Checkbox checked validation using JavaScript

You can check whether a checkbox is checked or not using checkbox_elemnt.checked attribute.

Here is an example:

Here is the JavaScript code for easy reference:

function validateForm(form) {  console.log("checkbox checked is ", form.agree.checked);  if(!form.agree.checked)  {  document.getElementById('agree_chk_error').style.visibility='visible';  return false;  }  else  {  document.getElementById('agree_chk_error').style.visibility='hidden';  return true;  } } 

See Also

• How to do multiple checkbox validation in Javascript
• Checkbox validation using jQuery
• HTML Form Checkbox with required validation
• Google reCaptcha 2 JavaScript Validation (client side)
• Custom styled checkboxes with Bootstrap
• HTML Form with Checkboxes examples and sample code
• How to create a dropdown with checkbox options with Bootstrap Style
• How to create checkbox in Bootstrap style ?
• How to get checkbox value in form submission