Get all List Items using JavaScript

var clientContext = new SP.ClientContext('https://sharepointtest.com');
var targetList = clientContext.get_web().get_lists().getByTitle('Documents');

var query = SP.CamlQuery.createAllItemsQuery();

var allDocs = targetList.getItems(query);
clientContext.load(allDocs);

clientContext.executeQueryAsync(function(sender, args)
{
    var listItemEnumerator = allDocs.getEnumerator();
    while (listItemEnumerator.moveNext())
    {
        var oListItem = listItemEnumerator.get_current();
        console.log("Title: " + oListItem.get_item('Title'));
    }
},

function(sender, args)
{
    console.log('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
});