Why is this an issue?

A switch statement is a control flow statement that allows you to execute different blocks of code based on the value of an expression. It provides a more concise way to handle multiple conditions compared to using multiple if-else statements.

If you only have a single condition to check, using an if statement is simpler and more concise. switch statements are designed for handling multiple cases, so using them for a single condition can be overkill and less readable.

This rule raises an issue when a switch statement has only one case clause and possibly a default one.

switch (condition) { // Noncompliant: The switch has only one case and a default
  case 0:
    doSomething();
    break;
  default:
    doSomethingElse();
    break;
}

Use a switch statement when you have multiple cases to handle and an if statement when you have only one condition to check.

if (condition === 0) {
  doSomething();
} else {
  doSomethingElse();
}

Resources

Documentation

• MDN web docs - switch
• MDN web docs - if...else