feat(compiler): support for setting target attribute for link, fixed #230

Author: QingWei-Li

Diff for: docs/de-de/helpers.md

@@ -49,3 +49,10 @@ You will get `<a href="/demo/">link</a>`html. Do not worry, you can still set ti
 
 <a href="/demo/" title="title">link</a>
 ```
+
+## Set target attribute for link
+
+```md
+[link](/demo ":target=_blank")
+[link](/demo2 ":target=_self")
+```

Diff for: docs/helpers.md

@@ -50,3 +50,10 @@ You will get `<a href="/demo/">link</a>`html. Do not worry, you can still set ti
 <a href="/demo/" title="title">link</a>
 ```
 
+## Set target attribute for link
+
+```md
+[link](/demo ":target=_blank")
+[link](/demo2 ":target=_self")
+```
+

Diff for: docs/zh-cn/helpers.md

@@ -49,3 +49,10 @@ You will get `<a href="/demo/">link</a>`html. Do not worry, you can still set ti
 <a href="/demo/" title="title">link</a>
 ```
 
+
+## Set target attribute for link
+
+```md
+[link](/demo ":target=_blank")
+[link](/demo2 ":target=_self")
+```

Diff for: src/core/render/compiler.js

@@ -105,6 +105,13 @@ export class Compiler {
         title = title && title.replace(/:ignore/g, '').trim()
       }
 
+      let target = title && title.match(/:target=\w+/)
+      if (target) {
+        target = target[0]
+        title = title.replace(target, '')
+        blank = ' ' + target.slice(1)
+      }
+
       if (title) {
         title = ` title="${title}"`
       }