);
output.innerHTML = result;
});
/*
# Some Math
$\sqrt{3x-1}+(1+x)^2$
# Maxwells Equations
$\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t}
= \frac{4\pi}{c}\vec{\mathbf{j}} \nabla \cdot \vec{\mathbf{E}} = 4 \pi \rho$
$\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} = \vec{\mathbf{0}}$ (curl of $\vec{\mathbf{E}}$ is proportional to the time derivative of $\vec{\mathbf{B}}$)
$\nabla \cdot \vec{\mathbf{B}} = 0$
\sqrt{3x-1}+(1+x)^2
c = \pm\sqrt{a^2 + b^2}
Maxwell's Equations
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t}
= \frac{4\pi}{c}\vec{\mathbf{j}} \nabla \cdot \vec{\mathbf{E}} = 4 \pi \rho
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} = \vec{\mathbf{0}}
\nabla \cdot \vec{\mathbf{B}} = 0
Same thing in a LaTeX array
\begin{array}{c}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &
= \frac{4\pi}{c}\vec{\mathbf{j}} \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} & = 0
\end{array}
\begin{array}{c}
y_1 \\
y_2 \mathtt{t}_i \\
z_{3,4}
\end{array}
\begin{array}{c}
x' &=& &x \sin\phi &+& z \cos\phi \\
z' &=& - &x \cos\phi &+& z \sin\phi \\
\end{array}
# Maxwell's Equations
equation | description
----------|------------
$\nabla \cdot \vec{\mathbf{B}} = 0$ | divergence of $\vec{\mathbf{B}}$ is zero
$\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} = \vec{\mathbf{0}}$ | curl of $\vec{\mathbf{E}}$ is proportional to the rate of change of $\vec{\mathbf{B}}$
$\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} = \frac{4\pi}{c}\vec{\mathbf{j}} \nabla \cdot \vec{\mathbf{E}} = 4 \pi \rho$ | wha?
![electricity](http://i.giphy.com/Gty2oDYQ1fih2.gif)
*/

656
github-markdown.css Normal file
View file

@ -0,0 +1,656 @@
@font-face {
font-family: octicons-link;
src: url(data:font/woff;charset=utf-8;base64,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) format('woff');
}
.markdown-body {
-webkit-text-size-adjust: 100%;
text-size-adjust: 100%;
color: #333;
font-family: "Helvetica Neue", Helvetica, "Segoe UI", Arial, freesans, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
font-size: 16px;
line-height: 1.6;
word-wrap: break-word;
}
.markdown-body a {
background-color: transparent;
}
.markdown-body a:active,
.markdown-body a:hover {
outline: 0;
}
.markdown-body strong {
font-weight: bold;
}
.markdown-body h1 {
font-size: 2em;
margin: 0.67em 0;
}
.markdown-body img {
border: 0;
}
.markdown-body hr {
box-sizing: content-box;
height: 0;
}
.markdown-body pre {
overflow: auto;
}
.markdown-body code,
.markdown-body kbd,
.markdown-body pre {
font-family: monospace, monospace;
font-size: 1em;
}
.markdown-body input {
color: inherit;
font: inherit;
margin: 0;
}
.markdown-body html input[disabled] {
cursor: default;
}
.markdown-body input {
line-height: normal;
}
.markdown-body input[type="checkbox"] {
box-sizing: border-box;
padding: 0;
}
.markdown-body table {
border-collapse: collapse;
border-spacing: 0;
}
.markdown-body td,
.markdown-body th {
padding: 0;
}
.markdown-body * {
box-sizing: border-box;
}
.markdown-body input {
font: 13px / 1.4 Helvetica, arial, nimbussansl, liberationsans, freesans, clean, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}
.markdown-body a {
color: #4078c0;
text-decoration: none;
}
.markdown-body a:hover,
.markdown-body a:active {
text-decoration: underline;
}
.markdown-body hr {
height: 0;
margin: 15px 0;
overflow: hidden;
background: transparent;
border: 0;
border-bottom: 1px solid #ddd;
}
.markdown-body hr:before {
display: table;
content: "";
}
.markdown-body hr:after {
display: table;
clear: both;
content: "";
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
margin-top: 15px;
margin-bottom: 15px;
line-height: 1.1;
}
.markdown-body h1 {
font-size: 30px;
}
.markdown-body h2 {
