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event delegation in javascript

Event Delegation is basically a pattern to handle events efficiently. Instead of adding an event listener to each and every similar element, we can add an event listener to a parent element and call an event on a particular target using the .target property of the event object.
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Event Delegation Example In JavaScript

	selector = ".buttonClass";
document.getElementById('buttons').addEventListener('click', event => { // Step 2
      if (event.target.matches(selector)) {
        console.log('Click!');
      }
    })
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