kendo extend existing widget

's YUI library use the nested object namespacing pattern regularly. // Option 1: var myApplication = myApplication || {}; jQuery.fn.ready() is powered by jQuery.bindReady(), seen below: Whilst not directly used in jQuery core, some developers may also be familiar with the concept of LazyLoading via plugins such as this. // with a MacbookDecorator, class CaseDecorator extends MacbookDecorator { takeOrders('Xpresso', 3); // Our default vehicleClass is Car bindingAccessor.call(bindingContext.$data) : bindingAccessor; this.next = function () { // to make things interesting, let's say it's a namespace so bad" } This free e-book provides high-level strategies for migrating existing apps written for ASP.NET MVC and Web API (.NET Framework 4.x) to .NET 6. } Select all of the elements in the page and then store references to them. * Licensed under the MIT license new Tooltip(); We can also self-initialize this widget whenever a new page in jQuery Mobile is created. } console.log( "Caching is: " + ( this.myConfig.useCaching ? In response to your comments and updates to the original post: I'm typing this off the top of my head, so my apologies if it doesn't work if you directly copy/paste it, but assuming you have a DataSource laoding the data, you could use the schema.parse method to turn your data into an actual array, like: The idea is that if your server returned the object: Then the parse function would convert it to the Array: Which you can then MVVM bind to a widget like normal. // Check the counter value and reset Regardless of whether or not document.createElement is used to create a new element, a reference to the element (found or created) is injected into the returned object so further methods such as .attr() can be easily used on it right after. // options: an object containing configuration options for the singleton window.attachEvent('onload', jQuery.ready); const carFactory = new VehicleFactory(); return this._instance; require(["dojo/_base/customStore"], function( store ){ Modules became available in JavaScript with ES2015 and can be used to implement the module pattern here. console.log( decoratedMacbookPro.getPrice() ); // define the objects we're going to use In event bubbling, the event is captured and given to the inner-most element and then propagated to the outer elements.One of the best metaphors for describing Flyweights in this context was written by Gary Chisholm and it goes a little like this:Try to think of the flyweight in terms of a pond. This helps to prevent conflicts between classes or function names included in different modules.PrivacyThe Module pattern encapsulates "privacy", state and organization using closures. _counter.set(this, 0); console.log( "event end" ); } `Caching is: ${this.myConfig.useCaching ? What is the limit to my entering an unlocked home of a stranger to render aid without explicit permission. if (!topics[topic]) { let civic = new Car('Honda Civic', 2009, 20000); Our manager will be storing both and will also include checkout-related logic we stripped out during our flyweight optimization of the Book class. Study the pros and cons of each pattern before employing them. Basic consumption of exports The Observer pattern was used for letting the View know whenever the Model was updated or modified. } // of 5000 We must: (a) Leave "defaults" in an untouched state where we don't lose the ability to access the properties or functions found in it a later point (b) Gain the ability to use the decorated properties and functions found in "options". }, break; } var superman = new Superhero( "Clark", "Kent", ["flight","heat-vision"] ); driveForward() { types[type] = Vehicle; this.getFlavor = () => flavor; In addition, it enables us to decouple objects invoking the action from the objects which implement them, giving us a greater degree of overall flexibility in swapping out concrete classes (objects).Concrete classes are best explained in terms of class-based programming languages and are related to the idea of abstract classes. Because the code is more portable, it can be easily moved to other locations (or around the file-system) without needing to alter the code itself or change its module ID. // The extends clause accepts arbitrary expressions that return classes or constructors ); * Licensed under the MIT license // the base widget var truck = new Vehicle( "truck" ); But using our patterns inline approach, the following would be possible: this.model = modelName; Models may trigger events but it's the presenters role to subscribe to them so that it can update the view. getRandomNumber() { myModule.reportMyConfig(); } console.log(secondInstance); next += $.isPlainObject(val) ? myModule.publicMethod(); An interface is a way of defining the methods an object should have, however, it doesn't actually directly specify how those methods should be implemented. $.each( ["john","dave","rick","julian"], function( index, value ) { Ive listed them inline with each pattern so that one can read up on their individual work if interested. // vehicle: car, model:default, license: 00000-000. ); }, return module; _.extend( PersonAnimator.prototype, myMixins ); flavors.push(flavorFactory.getCoffeeFlavor(flavorIn)); That said, if we're opting for this technique, we may be equally as interested in the Module pattern. //Our dijit tooltip is now available for local use Calling module.facade() will actually trigger a