Naming variables in JavaScript
David Y.
—The problem
How should I name the variables in my JavaScript code?
The solution
- Variable names must start with a letter, an underscore (
_) or a dollar sign ($). - Variable names cannot contain spaces.
- Variables cannot be the same as reserved keywords such as
iforconst. - By convention, JavaScript variable names are written in camelCase.
- Variables should be given descriptive names that indicate their content and usage (e.g.
sellingPriceandcostPricerather thanxandy). - As JavaScript variables do not have set types, it can be useful to include an indication of the type in the name (e.g.
orderNumberis obviously a numeric ID, whereasordercould be an object, a string or anything else).
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