How can I check if a checkbox is checked?

Question

I am building a mobile web app with jQuery Mobile and I want to check if a checkbox is checked. Here is my code.

Answer 1

This should work

    function validate() {
        if ($('#remeber').is(':checked')) {
            alert("checked");
        } else {
            alert("You didn't check it! Let me check it for you.");
        }
    }

Answer 2

checked is boolean property so you can directly use it in IF condition:-

 <script type="text/javascript">
    function validate() {
        if (document.getElementById('remember').checked) {
            alert("checked");
        } else {
            alert("You didn't check it! Let me check it for you.");
        }
    }
    </script>

Answer 3

Use this below simple code: https://jsfiddle.net/Divyesh_Patel/v7a4h3kr/7/

<input type="checkbox" id="check">
<a href="#" onclick="check()">click</a>
<button onclick="check()">button</button>
<script>
 function check() {
    		if (document.getElementById('check').checked) {
            alert("checked");
        } else {
            alert("Not checked.");
        }
       
    }

</script>

Answer 4

You can also use JQuery methods to accomplish this:

<script type="text/javascript">
if ($('#remember')[0].checked) 
{
 alert("checked");
}
</script>

Answer 5

I am using this and it works for me with Jquery:

Jquery:

var checkbox = $('[name="remember"]');

if (checkbox.is(':checked'))
{
    console.log('The checkbox is checked');
}else
{
    console.log('The checkbox is not checked');
}

Is very simple, but work's.

Regards!

Answer 6

Try This

<script type="text/javascript">
window.onload = function () {
    var input = document.querySelector('input[type=checkbox]');

    function check() {
        if (input.checked) {
            alert("checked");
        } else {
            alert("You didn't check it.");
        }
    }
    input.onchange = check;
    check();
}
</script>