{"action":"opened","issue":{"url":"https://api.github.com/repos/vega/vega/issues/862","repository_url":"https://api.github.com/repos/vega/vega","labels_url":"https://api.github.com/repos/vega/vega/issues/862/labels{/name}","comments_url":"https://api.github.com/repos/vega/vega/issues/862/comments","events_url":"https://api.github.com/repos/vega/vega/issues/862/events","html_url":"https://github.com/vega/vega/issues/862","id":236690055,"number":862,"title":"Use uglifyjs-es6","user":{"login":"nyurik","id":1641515,"avatar_url":"https://avatars3.githubusercontent.com/u/1641515?v=3","gravatar_id":"","url":"https://api.github.com/users/nyurik","html_url":"https://github.com/nyurik","followers_url":"https://api.github.com/users/nyurik/followers","following_url":"https://api.github.com/users/nyurik/following{/other_user}","gists_url":"https://api.github.com/users/nyurik/gists{/gist_id}","starred_url":"https://api.github.com/users/nyurik/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nyurik/subscriptions","organizations_url":"https://api.github.com/users/nyurik/orgs","repos_url":"https://api.github.com/users/nyurik/repos","events_url":"https://api.github.com/users/nyurik/events{/privacy}","received_events_url":"https://api.github.com/users/nyurik/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-06-17T23:30:10Z","updated_at":"2017-06-17T23:30:10Z","closed_at":null,"body":"Vega seems to be using a lot of ES6 features, such as object destructuring assignments, and yet it use uglifyjs, not uglifyjs-es6. Also, there is a note that IE10 & 11 are also supported [here](https://vega.github.io/vega/usage/#ie), but IE11 does not support many other features either. According to http://gs.statcounter.com/, IE usage is at 4% and dropping. Is it even worth supporting and jumping through tons of hoops?"}}
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