statistical – the server part creates a page in response to a request and sends it to the browser regardless of the user’s actions, so that different users will see the same material on the same request;
dynamic – the server part generates a page in response to the request, only the material passes through the application server beforehand and is generated depending on what commands have been sent.

Regardless of whether there is a web application for e-commerce, communication, content creation or other purposes, this kind of application works on a client-server principle. That is why the following components are distinguished in the structure:

client part – responsible for the actions performed by the user;
The server part – is responsible for processes occurring on the server;
Database – the structure for the orderly storage of information and access to it.

Depending on what tasks are set by the creators of the project, they use these or those means of web applications development. The main task – to provide functional interaction between the client and server parts, access to the database, the correct possibilities of forming and sending pages in response to requests.

Based on the tasks set, developers can create a web application, to which it will be possible to access from any device, or demanding development environment to work with which only devices with a certain level of hardware capabilities will do. Different methods can be used to develop web applications, including open access to the architecture, as with Wikipedia, or no access for outsiders, as with any commercial or news application.

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In a web application, the client will interact with the web server through auxiliary utilities. These are called browsers. The logic is shared between the server and the client. The storage of information is done mainly on the server. Data exchange is provided by the Web.

The main advantage of this kind of content is that clients will not depend on one or another operating system. It does not matter what OS is installed on the involved device. Web-applications will work everywhere. This is a cross-platform option.

Technical features
Web applications have a number of features that make related content convenient and productive. The following points are important to keep in mind:

• Functions are performed independently of the user’s OS.
• The application will be created only once for an arbitrarily chosen platform. It is on it that further deployment is done.
• Sometimes the user rights to edit the settings of the Internet browser can cause a lot of trouble. Applications to work with the network will not be displayed correctly.
• Problems in the development and support of utilities due to different CSS and DOM implementations are not excluded.
• It is possible to use Java applets and Adobe Flash. With the second type of applications today have difficulties. This is due to the fact that Flash technology is no longer supported since 2015.
• In a sense, web applications can be classified as “thick” clients. This is due to the peculiarities of the architecture of the content in question.

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