When is vanilla JavaScript better than React?
For very simple, static, or single-element interactions, vanilla JavaScript is simpler and has no dependency overhead. React becomes worth it once your UI has state, reused components, and dynamic updates.
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More FAQs in React Hello World vs Vanilla JavaScript Hello World: What's Different?
Hello World is the worst case for React. React's value appears as UI complexity grows. For a single static message, vanilla JavaScript is simpler, but for interactive, stateful apps, vanilla DOM manipulation becomes unmanageable.
Vanilla JavaScript makes you manually update DOM elements. React makes you describe the UI based on state, and React handles the DOM updates. It is a shift from 'how do I update this' to 'what should the UI look like given this state.'
Not for simple examples. React has overhead from its rendering model. Its advantage is not raw speed for tiny tasks; it is manageability and consistency as an application grows complex and interactive.
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