由字母、数字、下划线、$符号组成，且不能以数字开头
区分大小写
不能是关键字和保留字，例如：case、for、while、function等
变量名尽量有意义
尽量遵守驼峰命名法
| abstract | arguments | boolean | break | byte |
| case | catch | char | class | const |
| continue | debugger | default | delete | do |
| double | else | enum | eval | export |
| extends | false | final | finally | float |
| for | function | goto | if | implements |
| import | in | instanceof | int | interface |
| let | long | native | new | null |
| package | private | protected | public | return |
| short | static | super | switch | synchronized |
| this | throw | throws | transient | true |
| try | typeof | var | void | volatile |
| while | with | yield |
以上内容，在整理时难免有疏漏错误之处，如有发现，可以通过顶部的“联系站长”提出反馈，感谢您的支持！