font-size: 21px;
}
.markdown-body h3 {
font-size: 16px;
}
.markdown-body h4 {
font-size: 14px;
}
.markdown-body h5 {
font-size: 12px;
}
.markdown-body h6 {
font-size: 11px;
}
.markdown-body blockquote {
margin: 0;
}
.markdown-body ul,
.markdown-body ol {
padding: 0;
margin-top: 0;
margin-bottom: 0;
}
.markdown-body ol ol,
.markdown-body ul ol {
list-style-type: lower-roman;
}
.markdown-body ul ul ol,
.markdown-body ul ol ol,
.markdown-body ol ul ol,
.markdown-body ol ol ol {
list-style-type: lower-alpha;
}
.markdown-body dd {
margin-left: 0;
}
.markdown-body code {
font-family: Consolas, "Liberation Mono", Menlo, Courier, monospace;
font-size: 12px;
}
.markdown-body pre {
margin-top: 0;
margin-bottom: 0;
font: 12px Consolas, "Liberation Mono", Menlo, Courier, monospace;
}
.markdown-body .select::-ms-expand {
opacity: 0;
}
.markdown-body .octicon {
font: normal normal normal 16px/1 octicons-link;
display: inline-block;
text-decoration: none;
text-rendering: auto;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
-webkit-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
}
.markdown-body .octicon-link:before {
content: '\f05c';
}
.markdown-body:before {
display: table;
content: "";
}
.markdown-body:after {
display: table;
clear: both;
content: "";
}
.markdown-body>*:first-child {
margin-top: 0 !important;
}
.markdown-body>*:last-child {
margin-bottom: 0 !important;
}
.markdown-body a:not([href]) {
color: inherit;
text-decoration: none;
}
.markdown-body .anchor {
display: inline-block;
padding-right: 2px;
margin-left: -18px;
}
.markdown-body .anchor:focus {
outline: none;
}
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
margin-top: 1em;
margin-bottom: 16px;
font-weight: bold;
line-height: 1.4;
}
.markdown-body h1 .octicon-link,
.markdown-body h2 .octicon-link,
.markdown-body h3 .octicon-link,
.markdown-body h4 .octicon-link,
.markdown-body h5 .octicon-link,
.markdown-body h6 .octicon-link {
color: #000;
vertical-align: middle;
visibility: hidden;
}
.markdown-body h1:hover .anchor,
.markdown-body h2:hover .anchor,
.markdown-body h3:hover .anchor,
.markdown-body h4:hover .anchor,
.markdown-body h5:hover .anchor,
.markdown-body h6:hover .anchor {
text-decoration: none;
}
.markdown-body h1:hover .anchor .octicon-link,
.markdown-body h2:hover .anchor .octicon-link,
.markdown-body h3:hover .anchor .octicon-link,
.markdown-body h4:hover .anchor .octicon-link,
.markdown-body h5:hover .anchor .octicon-link,
.markdown-body h6:hover .anchor .octicon-link {
visibility: visible;
}
.markdown-body h1 {
padding-bottom: 0.3em;
font-size: 2.25em;
line-height: 1.2;
border-bottom: 1px solid #eee;
}
.markdown-body h1 .anchor {
line-height: 1;
}
.markdown-body h2 {
padding-bottom: 0.3em;
font-size: 1.75em;
line-height: 1.225;
border-bottom: 1px solid #eee;
}
.markdown-body h2 .anchor {
line-height: 1;
}
.markdown-body h3 {
font-size: 1.5em;
line-height: 1.43;
}
.markdown-body h3 .anchor {
line-height: 1.2;
}
.markdown-body h4 {
font-size: 1.25em;
}
.markdown-body h4 .anchor {
line-height: 1.2;
}
.markdown-body h5 {
font-size: 1em;
}
.markdown-body h5 .anchor {
line-height: 1.1;
}
.markdown-body h6 {
font-size: 1em;
color: #777;
}
.markdown-body h6 .anchor {
line-height: 1.1;
}
.markdown-body p,
.markdown-body blockquote,
.markdown-body ul,
.markdown-body ol,
.markdown-body dl,
.markdown-body table,
.markdown-body pre {
margin-top: 0;
margin-bottom: 16px;
}
.markdown-body hr {
height: 4px;
padding: 0;
margin: 16px 0;
background-color: #e7e7e7;
border: 0 none;
}
.markdown-body ul,
.markdown-body ol {
padding-left: 2em;
}
.markdown-body ul ul,
.markdown-body ul ol,
.markdown-body ol ol,
.markdown-body ol ul {
margin-top: 0;
margin-bottom: 0;
}