set of private behavior within the module, but again, the user isn't concerned with this. For smaller applications wishing to expose a nested API for a particular self-enclosed module, we may just find ourselves using the Revealing Module Pattern, which we covered earlier in the book: The benefit of object literals is that they offer us a very elegant key/value syntax to work with; one where we're able to easily encapsulate any distinct logic or functionality for our application in a way that clearly separates it from others and provides a solid foundation for extending our code. this.dueReturnDate = newReturnDate; // 2. decoratorApp = { console.log( "What is Paul Irish debugging today?" // defaults -- { validate: false, limit: 5, name: foo, welcome: function (){ console.log("welcome! store : $( "#flickrSearch" ).submit( function( e ) {, // Subscribe to new tags being published and perform car.getModel(); }); } new Vehicle(customizations) : null); } flavor = new CoffeeFlavor(flavorName); }).done( callback ); * Licensed under the MIT license jQuery core has come with built-in support for a publish/subscribe-like system for a few years now, which it refers to as custom events. this.color = color; // Define the prototypes and utilities for this factory This isn't a problem with Backbone itself per se as it purposefully attempts to stay out of the UI. `total CoffeeFlavor objects made: ${flavorFactory.getTotalCoffeeFlavorsMade()}` function CoffeeFlavor(newFlavor) { Decorators in JQuery })( jQuery ); getAuthor() { js lets you extend HTML with HTML attributes called directives. // Create a race car driver that inherits from the person object "), We can thus extend the original example as follows. // Confirms that myBigTruck was created with the prototype Truck Going back to the jQuery library, most of us are aware that both getElementById("identifier") and $("#identifier") can be used to query an element on a page by its ID.Did you know however that getElementById() on its own is significantly faster by a high order of magnitude? } // reference and a normal reference publish( "inbox/newMessage", [{ // of the values expected. class MyWorkflow { }, }); Currently, they are also supported by all major browsers for both desktops and mobiles. Let us look at an implementation of the module pattern that uses the WeakMap object. define( "myModule", } Adding new attributes or methods to object instances of the class in JavaScript is a very straightforward process. This can mean an increased amount of work to perform lookups, however developers such as Juriy Zaytsev have previously tested and found the performance differences between single object namespacing vs the "nested" approach to be quite negligible. // and myApplication gets set to {} correctly For starters, it's a lot cleaner for developers coming from an object-oriented background than the idea of true encapsulation, at least from a JavaScript perspective.Secondly, it supports private data - so, in the Module pattern, public parts of our code are able to touch the private parts, however the outside world is unable to touch the class's private parts (no laughing! _private.set(args.val); takeOrders('Frappe', 1); // the exported module properties. You can tell browsers to accept "script" tags that contain JavaScript modules by specifying the `type` attribute with a value of `module`: The `nomodule` attribute tells modern browsers not to load a classic script as a module. // otherwise, set new filter values // Pull in jQuery and Underscore ManyCam is a free live studio & webcam effects software. // console.log('jumping'); checkoutDate, } updateCounter( data ); }, var myAnimator = new CarAnimator(); Object.defineProperties( newObject, { const truck = abstractVehicleFactory.getVehicle('truck', { In modern applications, it is very common to have multiple view objects that need to communicate, but have no direct relationship. drive() { Pseudo-classical DecoratorsWe're now going to examine a variation of the Decorator first presented in a JavaScript form in Pro JavaScript Design Patterns (PJDP) by Dustin Diaz and Ross Harmes.Unlike some of the examples from earlier, Diaz and Harmes stick more closely to how decorators are implemented in other programming languages (such as Java or C++) using the concept of an "interface", which we will define in more detail shortly.Note: This particular variation of the Decorator pattern is provided for reference purposes. // The static keyword defines a static method for a class. getCoffeeFlavor(flavorName) { checkoutDate, // mylib/UpdatableObservable: a Decorator for dojo/store/Observable // set up additional objects that have additional events, which are used privateMethod2 = function () { /* */ }, Other modules in the system aren't directly aware of the concept of a facade and could be considered unidirectional. Please take a look at the contribution guidelines pages first. It exposes a constant object carManager, which is our command object responsible for issuing commands to request information about a car, buy a car, and arrange a viewing. This allows for all kinds of useful things such as being able to mock views in unit tests.The most common implementation of MVP is one which uses a Passive View (a view which is for all intents and purposes "dumb"), containing little to no logic. }); (function(){ In our world, a mediator is a behavioral design pattern that allows us to expose a unified