What is the difference between document load event and document DOMContentLoaded event?

The document load event and the document DOMContentLoaded event are both events that signify different stages in the process of loading a webpage, but they are triggered at different times and are used for different purposes.

document DOMContentLoaded Event:

The DOMContentLoaded event is fired when the initial HTML document has been completely loaded and parsed, without waiting for stylesheets, images, and subframes to finish loading. This means that as soon as the HTML is fully parsed and the Document Object Model (DOM) tree is built, the DOMContentLoaded event is triggered. This event is useful for running scripts that don't require any styles or images to be loaded, allowing for quicker interactions with the DOM. For instance, you might use this event to add event listeners or initialize the user interface of a web application[1][2][3][4][5][10][11][13][15].

document load Event:

The load event, on the other hand, is fired when the entire page has loaded, including all dependent resources such as stylesheets, scripts, iframes, and images. This event is useful when you need to execute code that depends on external resources or when you need to know the exact layout of the page, which might depend on the loading of stylesheets and images. For example, if you need to know the dimensions of an image or if you are performing operations that require the final computed styles of elements, you would use the load event[1][2][3][4][5][7].

In summary, the DOMContentLoaded event occurs much earlier than the load event and is the best choice for scripts that need to run as soon as the HTML is parsed. The load event ...