# JavaScript Reference

## JavaScript Reference

### JavaScript keywords

Below are the JavaScript keywords. They cannot be used as variables, functions, or object identifiers.

| JavaScript Keywords |          |            |        |
| ------------------- | -------- | ---------- | ------ |
| break               | do       | instanceof | typeof |
| case                | else     | new        | var    |
| catch               | finally  | return     | void   |
| continue            | for      | switch     | while  |
| debugger            | function | this       | with   |
| default             | if       | throw      |        |
| delete              | in       | try        |        |

In addition, the literals null, true, and false are reserved for their standard usage.

### JavaScript reserved keywords

The EcmaScript specification has the following list of words reserved for future use. You should not use these as identifiers in your JavaScript code.

| JavaScript Reserved Keywords |            |           |        |
| ---------------------------- | ---------- | --------- | ------ |
| class                        | implements | package   | static |
| enum                         | import     | private   | super  |
| export                       | interface  | protected | yield  |
| extends                      | let        | public    |        |

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