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Update Breaking changes in TypeScript 2.8 (zhongsp#234)
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‎README.md‎

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* [TypeScript 1.3](./doc/release-notes/TypeScript%201.3.md)
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* [TypeScript 1.1](./doc/release-notes/TypeScript%201.1.md)
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* [Breaking Changes](./doc/breaking-changes/breaking-changes.md)
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* [TypeScript 2.8](./doc/breaking-changes/TypeScript%202.8.md)
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* [TypeScript 2.7](./doc/breaking-changes/TypeScript%202.7.md)
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* [TypeScript 2.6](./doc/breaking-changes/TypeScript%202.6.md)
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* [TypeScript 2.4](./doc/breaking-changes/TypeScript%202.4.md)

‎doc/breaking-changes/TypeScript 2.8.md‎

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# TypeScript 2.8
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## 在`--noUnusedParameters`下检查未使用的类型参数
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根据 [#20568](https://github.com/Microsoft/TypeScript/issues/20568)，未使用的类型参数之前在`--noUnusedLocals`下报告，但现在报告在`--noUnusedParameters`下。
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## 从`lib.d.ts`中删除了一些Microsoft 专用的类型
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从DOM定义中删除一些Microsoft 专用的类型以更好地与标准对齐。 删除的类型包括：
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* `MSApp`
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* `MSAppAsyncOperation`
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* `MSAppAsyncOperationEventMap`
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* `MSBaseReader`
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* `MSBaseReaderEventMap`
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* `MSExecAtPriorityFunctionCallback`
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* `MSHTMLWebViewElement`
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* `MSManipulationEvent`
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* `MSRangeCollection`
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* `MSSiteModeEvent`
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* `MSUnsafeFunctionCallback`
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* `MSWebViewAsyncOperation`
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* `MSWebViewAsyncOperationEventMap`
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* `MSWebViewSettings`
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## `HTMLObjectElement`不再具有`alt`属性
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根据 [#21386](https://github.com/Microsoft/TypeScript/issues/21386)，DOM库已更新以反映WHATWG标准。
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如果需要继续使用`alt`属性，请考虑通过全局范围中的接口合并重新打开`HTMLObjectElement`：
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```ts
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// Must be in a global .ts file or a 'declare global' block.
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interface HTMLObjectElement {
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alt: string;
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}
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```

‎doc/breaking-changes/breaking-changes.md‎

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# Breaking Changes
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* [TypeScript 2.8](./TypeScript 2.8.md)
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* [TypeScript 2.7](./TypeScript 2.7.md)
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* [TypeScript 2.6](./TypeScript 2.6.md)
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* [TypeScript 2.4](./TypeScript 2.4.md)

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