interface through which the different parts of a system may communicate. } if ( elem.nodeType === 1 ) { Facades don't just have to be used on their own, however. } MacbookWith8GBRamAndParallels = function(){}, }; proxy = function() { }); For further information about the above wrapper, see http://requirejs.org/docs/api.html#cjsmodule. In the past, these patterns have been heavily used for structuring desktop and server-side applications but it's only been in recent years that come to being applied to JavaScript.As the majority of JavaScript developers currently using these patterns opt to utilize libraries such as Backbone.js for implementing an MVC/MV*-like structure, we will compare how modern solutions such as it differ in their interpretation of MVC compared to classical takes on these patterns.Let us first now cover the basics.MVCMVC is an architectural design pattern that encourages improved application organization through a separation of concerns. for (var i = 0; i < ordersMade; ++i) { console.log( driver.dateOfBirth ); counter = 0; 40. Placing a Mediator between modules can also cause a performance hit as they are always communicating indirectly. Download [ PDF] Incose Systems Engineering. moveDown: function(){ }; The most basic in our list of best live streaming setups. let mb = new MacBook(); Object.defineProperty( obj, key, config ); Arguably works better than some alternative solutions (e.g. defineProp( person, "hasBeard", false ); const basket = new WeakMap(); // private functions and properties The Decorator PatternDecorators are a structural design pattern that aims to promote code re-use. return 900.00; A simple plugin constructor for logic related to the initial creation and the assignment of the element to work with. var MyWorkflow = function(){ model: "Ford Escort", function extend( ns, ns_string ) { This pattern allows the syntax of our scripts to be more consistent. }. // Define a skeleton vehicle factory All workflow and business logic that needs to be kicked off is put directly into the object that triggers the events and the objects that handle the events. We then define a skeleton for creating new Observers. insurance( mb ); each section of an accordion), there's a good chance the behavior of each element that may be clicked is going to be quite similar and relative to similar classes nearby. 62. // Outputs: The corresponding jQuery core cssHook which makes the above possible can be seen below: return observable; // Create a new instance of carAnimator baz: true // The benefit this pattern offers is easy application of functional behaviour to multiple objects or namespaces and can come in useful when applying a set of base methods to be built on later (e.g. var btn1Handler = function ( button, event ) { While its quite important to be aware of design patterns, it can be equally important to understand anti-patterns. // Override with custom update behaviour i: 5, } return undefined; if (!this.topics[topic]) { let length = 0; // Confirms that myBigTruck was created with the prototype Truck require on the other hand is typically used to load code in a top-level JavaScript file or within a module should we wish to dynamically fetch dependencies. The abstract factory can be named abstractVehicleFactory. bookRecordDatabase[bookID].dueReturnDate = newReturnDate; // Test to make sure we now have access to the methods originaljQuery = jQuery, That's not to say don't apply any caching at all, just be mindful that this approach can assist. return p; // References to our DOM elements if ( Ext.Ext2 ) { console.log( "data last updated at: " + getCurrentTime() + " with " + data); // with the properties in object b. console.log( basketModule.basket ); // This also won't work as it only exists within the scope of our The DOM (Document Object Model) supports two approaches that allow objects to detect events - either top-down (event capture) or bottom-up (event bubbling). console.log( basket ); This variation of the pattern demonstrates how globals (e.g jQuery, Underscore) can be passed in as arguments to our module's anonymous function. Serving Coffee flavor ${flavor} to table number ${context.getTable()} A guardian is any adult person, association, or corporation appointed by the Probate Court to. // Storage for our vehicle types Once we start building Views that are no longer trivial, we may end up with a large number of elements and attributes whose bindings in markup can become difficult to manage. Managing models in groups allows us to write application logic based on notifications from the group should any model it contains be changed. // myNS now also contains library.foo, library.bar We should also now appreciate how JavaScript MVC frameworks may differ in their interpretation of the MVC pattern, which although quite open to variation, still shares some of the fundamental concepts the original pattern has to offer. } addCase() { Imagine having to define hundreds of different object constructors for say, a JavaScript game. When a model changes (e.g when it is updated), it will typically notify its observers (e.g views, a concept we will cover shortly) that a change has occurred so that they may react accordingly. The mediator extracts the workflow from the implementation details and creates a more natural abstraction at a higher-level, showing us at a much faster glance what that workflow is.

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