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About Node.js

Node.js is an open-source, cross-platform, back-end JavaScript runtime environment that runs on the V8 engine and executes JavaScript code outside a web browser. Node.js lets developers use JavaScript to write command line tools and for server-side scripting—running scripts server-side to produce dynamic web page content before the page is sent to the user's web browser.

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In many web applications assets like JavaScript and CSS files are often managed by NPM, the default package manger of Node.js, which makes Node.js a requirement.