Differences Between $(document).ready() and $(window).load() in jQuery

The main difference between $(document).ready() and $(window).load() in jQuery is the timing of when they are executed.

$(document).ready(): This function is called when the HTML document has been completely loaded and parsed, but external resources like images may not have finished downloading. It is ideal for executing jQuery code that manipulates elements on the page or sets up event handlers.

$(window).load(): This function is triggered after the whole page, including all external resources such as images, has finished loading. It is typically used for situations where you need to ensure that all page elements, including images, are fully loaded before executing certain code.

When to Use Each One

$(document).ready(): Use this function when you want to run jQuery code as soon as the DOM is fully loaded, without waiting for all external resources to load. This is recommended for improving the speed and performance of your page as it allows the user to interact with the content sooner.

$(window).load(): Use this function when you need to wait for all external resources, such as images, to be completely loaded before executing specific code. This ensures that all elements on the page are ready before performing any actions that depend on them.

Overall, understanding the differences between $(document).ready() and $(window).load() in jQuery helps in determining the appropriate timing for executing JavaScript code based on the specific requirements of the webpage.

jQuery Interview Question: Differences between $(document).ready() and $(window).load()

In jQuery, $(document).ready() and $(window).load() are both used to execute code when the document has finished loading, but there are key differences between the two.

$(document).ready()

$(document).ready() is a jQuery method that allows you to execute code as soon as the DOM is ready, without waiting for the entire page to load. This means that it is triggered once the HTML structure is in place, but before all the external resources like images, iframes, and stylesheets have finished downloading.

It is recommended to use $(document).ready() for most jQuery code, as it ensures that the code will run as soon as possible without delaying the rendering of the page.

$(window).load()

$(window).load() is a jQuery method that waits for all the external resources on the page to load, including images, iframes, and stylesheets, before executing the code. This means it is triggered after the entire page, including external resources, has finished loading.

$(window).load() can be useful when you need to access the dimensions of images or other resources that are not available until they have fully loaded.

When to use each one?

Use $(document).ready() when you want to execute code as soon as the DOM is ready, and you don't need to wait for external resources to load. Use $(window).load() when you need to wait for all external resources to load before executing the code, such as when you need to manipulate elements that rely on these resources being fully loaded.