TypeScript中的@符号是什么? [英] What is the @ symbol in TypeScript?

问题描述

我正在学习Angular，而且我也是TypeScript的新手，所以我的问题是:为什么在组件或指令中，元数据或修饰符会带有"@"符号，例如 @Component / @Directive .

I´m learning Angular and I´m new with TypeScript too, so my question is: why in components or directives do the metadata or decorators have the "@" symbol like this @Component/@Directive.

它的目的是什么，什么时候应该使用它?

What is the purpose of it, and when should I use it?

推荐答案

它代表装饰器.它不是TypeScript专用的.

It stands for decorators. It is not TypeScript specific.

Google"javascript装饰器"进一步了解它.

Google "javascript decorator" to learn more about it.

例如:

http://javascript.info/tutorial/decorators

https://medium.com/google-developers/Exploration-es7-decorators-76ecb65fb841#.jzu13e5lr

有关其标准实现以及何时最终发布(最新的ECMAScript版本)的最新信息，请参阅以下页面: https://github.com/tc39/proposal-decorators

For up to date information about their standard implementation and when it will finally be released (future ECMAScript versions), see this page: https://github.com/tc39/proposal-decorators

正如@hardikModha所提到的，您还可以查阅TypeScript手册: http://www.typescriptlang.org/docs/handbook/decorators.html

And as @hardikModha mentioned, you can also look up the TypeScript handbook: http://www.typescriptlang.org/docs/handbook/decorators.html

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