Support decorators

Author: Ives van Hoorne

src/sandbox/eval/js.js

@@ -5,6 +5,7 @@ import { transform } from 'babel-standalone';
 import asyncPlugin from 'babel-plugin-transform-async-to-generator';
 import restSpread from 'babel-plugin-transform-object-rest-spread';
 import classProperties from 'babel-plugin-transform-class-properties';
+import decoratorPlugin from 'babel-plugin-transform-decorators-legacy';
 
 import evalModule from './';
 import resolveModule from '../utils/resolve-module';
@@ -30,7 +31,7 @@ const compileCode = (code: string = '', moduleName: string = 'unknown') => {
   try {
     return transform(code, {
       presets: ['es2015', 'react', 'stage-0'],
-      plugins: [asyncPlugin, restSpread, classProperties],
+      plugins: [asyncPlugin, restSpread, classProperties, decoratorPlugin],
       retainLines: true,
     }).code;
   } catch (e) {

yarn.lock

@@ -1209,7 +1209,7 @@ babel-standalone@^6.21.1-0:
   version "6.23.1"
   resolved "https://registry.yarnpkg.com/babel-standalone/-/babel-standalone-6.23.1.tgz#904a6db801f6b485e693459e8adc6c3a00416e20"
 
-babel-template@^6.16.0, babel-template@^6.22.0, babel-template@^6.24.1, babel-template@^6.7.0:
+babel-template@^6.16.0, babel-template@^6.22.0, babel-template@^6.24.1, babel-template@^6.3.0, babel-template@^6.7.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-template/-/babel-template-6.24.1.tgz#04ae514f1f93b3a2537f2a0f60a5a45fb8308333"
   dependencies:
@@ -1219,7 +1219,7 @@ babel-template@^6.16.0, babel-template@^6.22.0, babel-template@^6.24.1, babel-te
     babylon "^6.11.0"
     lodash "^4.2.0"
 
-babel-template@^6.23.0, babel-template@^6.3.0:
+babel-template@^6.23.0:
   version "6.23.0"
   resolved "https://registry.yarnpkg.com/babel-template/-/babel-template-6.23.0.tgz#04d4f270adbb3aa704a8143ae26faa529238e638"
   dependencies: