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                JavaScript 有一些保留字不能在標識符中使用。 保留字對 JavaScript 語言有特殊的含義,它們是語言語法的一部分。使用保留字在加載腳本的時候將產生編譯錯誤。 ## 保留詞 ||||||| |-|-|-|-|-| | break | delete | function | return | typeof | | case | do | if | switch | var | | catch | else | in | this | void | | continue | false | instanceof | throw | while | | debugger | finally | new | true | with | | default | for | null | try | | ## 為將來保留的詞 ||||||| |-|-|-|-|-| | abstract | double | goto | native | static | | boolean | enum | implements | package | super | | byte | export | import | private | synchronized | | char | extends | int | protected | throws | | class | final | interface | public | transient | | const | float | long | short | volatile | >[danger] 當選擇標識符時避免使用已經在內部 Jscript 對象或函數中使用的詞,如 **String** 或 **parseInt**。
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