.markdown-body li>p {
margin-top: 16px;
}
.markdown-body dl {
padding: 0;
}
.markdown-body dl dt {
padding: 0;
margin-top: 16px;
font-size: 1em;
font-style: italic;
font-weight: bold;
}
.markdown-body dl dd {
padding: 0 16px;
margin-bottom: 16px;
}
.markdown-body blockquote {
padding: 0 15px;
color: #777;
border-left: 4px solid #ddd;
}
.markdown-body blockquote>:first-child {
margin-top: 0;
}
.markdown-body blockquote>:last-child {
margin-bottom: 0;
}
.markdown-body table {
display: block;
width: 100%;
overflow: auto;
word-break: normal;
word-break: keep-all;
}
.markdown-body table th {
font-weight: bold;
}
.markdown-body table th,
.markdown-body table td {
padding: 6px 13px;
border: 1px solid #ddd;
}
.markdown-body table tr {
background-color: #fff;
border-top: 1px solid #ccc;
}
.markdown-body table tr:nth-child(2n) {
background-color: #f8f8f8;
}
.markdown-body img {
max-width: 100%;
box-sizing: content-box;
background-color: #fff;
}
.markdown-body code {
padding: 0;
padding-top: 0.2em;
padding-bottom: 0.2em;
margin: 0;
font-size: 85%;
background-color: rgba(0,0,0,0.04);
border-radius: 3px;
}
.markdown-body code:before,
.markdown-body code:after {
letter-spacing: -0.2em;
content: "\00a0";
}
.markdown-body pre>code {
padding: 0;
margin: 0;
font-size: 100%;
word-break: normal;
white-space: pre;
background: transparent;
border: 0;
}
.markdown-body .highlight {
margin-bottom: 16px;
}
.markdown-body .highlight pre,
.markdown-body pre {
padding: 16px;
overflow: auto;
font-size: 85%;
line-height: 1.45;
background-color: #f7f7f7;
border-radius: 3px;
}
.markdown-body .highlight pre {
margin-bottom: 0;
word-break: normal;
}
.markdown-body pre {
word-wrap: normal;
}
.markdown-body pre code {
display: inline;
max-width: initial;
padding: 0;
margin: 0;
overflow: initial;
line-height: inherit;
word-wrap: normal;
background-color: transparent;
border: 0;
}
.markdown-body pre code:before,
.markdown-body pre code:after {
content: normal;
}
.markdown-body kbd {
display: inline-block;
padding: 3px 5px;
font-size: 11px;
line-height: 10px;
color: #555;
vertical-align: middle;
background-color: #fcfcfc;
border: solid 1px #ccc;
border-bottom-color: #bbb;
border-radius: 3px;
box-shadow: inset 0 -1px 0 #bbb;
}
.markdown-body .pl-c {
color: #969896;
}
.markdown-body .pl-c1,
.markdown-body .pl-s .pl-v {
color: #0086b3;
}
.markdown-body .pl-e,
.markdown-body .pl-en {
color: #795da3;
}
.markdown-body .pl-s .pl-s1,
.markdown-body .pl-smi {
color: #333;
}
.markdown-body .pl-ent {
color: #63a35c;
}
.markdown-body .pl-k {
color: #a71d5d;
}
.markdown-body .pl-pds,
.markdown-body .pl-s,
.markdown-body .pl-s .pl-pse .pl-s1,
.markdown-body .pl-sr,
.markdown-body .pl-sr .pl-cce,
.markdown-body .pl-sr .pl-sra,
.markdown-body .pl-sr .pl-sre {
color: #183691;
}
.markdown-body .pl-v {
color: #ed6a43;
}
.markdown-body .pl-id {
color: #b52a1d;
}
.markdown-body .pl-ii {
background-color: #b52a1d;
color: #f8f8f8;
}
.markdown-body .pl-sr .pl-cce {
color: #63a35c;
font-weight: bold;
}
.markdown-body .pl-ml {
color: #693a17;
}
.markdown-body .pl-mh,
.markdown-body .pl-mh .pl-en,
.markdown-body .pl-ms {
color: #1d3e81;
font-weight: bold;
}
.markdown-body .pl-mq {
color: #008080;
}
.markdown-body .pl-mi {
color: #333;
font-style: italic;
}
.markdown-body .pl-mb {
color: #333;
font-weight: bold;
}
.markdown-body .pl-md {
background-color: #ffecec;
color: #bd2c00;
}
.markdown-body .pl-mi1 {
background-color: #eaffea;
color: #55a532;
}
.markdown-body .pl-mdr {
color: #795da3;
font-weight: bold;
}
.markdown-body .pl-mo {
color: #1d3e81;
}
.markdown-body kbd {
display: inline-block;
padding: 3px 5px;
font: 11px Consolas, "Liberation Mono", Menlo, Courier, monospace;
line-height: 10px;
color: #555;
