- Can begin with a letter, underscore (
_) or dollar sign (
- Can only contain letters, numbers, underscores, or dollar signs;
- Cannot contain spaces;
- Is case-sensitive.
For example, the following are all valid variable names:
const foo = 'bar'; const $foo = 'bar'; const _foo = 'bar'; const _123foo = 'bar'; const foo_bar123$ = 'bar'; const fooBar = 'bar';
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