What are the differences between async and defer in JavaScript?
An example of an AI chatbot conversation about async and defer in JavaScript.
Can you explain the difference between async and defer in JavaScript?
Sure! Both async and defer are attributes for the script tag that control how scripts are loaded. The main difference is that async scripts are executed as soon as they are downloaded, while defer scripts are executed in order after the HTML document has been fully parsed.
When should I use async over defer?
You should use async when the script is independent and doesn't rely on other scripts or the DOM being fully loaded. Use defer when the script depends on the DOM being fully parsed or when you want to maintain the order of execution.
Can you give an example of when to use each?
Certainly! Use async for analytics scripts that can run independently, and use defer for scripts that manipulate the DOM, like a script that initializes a gallery after the page loads.
Use ChatGPT in Telegram
Get this answer and more from ChatGPT in Telegram, try it for free!
Get Started For FreeWhat can MagicBuddy do?
The Friendly AI in Your Pocket
Powered by advanced language models trained on billions of online words and conversations, MagicBuddy delivers friendly and helpful chat on demand.
Ask questions and get answers. Crack jokes and get laughs. Or even get writing ideas and study help. MagicBuddy's conversational intelligence allows for a truly unique and useful chat experience.
Curious? Try these prompts:
Telegram's Best AI-Powered Chatbot
MagicBuddy is incredibly easy to use and the responses are lightning fast! 🥇
Impressive! MagicBuddy is my go-to AI assistant. It’s quick, accurate, and user-friendly.
Sending voice messages makes it easier to use in the middle of the day and the answers are super fast.
Love it! A friend of mine told me about it and it has made my life so much easier. It’s like having a helpful friend in my pocket!
I use 2 months already, simply amazing! MagicBuddy delivers answers in a snap. It’s a must-have tool for staying informed!
Game-changer! MagicBuddy’s speed and accuracy are unmatched. It’s my secret weapon for productivity
Talk to ChatGPT on Telegram
Say Hello to Your New Telegram BFF - Try MagicBuddy Free!
Get Started For Free