vertical-align: middle;
background-color: #fcfcfc;
border: solid 1px #ccc;
border-bottom-color: #bbb;
border-radius: 3px;
box-shadow: inset 0 -1px 0 #bbb;
}
.markdown-body .task-list-item {
list-style-type: none;
}
.markdown-body .task-list-item+.task-list-item {
margin-top: 3px;
}
.markdown-body .task-list-item input {
margin: 0 0.35em 0.25em -1.6em;
vertical-align: middle;
}
.markdown-body :checked+.radio-label {
z-index: 1;
position: relative;
border-color: #4078c0;
}

21
index.html Normal file
View file

@ -0,0 +1,21 @@
<!DOCTYPE html>
<head>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/KaTeX/0.3.0/katex.min.css">
<link rel="stylesheet" href="github-markdown.css">
<style>
#input {
display: block;
font-size: 12pt;
}
#output {
margin: 20px;
}
</style>
</head>
<body>
<textarea id="input" type="textarea" rows=10, cols=80>$\sqrt{3x-1}+(1+x)^2$</textarea>
<button id="button">Mathdown!</button>
<div id="output" class="markdown-body"></div>
<script src="./bundle.js"></script>
</body>

256
index.js Normal file
View file

@ -0,0 +1,256 @@
/* Process inline math */
/*
Like markdown-it-simplemath, this is a stripped down, simplified version of:
https://github.com/runarberg/markdown-it-math
It differs in that it takes (a subset of) LaTeX as input and relies on KaTeX
for rendering output.
*/
'use strict';
var katex = require('katex');
function scanDelims(state, start, delimLength) {
var pos = start, lastChar, nextChar, count, can_open, can_close,
isLastWhiteSpace, isLastPunctChar,
isNextWhiteSpace, isNextPunctChar,
left_flanking = true,
right_flanking = true,
max = state.posMax,
isWhiteSpace = state.md.utils.isWhiteSpace,
isPunctChar = state.md.utils.isPunctChar,
isMdAsciiPunct = state.md.utils.isMdAsciiPunct;
// treat beginning of the line as a whitespace
lastChar = start > 0 ? state.src.charCodeAt(start - 1) : 0x20;
if (pos >= max) {
can_open = false;
}
pos += delimLength;
count = pos - start;
// treat end of the line as a whitespace
nextChar = pos < max ? state.src.charCodeAt(pos) : 0x20;
isLastPunctChar = isMdAsciiPunct(lastChar) || isPunctChar(String.fromCharCode(lastChar));
isNextPunctChar = isMdAsciiPunct(nextChar) || isPunctChar(String.fromCharCode(nextChar));
isLastWhiteSpace = isWhiteSpace(lastChar);
isNextWhiteSpace = isWhiteSpace(nextChar);
if (isNextWhiteSpace) {
left_flanking = false;
} else if (isNextPunctChar) {
if (!(isLastWhiteSpace || isLastPunctChar)) {
left_flanking = false;
}
}
if (isLastWhiteSpace) {
right_flanking = false;
} else if (isLastPunctChar) {
if (!(isNextWhiteSpace || isNextPunctChar)) {
right_flanking = false;
}
}
can_open = left_flanking;
can_close = right_flanking;
return {
can_open: can_open,
can_close: can_close,
delims: count
};
}
function makeMath_inline(open, close) {
return function math_inline(state, silent) {
var startCount,
found,
res,
token,
closeDelim,
max = state.posMax,
start = state.pos,
openDelim = state.src.slice(start, start + open.length);
if (openDelim !== open) { return false; }
if (silent) { return false; } // Dont run any pairs in validation mode
res = scanDelims(state, start, openDelim.length);
startCount = res.delims;
if (!res.can_open) {
state.pos += startCount;
// Earlier we checked !silent, but this implementation does not need it
state.pending += state.src.slice(start, state.pos);
return true;
}
state.pos = start + open.length;
while (state.pos < max) {
closeDelim = state.src.slice(state.pos, state.pos + close.length);
if (closeDelim === close) {
res = scanDelims(state, state.pos, close.length);
if (res.can_close) {
found = true;
break;
}
}
state.md.inline.skipToken(state);
}
if (!found) {
// Parser failed to find ending tag, so it is not a valid math
state.pos = start;
return false;
}
// Found!
