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                # 介紹 * 為對象添加新功能 * 不改變其原有的結構和功能 # 在項目中使用裝飾器模式 **可以通過babel在項目中使用** * 命令行: babel 6.x 使用`babel-plugin-transform-decorators-legacy`插件: `npm install babel-plugin-transform-decorators-legacy --save-dev` babel 7.x使用`@babel/plugin-proposal-decorators`插件: `npm install @babel/plugin-proposal-decorators --save-dev` * 編輯`.babelrc`文件 ``` { "presets": ["@babel/preset-env"], "plugins": [ ["@babel/plugin-proposal-decorators", {"legacy":true}] ] } ``` ![](https://img.kancloud.cn/2a/f4/2af40cb1f1e4bea5394ca38930ec66f4_902x1084.png) ![](https://img.kancloud.cn/fe/e1/fee1d786645c00251277fb99e5bd5c88_1694x1264.png) ![](https://img.kancloud.cn/9d/78/9d78184e204b320f5a17d15fb5a5edc1_2146x830.png) ![](https://img.kancloud.cn/2f/a9/2fa9fc46bc35a689d9436c7d84e72e8f_2488x1230.png) ![](https://img.kancloud.cn/77/c2/77c29202dd9ee6712c53a2797e46cd67_1708x824.png) # 第三方裝飾器 **core-decorators** * 第三方開源lib * 提供常用的裝飾器 * 文檔[鏈接][https://github.com/jayphelps/core-decorators](https://github.com/jayphelps/core-decorators) * 使用示例 ![](https://img.kancloud.cn/15/f8/15f8849f84b17cc27cffa79540fe6dca_1404x1070.png) # 設計原則驗證 * 將現有對象和裝飾器進行分離,兩者獨立存在 * 符合開放封閉原則
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