<?php
public function delete($vars)
{
    $type=$_POST['type'];
    $status = array("status" => "success");
    echo json_encode($status);
}
?>

//Script from HTML
<script>
    function initiate_delete() {
        $.ajax({
            url: '{$modulelink}&action=delete',
            type: "post",    //request type,
            dataType: 'json',
            data: { type: 'test' }
        }).done(function (data) {
            console.log(data.status);
        });
    }
</script>