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When it runs, it creates a global object called Modernizr that contains a set of Boolean properties for each feature it can detect. For example, if a browser supports the canvas API, the Modernizr.canvas property will be true. If the browser does not support the canvas API, the Modernizr.canvas property will be false:
In the listing shown in the example, which uses CSS to set the canvas element's size, the size of the element is 600 pixels wide and 300 pixels high, but the size of the drawing surface remains unchanged at the default value of 300 pixels × 150 pixels. When a canvas element's size does not match the size of its drawing surface, the browser ...
It uses the HTML5 canvas element and is accessed using Document Object Model (DOM) interfaces. WebGL 2.0 is based on OpenGL ES 3.0. It guarantees the availability of many optional extensions of WebGL 1.0, and exposes new APIs. [7] Automatic memory management is provided implicitly by JavaScript. [4]
Dynamic styles are a key feature of DHTML. By using CSS, one can quickly change the appearance and formatting of elements in a document without adding or removing elements. This helps keep documents small and the scripts that manipulate the document fast. The object model provides programmatic access to styles.
The messages that flow between computers to request services in a client-server environment can be designed as the linearizations of objects defined by class objects known to both the client and the server. For example, a simple linearized object would consist of a length field, a code point identifying the class, and a data value.
Ext JS has its own class system. [8] [9] Classes are defined with Ext.define and then an instance can be created with Ext.create. Some classes (e.g. components and stores) can have aliases and can be created by an alias. Instances of components are created automatically when the parent component is created.
The decoration features (e.g., methods, properties, or other members) are usually defined by an interface, mixin (a.k.a. trait) or class inheritance which is shared by the decorators and the decorated object. In the previous example, the class Component is inherited by both the ConcreteComponent and the subclasses that descend from Decorator.
In the example above, we can see the Image has a property named source, which has been assigned the value pics/logo.png. The property and its value are separated by a colon. The id property. Each object can be given a special unique property called an id. Assigning an id enables the object to be referred to by other objects and scripts.