check if checkbox is checked javascript

In web development, you might often find yourself in a situation where you need to check whether a checkbox is checked or not using JavaScript. This simple article will guide you on how to easily accomplish that.

Code snippet for checking if a checkbox is checked

Here is the simple JavaScript code snippet you can use:

var checkbox = document.getElementById('check');
if (checkbox.checked) {
   // Checkbox is checked
} else {
   // Checkbox is not checked
}

In this code, ‘check’ is the ID of the checkbox you are trying to check.

Code Explanation for checking if a checkbox is checked

Let’s break down the above JavaScript code snippet step by step:

1. Assign the checkbox to a variable: To make our work easier, we first assign the checkbox we want to check to a variable. This is done by using the document.getElementById() function where ‘check’ is the ID of the checkbox we want to check.

   var checkbox = document.getElementById('check');

2. Check if the checkbox is checked: Using an if-else statement, we can now determine if the checkbox is checked or not. Here we are using the .checked property of the checkbox element which returns a Boolean indicating whether the checkbox is checked or not.

   if (checkbox.checked) {
      // Checkbox is checked, write your logic here
   } else {
      // Checkbox is not checked, write your logic here
   }

So, with this simple JavaScript code, you can easily check whether a checkbox is checked or not and run specific code depending on the checkbox’s state. This can be especially useful in forms or anywhere you need a user to agree or verify something before proceeding.