Wordpress Ajax always returns 0

Question

So I am trying to make a form that validates if an url exists dynamically and am having problems with Wordpress ajax call ALWAYS returning 0. I have also been researching for about 3 hours now about this and nothing seems to work for me, it might be a dumb question. Here is what I have done so far:

I have a button:

<input id="analyze"type="button" class="analyze-button" value="Analyze">

And I am trying to run this script on it (located in another file):

$( document ).on( 'click', '#analyze', function() {



$.ajax({
        url: checkurl.ajax_url,    
        type:'POST',
        data:{
            action: 'checkUrl',
            //link_check : $('#main-input').val(),

        },

        success: function(msg){
            alert(msg);
        },
        error:function(msg){
            alert("Error");
        }

    });})

This is how I added the ajax hooks:

add_action( 'wp_ajax_nopriv_checkUrl', 'checkUrl' );
add_action( 'wp_ajax_post_checkUrl', 'checkUrl' );

function checkUrl() {
 echo "I works1";
if ( defined( 'DOING_AJAX' ) && DOING_AJAX ) { 
    //$url = $_POST['main-input'];
    //echo $url;
    echo "I work";
}

echo "I works";

    die();
}

And this is how I enqueued the script:

function ajax_contact() {
wp_enqueue_script( 'ajaxcontact', get_template_directory_uri() .'/templates/ajaxcontact.js', array('jquery'), '1.0', true );

wp_localize_script( 'ajaxcontact', 'checkurl', array(
    'ajax_url' => admin_url( 'admin-ajax.php' )
));
}
add_action( 'wp_enqueue_scripts', 'ajax_contact' );

Last 2 code snippets were from function.php

What am I doing wrong? I tried a lot of things, but with no luck so far.

This is the link to the page where I have the form. It is a test page right now. Maybe this helps.