state.posMax = state.pos;
state.pos = start + close.length;
// Earlier we checked !silent, but this implementation does not need it
token = state.push('math_inline', 'math', 0);
token.content = state.src.slice(state.pos, state.posMax);
token.markup = open;
state.pos = state.posMax + close.length;
state.posMax = max;
return true;
};
}
function makeMath_block(open, close) {
return function math_block(state, startLine, endLine, silent) {
var openDelim, len, params, nextLine, token, firstLine, lastLine, lastLinePos,
haveEndMarker = false,
pos = state.bMarks[startLine] + state.tShift[startLine],
max = state.eMarks[startLine];
if (pos + open.length > max) { return false; }
openDelim = state.src.slice(pos, pos + open.length);
if (openDelim !== open) { return false; }
pos += open.length;
firstLine = state.src.slice(pos, max);
// Since start is found, we can report success here in validation mode
if (silent) { return true; }
if (firstLine.trim().slice(-close.length) === close) {
// Single line expression
firstLine = firstLine.trim().slice(0, -close.length);
haveEndMarker = true;
}
// search end of block
nextLine = startLine;
for (;;) {
if (haveEndMarker) { break; }
nextLine++;
if (nextLine >= endLine) {
// unclosed block should be autoclosed by end of document.
// also block seems to be autoclosed by end of parent
break;
}
pos = state.bMarks[nextLine] + state.tShift[nextLine];
max = state.eMarks[nextLine];
if (pos < max && state.tShift[nextLine] < state.blkIndent) {
// non-empty line with negative indent should stop the list:
break;
}
if (state.src.slice(pos, max).trim().slice(-close.length) !== close) {
continue;
}
if (state.tShift[nextLine] - state.blkIndent >= 4) {
// closing block math should be indented less then 4 spaces
continue;
}
lastLinePos = state.src.slice(0, max).lastIndexOf(close);
lastLine = state.src.slice(pos, lastLinePos);
pos += lastLine.length + close.length;
// make sure tail has spaces only
pos = state.skipSpaces(pos);
if (pos < max) { continue; }
// found!
haveEndMarker = true;
}
// If math block has heading spaces, they should be removed from its inner block
len = state.tShift[startLine];
state.line = nextLine + (haveEndMarker ? 1 : 0);
token = state.push('math_block', 'math', 0);
token.block = true;
token.content = (firstLine && firstLine.trim() ? firstLine + '\n' : '') +
state.getLines(startLine + 1, nextLine, len, true) +
(lastLine && lastLine.trim() ? lastLine : '');
token.info = params;
token.map = [ startLine, state.line ];
token.markup = open;
return true;
};
}
module.exports = function math_plugin(md) {
// Default options
var inlineOpen = '$',
inlineClose = '$',
blockOpen = '$$',
blockClose = '$$';
// set KaTeX as the renderer for markdown-it-simplemath
var katexInline = function(latex){
return katex.renderToString(latex, {"displayMode" : false});
};
var inlineRenderer = function(tokens, idx){
return katexInline(tokens[idx].content);
};
var katexBlock = function(latex){
return katex.renderToString(latex, {"displayMode" : true});
}
var blockRenderer = function(tokens, idx){
return katexBlock(tokens[idx].content) + '\n';
}
var math_inline = makeMath_inline(inlineOpen, inlineClose);
var math_block = makeMath_block(blockOpen, blockClose);
md.inline.ruler.before('escape', 'math_inline', math_inline);
md.block.ruler.after('blockquote', 'math_block', math_block, {
alt: [ 'paragraph', 'reference', 'blockquote', 'list' ]
});
md.renderer.rules.math_inline = inlineRenderer;
md.renderer.rules.math_block = blockRenderer;
};

21
package.json Normal file
View file

@ -0,0 +1,21 @@
{
"name": "markdown-it-katex",
"version": "1.0.0",
"description": "Easy KaTeX support for markdown-it ",
"main": "index.js",
"scripts": {
"watch": "watchify browser.js -o bundle.js -v",
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [
"markdown",
"KaTeX",
"math",
"LaTeX"
],
"author": "waylonflinn@gmail.com",
"license": "MIT",
"dependencies": {
"katex": "^0.5.1"
}
}