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What are the major components of a web browser? Draw a neat diagram to explain them.

Mumbai University > information technology > sem 4> Web Programming

Marks: 10M

Year : Dec16

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Browser's Components :

The browser's main components are :

1. The user interface:

This includes the address bar, back/forward button, bookmarking menu, etc. Every part of the browser display except the window where you see the requested page.

2. The browser engine: marshals actions between the UI and the rendering engine.

3. The rendering engine :

responsible for displaying requested content. For example if the requested content is HTML, the rendering engine parses HTML and CSS, and displays the parsed content on the screen.

4. Networking:

For network calls such as HTTP requests, using different implementations for different platform behind a platform-independent interface.

5. UI backend:

Used for drawing basic widgets like combo boxes and windows. This backend exposes a generic interface that is not platform specific. Underneath it uses operating system user interface methods.

6. JavaScript interpreter.

Used to parse and execute JavaScript code.

7. Data storage.

This is a persistence layer. The browser may need to save all sorts of data locally, such as cookies. Browsers also support storage mechanisms such as localStorage, IndexedDB, WebSQL and FileSystem.

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It is important to note that browsers such as Chrome run multiple instances of the rendering engine: one for each tab. Each tab runs in a separate process.

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