How can I toggle multiple classes on different elements based on user interaction with performance optimization in a jQuery-heavy UI

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How can I toggle multiple classes on different elements based on user interaction, with performance optimization in a jQuery-heavy UI?

I’m working on a jQuery-heavy UI where user interactions (like clicks or hovers) need to toggle multiple classes on different elements. With a lot of interactions happening, I’m worried about performance. What’s the best way to handle this efficiently?

Nov 19 in Web Development by Nidhi
• 3,520 points
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1 answer to this question.

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Toggling multiple classes on different elements in a jQuery-heavy UI while ensuring performance optimization can be done by following these strategies:

1. Event Delegation: Use event delegation to reduce the number of event listeners. Attach events to a common ancestor of the elements you want to target, which can efficiently handle many elements.

2. Efficient Selectors: Use efficient jQuery selectors to avoid unnecessary DOM traversals. Cache selectors if they are used multiple times.

3. Batch DOM Manipulations: Group DOM read/write operations together to minimize layout thrashing. Try to minimize the number of reflows and repaints.

4. Use `.toggleClass()`: Utilize jQuery’s `.toggleClass()` method to efficiently toggle classes.

5. Minimize jQuery Usage: Where possible, use native JavaScript methods for better performance with modern browsers.

Let's take an example:

$(document).ready(function() {

  // Cache selectors to improve performance

  let $elements = $('.toggle-elements');

  // Event delegation for click events

  $('#container').on('click', '.toggle-button', function() {

    // Toggle multiple classes on target elements

    $elements.toggleClass('active inactive');

  });

});

Explanation:

Event Delegation: Here, an event listener is attached to `#container`, the common ancestor, instead of each individual `.toggle-button`, enhancing performance, especially when the UI has many buttons.

Efficient Selectors and Caching: The `$('.toggle-elements')` selector is cached so that it doesn’t repeatedly search the DOM every time the event is triggered.

Toggle with `.toggleClass()`: Use `.toggleClass('className')` to add or remove classes without recalculating styles multiple times.

By following these methods, you can optimize interactions in a jQuery-heavy UI to ensure better performance, especially when dealing with large sets of elements.

answered Nov 19 by kavya

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