Lifecycle Controls
Component Data

No component mounted yet

Lifecycle Flow
1. Component created
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2. mounted() callback fires
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3. Component is active
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4. changed() callback fires on attribute updates
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5. Component removed
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6. unmounted() callback fires
Lifecycle Hooks Explained
Hook When It Fires Use Cases
mounted() After component is added to DOM Initialize state, fetch data, set up timers
unmounted() When component is removed from DOM Cleanup: clear timers, remove listeners
changed(attr, old, new) When observed attribute changes React to prop changes, update UI