jQuery Performance Optimization
35 minjQuery performance can be optimized by caching selectors, using efficient selectors, and minimizing DOM queries.
Event delegation using .on() is more efficient than binding events to individual elements.
Understanding jQuery's internal workings helps write more efficient code.
Exercise
Optimize jQuery code by caching selectors and using event delegation.
$(document).ready(function() {
// Cache selectors for better performance
var $container = $('#container');
var $button = $('#myButton');
// Use event delegation for dynamically added elements
$container.on('click', '.dynamic-item', function() {
$(this).toggleClass('active');
});
// Efficient selector usage
$button.click(function() {
$container.find('.item').each(function() {
// Process each item
});
});
});