Use consistent capitalization

Choose a capitalization style for variables, functions, and other identifiers, and adhere to it throughout your codebase. Consistency improves code readability.


πŸ“ Guideline

Use consistent capitalization: Choose a capitalization style for variables, functions, and other identifiers, and adhere to it throughout your codebase.

Capitalization rules in JavaScript are subjective. However, it's crucial to establish a consistent capitalization style within your team or project. Consistency improves code readability and reduces confusion.

πŸ› οΈ How to Apply

  • Choose a capitalization convention: Decide whether to use camel case, Pascal case, or another convention for your variables, functions, and other code elements. Stick to the chosen convention throughout the project. πŸͺ
  • Document the chosen convention: Clearly document the capitalization convention chosen by your team, so that everyone is aware of and follows the agreed-upon style. πŸ“„
  • Automate capitalization checks: Use linting tools or code formatters to automatically check and enforce consistent capitalization throughout the codebase. πŸ”

Pros and Cons

πŸ‘ Pros

  • Enhances code readability: Consistent capitalization improves code readability and makes it easier for developers to understand and navigate the codebase. πŸ‘οΈ
  • Maintains code coherence: By following a consistent capitalization style, the codebase maintains a cohesive and professional appearance. 🌟
  • Facilitates collaboration: Team members can easily understand and navigate each other's code, leading to smoother collaboration and reduced chances of misunderstandings or errors. 🀝

πŸ‘Ž Cons

  • Subjective nature: Capitalization rules in JavaScript are subjective, leading to potential differences of opinion within the team. ❓
  • Codebase integration: Enforcing consistent capitalization across an existing codebase with varied capitalization styles can be time-consuming and may require refactoring efforts. ⏰


❌ Bad

let User_Name = "John Doe";
function Get_user_details() {
  // Code here
const my_Constant = 42;

βœ… Good

let userName = "John Doe";
function getUserDetails() {
  // Code here
const MY_CONSTANT = 42;


  • Naming conventions: Consistent capitalization is closely related to naming conventions. πŸ‘₯
  • Code readability: Consistent capitalization is one aspect of maintaining code readability, which involves various practices to make code more understandable. πŸ‘οΈ