From a82346365372f2bc213c41cc69ebae1665ae0d32 Mon Sep 17 00:00:00 2001
From: Jonathan <jonathan.phz@gmail.com>
Date: Fri, 12 Jul 2019 07:45:44 -0300
Subject: [PATCH] fix(gatsby-plugin-mdx): Fix Safari 9 `const` syntax error
 (#15644)

`SyntaxError: Unexpected keyword 'const'. Const declarations are not supported in strict mode.`

Gatsby sites using mdx break in Safari 9 (possibly other older browsers) because it's using es6 `const`.
---
 packages/gatsby-plugin-mdx/loaders/mdx-scopes.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/gatsby-plugin-mdx/loaders/mdx-scopes.js b/packages/gatsby-plugin-mdx/loaders/mdx-scopes.js
index d67ebf177fed3..0f873ce403209 100644
--- a/packages/gatsby-plugin-mdx/loaders/mdx-scopes.js
+++ b/packages/gatsby-plugin-mdx/loaders/mdx-scopes.js
@@ -12,7 +12,7 @@ module.exports = function() {
     files
       .map(
         (file, i) =>
-          `const scope_${i} = require('${slash(
+          `var scope_${i} = require('${slash(
             path.join(abs, file)
           )}').default;`
       )