Get toggle checkbox status is it true or Not

html code

<input type="checkbox" name="toggle" id="switch">
   <label for="switch">Toggle</label>

css

input[type=checkbox] {
    width: 0;
    height: 0;
    visibility: hidden;
}

label {
    cursor: pointer;
    text-indent: -9999px;
    width: 50px;
    height: 20px;
    background: grey;
    display: block;
    border-radius: 100px;
    position: relative;
}

label:after {
    content: '';
    position: absolute;
    top: 3px;
    left: 3px;
    width: 14px;
    height: 14px;
    background: #fff;
    border-radius: 90px;
    transition: 0.3s;
}

input:checked + label {
    background: #bada55;
}

input:checked + label:after {
    left: calc(100% - 5px);
    transform: translateX(-100%);
}

label:active:after {
    width: 30px;
}

jquery script

$('input').on("change", function () {
    if ($('input[type="checkbox"].is(":checked")')) {
        alert("its checked");
    }
});

in this, i do not get a status of checkbox is it true or false I try my best I did not get any solution. when click on toggle its always give me a false value please help me.