# Lazyload resources It’s possible that the assets that are within the context of your web page are not even visible to the user. It's therefore wasteful to load these resources. A technique is to add a lazy loading flag to images, videos, or iframes that are `below the fold`. They are only loaded when they enter the browser's viewport. We can further expand this technique by loading assets based on user interaction. For example, if the video is visible but the user hasn't chosen to play it, there's no need to load its resources. By using `onclick` events, we can load only what’s needed when the user clicks the play button. This approach can also be applied to implementations like chatbots or external maps. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.umbraco.com/sustainability-best-practices/frontend/lazy-load-resources.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.