How to Handle Multiple Cases in a JavaScript Switch Statement

Multiple Cases in Switch Statements: A JavaScript Conundrum

Often, programmers desire the ability to handle multiple cases within a single switch statement in JavaScript. However, the traditional syntax of switch statements only allows for one case per case statement. This can lead to repetitive code and violate the DRY (Don't Repeat Yourself) principle.

Alternative Solution: Leveraging Fall-Through

Fortunately, JavaScript provides a solution through the fall-through feature of the switch statement. By omitting a break statement after a matched case, the execution will fall through to the next case. This behavior allows you to handle multiple cases consecutively, as seen in the modified example below:

<code class="javascript">switch (varName) {
  case "afshin":
  case "saeed":
  case "larry":
    alert("Hey");
    break;
  default:
    alert("Default case");
}</code>

In this modified example, when the value of varName matches any of the three cases ("afshin", "saeed", or "larry"), the alert("Hey") statement will execute. The break statement is only used after the last matched case to prevent further execution.

By leveraging the fall-through feature, you can effectively handle multiple cases without duplicating code. This simplifies your code, promotes readability, and adheres to the DRY principle.

The above is the detailed content of How to Handle Multiple Cases in a JavaScript Switch Statement. For more information, please follow other related articles on the PHP Chinese website!