45 lines
1.7 KiB
Markdown
45 lines
1.7 KiB
Markdown
---
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title: JavaScript naming conventions
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shortTitle: Naming conventions
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type: story
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tags: javascript,variable,cheatsheet
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author: chalarangelo
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cover: blog_images/naming-conventions.jpg
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excerpt: Naming conventions, while not easy to enforce, make code easier to read and understand. Learn how to name your variables in JavaScript with this handy guide.
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firstSeen: 2020-05-20T02:32:10+03:00
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lastUpdated: 2021-06-12T19:30:41+03:00
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---
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### Variables
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- Names are case-sensitive, lowercase and uppercase are different.
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- Start variable names with a letter, use `camelCase` for names.
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- Variable names should be self-descriptive, describing the stored value.
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- Boolean variables are usually prefixed with `is` or `has`.
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### Functions
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- Names are case-sensitive, lowercase and uppercase are different.
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- Start function names with a letter, use `camelCase` for names.
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- Use descriptive names, usually verbs in the imperative form.
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- Common prefixes are `get`, `make`, `apply` etc.
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- Class methods follow the same rules.
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### Constant
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- Names are case-sensitive, lowercase and uppercase are different.
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- Define constants at the top of your file, function or class.
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- Sometimes `UPPER_SNAKE_CASE` is used, while other times plain `camelCase`.
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### Classes
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- Names are case-sensitive, lowercase and uppercase are different.
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- Start class names with a capital letter, use `PascalCase` for names.
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- Use descriptive names, explaining the functionality of the class.
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- Components, which are used in frontend frameworks follow the same rules.
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### Private
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- Prefix any variable or function with `_` to show intention for it to be private.
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- As a convention, this will not prevent other parts of the code from accessing it.
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