Sentry Answers>JavaScript>

Naming variables in JavaScript

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 if or const.
  • By convention, JavaScript variable names are written in camelCase.
  • Variables should be given descriptive names that indicate their content and usage (e.g. sellingPrice and costPrice rather than x and y).
  • As JavaScript variables do not have set types, it can be useful to include an indication of the type in the name (e.g. orderNumber is obviously a numeric ID, whereas order could be an object, a string or anything else).
  • ResourcesImprove Web Browser Performance - Find the JavaScript code causing slowdowns
  • SentryJavascript Error Monitoring & Tracing
  • ResourcesJavaScript Frontend Error Monitoring 101
  • Syntax.fmListen to the Syntax Podcast
  • Syntax.fm logo
    Listen to the Syntax Podcast

    Tasty treats for web developers brought to you by Sentry. Get tips and tricks from Wes Bos and Scott Tolinski.

    SEE EPISODES

Considered “not bad” by 4 million developers and more than 100,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.

© 2024 • Sentry is a registered Trademark
of Functional Software, Inc.