else Conditions

Checks if there are any else condition in the script block. This is a code smell because it can be hard to read and understand.

❓ Why it's good to follow this rule?

• Readability: Code without else conditions is easier to read and understand.
• Maintainability: Code without else conditions is easier to maintain and refactor.
• Testability: Code without else conditions is easier to test.

😱 Examples of code for which this rule will throw a warning

DANGER

The following code contains an else clause. It indicates that the logic could potentially be simplified to avoid using the else statement altogether.

function checkUserStatus(isLoggedIn) {
  if (isLoggedIn) {
    console.log('Welcome back!')
  }
  else {
    console.log('Please log in.')
  }
}

🤩 How to fix it?

TIP

Refactor the code to avoid the else clause by using a guard clause or combining the conditions into a single if statement. This will enhance readability and reduce complexity.

function checkUserStatus(isLoggedIn) {
  if (!isLoggedIn) {
    console.log('Please log in.')
    return // Early return to eliminate else
  }
  console.log('Welcome back!')
}