{"action":"created","comment":{"url":"https://api.github.com/repos/scala-js/scala-js/pulls/comments/29310549","id":29310549,"diff_hunk":"@@ -132,7 +132,16 @@ object CoreJSLibs {\n           .replaceAll(\"ScalaJS\\\\.isArrayOf\\\\.\", \"\\\\$isArrayOf_\")\n           .replaceAll(\"ScalaJS\\\\.asArrayOf\\\\.\", \"\\\\$asArrayOf_\")\n           .replaceAll(\"ScalaJS\\\\.\", \"\\\\$\")\n-          .replaceAll(\"\\n(\\\\$[A-Za-z0-9_]+) =\", \"\\nvar $1 =\")\n+          .replaceAll(\"\\n(\\\\$[A-Za-z0-9_]+) =\", \"\\nconst $1 =\")\n+    }\n+\n+    outputMode match {\n+      case OutputMode.ECMAScript51Global | OutputMode.ECMAScript51Isolated =>\n+        content1\n+          .replaceAll(\"(let|const) \", \"var \")","path":"tools/shared/src/main/scala/org/scalajs/core/tools/corelib/CoreJSLibs.scala","position":25,"original_position":25,"commit_id":"f4fa30449f70c0cbee41e88c9463efb23943243a","original_commit_id":"f4fa30449f70c0cbee41e88c9463efb23943243a","user":{"login":"sjrd","id":535934,"avatar_url":"https://avatars.githubusercontent.com/u/535934?v=3","gravatar_id":"","url":"https://api.github.com/users/sjrd","html_url":"https://github.com/sjrd","followers_url":"https://api.github.com/users/sjrd/followers","following_url":"https://api.github.com/users/sjrd/following{/other_user}","gists_url":"https://api.github.com/users/sjrd/gists{/gist_id}","starred_url":"https://api.github.com/users/sjrd/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sjrd/subscriptions","organizations_url":"https://api.github.com/users/sjrd/orgs","repos_url":"https://api.github.com/users/sjrd/repos","events_url":"https://api.github.com/users/sjrd/events{/privacy}","received_events_url":"https://api.github.com/users/sjrd/received_events","type":"User","site_admin":false},"body":"I'll try to come up with something. It's tricky mostly because that can also appear at the very beginning of a line. ","created_at":"2015-04-29T05:00:25Z","updated_at":"2015-04-29T05:00:25Z","html_url":"https://github.com/scala-js/scala-js/pull/1529#discussion_r29310549","pull_request_url":"https://api.github.com/repos/scala-js/scala-js/pulls/1529","_links":{"self":{"href":"https://api.github.com/repos/scala-js/scala-js/pulls/comments/29310549"},"html":{"href":"https://github.com/scala-js/scala-js/pull/1529#discussion_r29310549"},"pull_request":{"href":"https://api.github.com/repos/scala-js/scala-js/pulls/1529"}}},"pull_request":{"url":"https://api.github.com/repos/scala-js/scala-js/pulls/1529","id":31054784,"html_url":"https://github.com/scala-js/scala-js/pull/1529","diff_url":"https://github.com/scala-js/scala-js/pull/1529.diff","patch_url":"https://github.com/scala-js/scala-js/pull/1529.patch","issue_url":"https://api.github.com/repos/scala-js/scala-js/issues/1529","number":1529,"state":"open","locked":false,"title":"A new experimental ECMAScript6 output 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