Use a Set for shortcode names (#522)

chasemccoy · johno · commit c220f4c44f9b · 2019-04-12T10:46:28.000-06:00
* Use a Set for shortcode names Fixes #518 * Use a Set for shortcode names
diff --git a/packages/mdx/mdx-hast-to-jsx.js b/packages/mdx/mdx-hast-to-jsx.js
@@ -174,7 +174,7 @@ MDXContent.isMDXComponent = true`
   return <div {...props}/>
 };
 ` +
-      jsxNames
+      [...new Set(jsxNames)]
         .filter(name => !importExportNames.includes(name))
         .map(name => {
           return `const ${name} = makeShortcode("${name}");`
