Explain the finally Statement in JavaScript with examples.

Javascript Web Development Object Oriented Programming

The finally statement always executes after try and catch block regardless of if there was an error or not.

Following is the code for the finally statement in JavaScript −

Example

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .result,.sample {
      font-size: 20px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>Finally in Javascript</h1>
<div class="sample"></div>
<div style="color: green;" class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above button to call a variable before it is defined
</h3>
<script>
   let sampleEle = document.querySelector(".sample");
   let resEle = document.querySelector(".result");
   document.querySelector(".Btn").addEventListener("click", () => {
      try {
         resEle.innerHTML = a;
      }
      catch (err) {
         resEle.innerHTML = "Error = " + err;
      }
      finally {
         sampleEle.innerHTML = "The code inside finally has been executed";
      }
      let a = 44;
   });
</script>
</body>
</html>