What are the best practices for async loading in web development?
The best practices for async loading include using the async
and defer
attributes in your script tags, optimizing resource loading, and prioritizing critical content.
Can you explain the difference between async and defer?
Sure! The async
attribute allows the script to be downloaded in parallel with the page, but it executes as soon as it's downloaded. The defer
attribute also downloads the script in parallel, but it waits to execute until the HTML document is fully parsed.
How can I optimize resource loading further?
You can optimize resource loading by minimizing the number of requests, using a content delivery network (CDN), and compressing files to reduce their size.
Are there any tools to help with async loading?
Yes, tools like WebPageTest and Lighthouse can help analyze your page's loading performance and suggest improvements for async loading.
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