V's UI framework is built directly into the core language, making it unusually tightly integrated compared to many other languages that require external libraries.
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SwiftUI uses a declarative syntax, meaning you describe *what* you want the UI to look like, not *how* to build it step-by-step. The framework handles the underlying implementation details.
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React, originally created by Facebook, was initially used internally for a newsfeed component before becoming the widely adopted framework it is today.
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