feat: Add babel-plugin-remove-export-keywords

packages/babel-plugin-remove-export-keywords/index.js

@@ -0,0 +1,14 @@
+module.exports = function removeExportKeywords() {
+    return {
+      visitor: {
+        ExportNamedDeclaration(path) {
+          const declaration = path.node.declaration;
+
+          // Ignore "export { Foo as default }" syntax
+          if (declaration) {
+            path.replaceWith(declaration);
+          }
+        }
+      }
+    };
+};

packages/babel-plugin-remove-export-keywords/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "@mdx-js/babel-plugin-remove-export-keywords",
+  "version": "1.0.0",
+  "description": "Remove plugin export keywords",
+  "license": "MIT",
+  "keywords": [
+    "mdx",
+    "markdown",
+    "react",
+    "jsx",
+    "remark",
+    "babel"
+  ],
+  "homepage": "https://mdxjs.com",
+  "repository": "mdx-js/mdx",
+  "bugs": "https://github.com/mdx-js/mdx/issues",
+  "author": "John Otander <johnotander@gmail.com> (http://johnotander.com)",
+  "files": [
+    "index.js"
+  ],
+  "devDependencies": {
+    "@babel/core": "7.5.5",
+    "@babel/preset-react": "^7.0.0",
+    "jest": "24.8.0"
+  },
+  "scripts": {
+    "test": "jest"
+  },
+  "jest": {
+    "testEnvironment": "node"
+  }
+}

packages/babel-plugin-remove-export-keywords/test/index.test.js

@@ -0,0 +1,34 @@
+const babel = require('@babel/core')
+
+const plugin = require('..')
+
+const testContents = `
+export const foo = 'bar';
+/** @jsx mdx*/ export const _frontmatter = {
+  title: "Here's a title with the word export"
+};
+const MDXContent = function () {};
+export { MDXContent as default };
+`
+const expectedResults = `const foo = 'bar';
+/** @jsx mdx*/
+
+const _frontmatter = {
+  title: "Here's a title with the word export"
+};
+
+const MDXContent = function () {};
+
+export { MDXContent as default };`
+
+describe('babel-plugin-remove-export-keywords', () => {
+  test('removes all export keywords', () => {
+    const result = babel.transform(testContents, {
+      configFile: false,
+      plugins: [plugin],
+      presets: [require('@babel/preset-react')]
+    })
+
+    expect(result.code).toEqual(expectedResults)
+  })
+})