{"action":"opened","issue":{"url":"https://api.github.com/repos/igorprado/react-notification-system/issues/11","labels_url":"https://api.github.com/repos/igorprado/react-notification-system/issues/11/labels{/name}","comments_url":"https://api.github.com/repos/igorprado/react-notification-system/issues/11/comments","events_url":"https://api.github.com/repos/igorprado/react-notification-system/issues/11/events","html_url":"https://github.com/igorprado/react-notification-system/issues/11","id":96810425,"number":11,"title":"Uncaught TypeError: Cannot read property 'firstChild' of undefined","user":{"login":"SrSandeepKumar","id":9007183,"avatar_url":"https://avatars.githubusercontent.com/u/9007183?v=3","gravatar_id":"","url":"https://api.github.com/users/SrSandeepKumar","html_url":"https://github.com/SrSandeepKumar","followers_url":"https://api.github.com/users/SrSandeepKumar/followers","following_url":"https://api.github.com/users/SrSandeepKumar/following{/other_user}","gists_url":"https://api.github.com/users/SrSandeepKumar/gists{/gist_id}","starred_url":"https://api.github.com/users/SrSandeepKumar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/SrSandeepKumar/subscriptions","organizations_url":"https://api.github.com/users/SrSandeepKumar/orgs","repos_url":"https://api.github.com/users/SrSandeepKumar/repos","events_url":"https://api.github.com/users/SrSandeepKumar/events{/privacy}","received_events_url":"https://api.github.com/users/SrSandeepKumar/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2015-07-23T13:11:58Z","updated_at":"2015-07-23T13:11:58Z","closed_at":null,"body":"I am trying add `react-notification-system` into ,my work and started to encounter this error.\r\nI cross checked for difference in `react` library in project, all i made use was `0.13.3`.\r\nwhat i am doing is, \r\n`notification.js`\r\n```\r\nvar NotificationSystem = require('react-notification-system');\r\n\r\nvar NotificationPartial = React.createClass({\r\n    _notificationSystem: null,\r\n    _addNotification: function(event) {\r\n\t    event.preventDefault();\r\n\t    this._notificationSystem.addNotification({\r\n\t      \tmessage: 'Notification message',\r\n\t      \tlevel: 'success'\r\n\t    });\r\n\t},\r\n\tcomponentDidMount: function() {\r\n\t    this._notificationSystem = this.refs.notificationSystem;\r\n\t    this._notificationSystem.addNotification({\r\n\t      \tmessage: 'Notification message',\r\n\t      \tlevel: 'success'\r\n\t    });\r\n\t},\r\n    render : function(){\r\n        return ( <NotificationSystem ref=\"notificationSystem\" /> )\r\n    }\r\n});\r\n\r\nmodule.exports = NotificationPartial;\r\n```\r\n`MainComponent.js`\r\n\r\n```\r\nvar NotificationPartial = require('./NotificationPartial');\r\n---\r\nrender : function(){\r\n\tif(this.state.activeTab){\r\n\t     var notifyMe = <NotificationPartial message={\"this is a message\"}/>;\r\n\t},\r\n\treturn ( <div> {notifyMe} </div> )\r\n}\r\n ```\r\n\r\nWhen i tried to check this, i got \r\n```\r\n**transactionWrappers**\r\n0: Object\r\nclose: () { [native code] }\r\ninitialize: emptyFunction() {}\r\n    arguments: null\r\n    caller: null\r\n    length: 0\r\n    name: \"emptyFunction\"\r\n    prototype: emptyFunction\r\n    thatReturns: makeEmptyFunction(arg) {\r\n    thatReturnsArgument: (arg) { return arg; }\r\n    thatReturnsFalse: () {\r\n    thatReturnsNull: () {\r\n    thatReturnsThis: () { return this; }\r\n    thatReturnsTrue: () {\r\n    __proto__: Empty() {}\r\n   <function scope>\r\n    __proto__: Object\r\n1: Object\r\nclose: () {\r\ninitialize: emptyFunction() {}\r\n    arguments: null\r\n    caller: null\r\n    length: 0\r\n    name: \"emptyFunction\"\r\n    prototype: emptyFunction\r\n    thatReturns: makeEmptyFunction(arg) {\r\n    thatReturnsArgument: (arg) { return arg; }\r\n    thatReturnsFalse: () {\r\n    thatReturnsNull: () {\r\n    thatReturnsThis: () { return this; }\r\n    thatReturnsTrue: () {\r\n    __proto__: Empty() {}\r\n   <function scope>\r\n   __proto__: Object\r\n  length: 2\r\n__proto__: Array[0]\r\n```\r\n\r\n```\r\n**this.wrapperInitData[i]**\r\n0: undefined\r\n1: Object\r\n2: true\r\n3: undefined\r\nlength: 4\r\n```\r\nafter which i got this error\r\nWhere am i going wrong \r\nhow can i rectify the issue?"}}