← Blog · 2026-04-16 · ConvertCaseHQ Team · 1 min read

JavaScript Variable Naming: The Developer's Guide to camelCase

JavaScript convention is remarkably consistent across style guides. Use camelCase for variables, functions, and object properties. Use PascalCase for classes and React components. Reserve CONSTANT_CASE for true constants (values known at program start).

const userName = "alice";     // camelCase
class UserProfile {}          // PascalCase
const MAX_RETRIES = 3;        // CONSTANT_CASE

Avoid snake_case in JS — it's reserved for interop with non-JS APIs (Python backends, SQL columns).