Introduction to JavaScript and its industrial use cases.

JavaScript

What is JavaScript ?

Client-Side JavaScript

Advantages of JavaScript

  • Less server interaction − You can validate user input before sending the page off to the server. This saves server traffic, which means less load on your server.
  • Immediate feedback to the visitors − They don’t have to wait for a page reload to see if they have forgotten to enter something.
  • Increased interactivity − You can create interfaces that react when the user hovers over them with a mouse or activates them via the keyboard.
  • Richer interfaces − You can use JavaScript to include such items as drag-and-drop components and sliders to give a Rich Interface to your site visitors.

Netflix and node.JS

Netflix is now among companies using Node.JS due to the following reasons:

  • A common language both for the server-side and browser side.
  • High performance — now the page loads within seconds.
  • A great number of modules and their open-source nature.
  • An easy way of writing, debugging and engineering the API.

Beyond streaming

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