JavaScript naming conventions

JavaScript, Variable, Cheatsheet · Jun 12, 2021

  • Names are case-sensitive, lowercase and uppercase are different.
  • Start variable names with a letter, use camelCase for names.
  • Variable names should be self-descriptive, describing the stored value.
  • Boolean variables are usually prefixed with is or has.
  • Names are case-sensitive, lowercase and uppercase are different.
  • Start function names with a letter, use camelCase for names.
  • Use descriptive names, usually verbs in the imperative form.
  • Common prefixes are get, make, apply etc.
  • Class methods follow the same rules.
  • Names are case-sensitive, lowercase and uppercase are different.
  • Define constants at the top of your file, function or class.
  • Sometimes UPPER_SNAKE_CASE is used, while other times plain camelCase.
  • Names are case-sensitive, lowercase and uppercase are different.
  • Start class names with a capital letter, use PascalCase for names.
  • Use descriptive names, explaining the functionality of the class.
  • Components, which are used in frontend frameworks follow the same rules.
  • Prefix any variable or function with _ to show intention for it to be private.
  • As a convention, this will not prevent other parts of the code from accessing it.

Written by Angelos Chalaris

I'm Angelos Chalaris, a JavaScript software engineer, based in Athens, Greece. The best snippets from my coding adventures are published here to help others learn to code.

If you want to keep in touch, follow me on GitHub.

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