# 從頭開始 javascript 的學習紀錄 語法(3) ###### tags: `JavaScript 學習歷程` * 模組化 ```shell= #初始化 npm init ```  - 點開package.json,加上 ```json= "type":"moudle", ``` - index.js ```javascript= let myname = "Rex"; export { myname }; ``` - text.js ```javascript= import { myname } from "./index.js"; console.log(myname); //Rex ``` - p.s也可以用export { ? as ? } 做處理 - try......catch......finally ```javascript= try { console.log('Hello world'); } catch(err) { console.log("error"); } finally { console.log("error"); } //Hello world //error ``` {%hackmd S1DMFioCO %}
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