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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Incorrect/overly strong `this` inference for POJOs","articleBody":"**TypeScript Version:** \n\nnightly (1.9.0-dev.20160419)\n\n**Code**\n\n``` ts\nEmber.Object.extend({\n  init() {\n    this._super();\n//  ^~~~ error TS2339: Property '_super' does not exist on type '{ init(): void; }'.\n    ...\n  }\n});\n```\n\n**Expected behavior:**\n\n`this` should be inferred as `any`\n\n**Actual behavior:**\n\n`this` is inferred to be `{ init(): void; }`\n\n---\n\nThis changed somewhere between `typescript@1.9.0-dev.20160319` and `typescript@1.9.0-dev.20160419`. I believe it is unsafe to assume anything about the `this` on the \"methods\" on a POJO, as there are several common patterns in JavaScript that breaks this assumption (using POJOs as an \"options\" or \"extensions\" dictionary).\n","author":{"url":"https://github.com/chancancode","@type":"Person","name":"chancancode"},"datePublished":"2016-04-19T19:42:37.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":21},"url":"https://github.com/8191/TypeScript/issues/8191"}