{"action":"opened","issue":{"url":"https://api.github.com/repos/systemjs/builder/issues/194","labels_url":"https://api.github.com/repos/systemjs/builder/issues/194/labels{/name}","comments_url":"https://api.github.com/repos/systemjs/builder/issues/194/comments","events_url":"https://api.github.com/repos/systemjs/builder/issues/194/events","html_url":"https://github.com/systemjs/builder/issues/194","id":87277187,"number":194,"title":"builder is incapable of loading modules defined without '.js' extension","user":{"login":"vatula","id":450851,"avatar_url":"https://avatars.githubusercontent.com/u/450851?v=3","gravatar_id":"","url":"https://api.github.com/users/vatula","html_url":"https://github.com/vatula","followers_url":"https://api.github.com/users/vatula/followers","following_url":"https://api.github.com/users/vatula/following{/other_user}","gists_url":"https://api.github.com/users/vatula/gists{/gist_id}","starred_url":"https://api.github.com/users/vatula/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vatula/subscriptions","organizations_url":"https://api.github.com/users/vatula/orgs","repos_url":"https://api.github.com/users/vatula/repos","events_url":"https://api.github.com/users/vatula/events{/privacy}","received_events_url":"https://api.github.com/users/vatula/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-06-11T09:28:16Z","updated_at":"2015-06-11T09:28:16Z","closed_at":null,"body":"When I have this in index.js (an entry point)\r\n\r\n```\r\nimport {AbstractClassError} from './errors.js';\r\nimport {SomeFile}                   from './somefile';\r\nimport {SomePlugin}                   from './someplugin.js';\r\n\r\nexport {AbstractClassError, SomeFile, SomePlugin};\r\n```\r\n\r\nthen builder throws exception:\r\n\r\n```\r\nTrace: [Error: ENOENT, open 'j:\\oddy\\workspace\\github\\proj\\src\\main\\javascript\\com\\lorem\\ipsum\\somefile'\r\n\tError loading file:///j:/oddy/workspace/github/proj/src/main/javascript/com/lorem/ipsum/somefile from file:///j:/oddy/workspace/github/proj/src/main/javascript/com/lorem/ipsum/index.js\r\n\tError loading file:///j:/oddy/workspace/github/rustie/src/main/javascript/com/robobeak/rustie/somefile]\r\n```\r\n\r\nWhen I define an extension to **somefile**, then the error is gone.\r\n\r\nIt is acceptable to have modules without extensions.\r\nNo other builders/transpilers/IDEs have issues in recognizing modules without extension in this list:\r\n\r\n * webpack (builder)\r\n * traceur (transpiler)\r\n * babel (transpiler)\r\n * browserify  (builder)\r\n * Intellij IDEA (IDE)"}}