In web development, when a browser loads a web page, it processes the HTML and creates a Document Object Model (DOM) representation of the page’s structure. This DOM includes all the elements on the page, their properties, and their relationships to each other.
JavaScript can interact with the DOM to add interactivity and dynamic behavior to web pages. However, JavaScript code can be executed before the entire DOM is fully loaded, leading to unexpected behavior or errors. To avoid this, it’s important to ensure that JavaScript code is executed only after the DOM is completely ready.
The $(document).ready() function in jQuery provides a way to ensure that your JavaScript code is executed only after the entire DOM has been loaded and is ready for manipulation. When you wrap your code inside $(document).ready(), it won’t start executing until the browser has finished parsing and constructing the entire DOM tree.