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browser

Vincent White Juni 2, 2016
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A web browser is a software application for retrieving, presenting, and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI/URL) and may be a web page, image, video or other piece of content. Hyperlinks present in resources enable users easily to navigate their browsers to related resources.

Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser.

Most major web browsers have these user interface elements in common:

  • Back and forward buttons to go back to the previous resource and forward respectively.

  • A refresh or reload button to reload the current resource.

  • A stop button to cancel loading the resource. In some browsers, the stop button is merged with the reload button.

  • A home button to return to the user’s home page.

  • An address bar to input the Uniform Resource Identifier (URI) of the desired resource and display it.

  • A search bar to input terms into a search engine. In some browsers, the search bar is merged with the address bar.

  • A status bar to display progress in loading the resource and also the URI of links when the cursor hovers over them, and page zooming capability.

  • The viewport, the visible area of the webpage within the browser window.

  • The ability to view the HTML source for a page.

The major web browsers are Firefox, Internet Explorer/Microsoft Edge, Google Chrome, Opera, and Safari.

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