## Query
查询类元数据。
查看`ContentChildren`, `ContentChild`, `ViewChildren`和`ViewChild`了解更多信息。
### 类定义
```typescript
class Query {
descendants : boolean
first : boolean
read : any
isViewQuery : boolean
selector : any
}
```
- 说明
- angular 1.x
- ngModelController
- ngOptions
- ngModelOptions
- lifecycle
- directive
- angular 2
- @angular/forms
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- bug记得
- @angular/http
- 类
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- Request
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- @angular/core
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- Query
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- Zone
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- 指令
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- bootstrap4
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- 重点关注博客
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- 将字符串解析成DOM
- rx相关
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