React interview questions in Hindi #26 What are Synthetic events in React
0What are Synthetic events in React
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Synthetic events in React are a wrapper around the native browser events, designed to provide a consistent and cross-browser way to handle events in React components. React's synthetic event system normalizes event handling across different browsers and provides additional features to make event handling more efficient and manageable.
Here are some key characteristics and benefits of React's synthetic events:
Cross-browser Consistency: React's synthetic events ensure that event handling works consistently across various browsers. It abstracts the differences between browsers' native event implementations, so you don't have to worry about browser-specific quirks and inconsistencies.
Event Pooling: React uses a technique called event pooling to optimize memory usage and improve performance. Instead of creating a new event object for each event, React reuses a single event object and populates it with relevant data. This can reduce memory consumption and prevent unnecessary garbage collection.
Asynchronous Behavior: React's event system works asynchronously. This means that when an event handler is called, React might batch multiple event updates together and apply them in a single update cycle. This batching can improve performance by reducing the number of DOM updates.
Synthetic Event Properties: The synthetic event object that's passed to event handlers contains properties similar to native browser event objects, such as event.target, event.currentTarget, event.preventDefault(), etc. This allows you to access information about the event and its target elements in a familiar way.
Event Delegation: React's synthetic event system facilitates event delegation, where you can attach a single event listener to a higher-level element (like a container) and capture events from its child elements. This can be more efficient than attaching individual event listeners to each child element.
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