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                # 異常捕獲 當某一塊代碼出現錯誤與的時候(bug) ,不要停止后面代碼的執行,跳過這個錯誤的bug,繼續執行后面代碼塊,當我們完成了這個項目之后再回來找這個錯誤信息. ## 1.語法 try{ }catch(e){ throw{ } }finally{ } ***** ``` var a = 10; try {/*可能會出錯的代碼塊*/ console.log(a); console.log(b); } catch (e) {/*有錯誤執行里面的代碼,沒有出錯則不會執行里面的代碼 e 錯誤信息*/ console.log("error msg", e); throw {/*手動拋出錯誤信息*/ errorMsg: e,/*錯誤信息*/ errorCode: 101/*錯誤信息編碼 后臺會給予手冊查看 */ } } finally {/*無論上面的程序是否有錯誤,都會執行里面的代碼塊 多用于后端開發中(node.js),用來釋放資源 */ console.log("我繼續執行了"); } // 下面的代碼不會執行 function f() { console.log("我還要繼續執行"); } f(); ```
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