{"action":"opened","issue":{"url":"https://api.github.com/repos/d3/d3-color/issues/15","labels_url":"https://api.github.com/repos/d3/d3-color/issues/15/labels{/name}","comments_url":"https://api.github.com/repos/d3/d3-color/issues/15/comments","events_url":"https://api.github.com/repos/d3/d3-color/issues/15/events","html_url":"https://github.com/d3/d3-color/issues/15","id":99969257,"number":15,"title":"Doesn't work in IE11-","user":{"login":"Calvein","id":243189,"avatar_url":"https://avatars.githubusercontent.com/u/243189?v=3","gravatar_id":"","url":"https://api.github.com/users/Calvein","html_url":"https://github.com/Calvein","followers_url":"https://api.github.com/users/Calvein/followers","following_url":"https://api.github.com/users/Calvein/following{/other_user}","gists_url":"https://api.github.com/users/Calvein/gists{/gist_id}","starred_url":"https://api.github.com/users/Calvein/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Calvein/subscriptions","organizations_url":"https://api.github.com/users/Calvein/orgs","repos_url":"https://api.github.com/users/Calvein/repos","events_url":"https://api.github.com/users/Calvein/events{/privacy}","received_events_url":"https://api.github.com/users/Calvein/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-08-10T04:37:30Z","updated_at":"2015-08-10T04:37:30Z","closed_at":null,"body":"I'm not sure if it's an actual issue because I don't know the browser support for this but [Map](https://github.com/d3/d3-color/blob/3767ff95cbe59625cf6f3997449b5987919ad852/src/color.js#L37) isn't supported in IE10- and in IE11, [`Map.prototype.set` does't return `this`](http://kangax.github.io/compat-table/es6/#Map_Map.prototype.set_returns_this)."}}