增加github

Author: kscript

README.md

@@ -42,6 +42,7 @@ markdownDownload(websiteConfigs.juejin, {
 ```
 
 ## 已支持的网站
+[Github Issue](https://github.com/)  
 [掘金](https://juejin.cn/)  
 [知乎专栏](https://zhuanlan.zhihu.com/)  
 [思否专栏](https://segmentfault.com/)  

src/mathjax.js

@@ -0,0 +1,13 @@
+require('mathjax/es5/tex-svg')
+const tex2svg = (markdownDoc) => {
+  return markdownDoc.replace(/<ztext>(.*?)<\/ztext>/g, (s, s1) => {
+    const tex = decodeURIComponent(s1)
+    const svg = MathJax.tex2svg(tex)
+    svg.setAttribute('data-tex', tex)
+    svg.style.display = 'inline'
+    return svg.outerHTML
+  })
+}
+Object.assign(module.exports, Object.assign(exports, {
+  tex2svg
+}))

src/websites/github.js

@@ -0,0 +1,29 @@
+export const hosts = ['github.com']
+
+export const options = {
+  origin: 'github',
+  link: false,
+  br: true,
+  code: false,
+  selectors: {
+    title: '#partial-discussion-header .markdown-title',
+    body: '.js-quote-selection-container .markdown-body',
+    copyBtn: '.copy-btn',
+    userName: '[data-hovercard-type="user"]',
+    userLink: '[data-hovercard-type="user"]',
+    invalid: '',
+    unpack: '',
+    tag: '.js-issue-labels .IssueLabel'
+  }
+}
+
+export const hook = {
+}
+
+export const config = {
+  hosts,
+  options,
+  hook
+}
+
+export default config

src/websites/zhihu.js

@@ -1,4 +1,3 @@
-import { tex2svg } from '../utils'
 export const hosts = ['zhuanlan.zhihu.com']
 
 export const options = {
@@ -28,6 +27,7 @@ export const hook = {
     })
   },
   formatContent (context, { markdownDoc }) {
+    const { tex2svg } = require('../mathjax')
     return tex2svg(markdownDoc)
   }
 }