SharePoint : JSOM code to get the list from URL

clientContext = SP.ClientContext.get_current();
web =clientContext.get_web();

allLists = web.get_lists();

clientContext.load(allLists, 'Include(DefaultDisplayFormUrl)');
clientContext.executeQueryAsync(function (sender, args) {
        var myList = getListFromUrl('Lists/myList/');
    }, function(){alert("Getting list failed");});

function getListFromUrl(listUrl) {
      var mylist;

    try {
        var enumerator = allLists.getEnumerator();

        while (enumerator.moveNext()) {
            var currentList = enumerator.get_current();

            if ((currentList.get_defaultDisplayFormUrl() != null) && (currentList.get_defaultDisplayFormUrl().indexOf(listUrl) != -1)) {
                mylist= currentList;
                break;
            }
        }
    }
    catch (err) {
       //error handling
    }

    return mylist;
}