Why is Dart language so popular?

Primarily, the clean, intuitive, concise and simple syntax makes the Dart language very productive. Also, the built-in support for strong type checking makes it a very suitable language for large projects with a big team of developers. Dart also has a large collection of libraries and frameworks packed with it.

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Is flutter JavaScript based?

No, Flutter uses Dart compiled to native binary code . There is no JavaScript involved at all. You can run JavaScript in a WebView plugin if you want. Skia is an open source 2D graphics library which provides common APIs that work across a variety of hardware and software platforms.

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