html checkbox if checked code example

Example 1: if checkbox is checked

if ($('#id_input').is(':checked')) { }

Example 2: get the state of a checkbox

function checkAddress()
{
    var chkBox = document.getElementById('checkAddress');
    if (chkBox.checked)
    {
        // ..
    }
}

Example 3: how to check if input is checked javascript

const cb = document.getElementById('accept');
console.log(cb.checked);