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What is the difference between HTML and React event handling?

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In HTML, the event name should be in lowercase and you can return false to prevent default behavior

And in React it follows camelCase convention and you must call preventDefault() explicitly

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Below are some of the main differences between HTML and React event handling,

In HTML, the event name should be in lowercase:

<button onclick='activateLasers()'>

Whereas in React it follows camelCase convention:

<button onClick={activateLasers}>

In HTML, you can return false to prevent default behavior:

<a href='#' onclick='console.log("The link was clicked."); return false;' />

Whereas in React you must call preventDefault() explicitly:

function handleClick(event) {

  event.preventDefault()

  console.log('The link was clicked.')

}

In HTML, you need to invoke the function by appending () Whereas in react you should not append () with the function name. (refer "activateLasers" function in the first point for example)
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