Timers (setTimeout & setInterval)
Control time in JavaScript! Learn to schedule code execution with setTimeout and setInterval.
Control time in JavaScript! Learn to schedule code execution with setTimeout and setInterval. This hands-on tutorial focuses on practical implementation of timers (settimeout & setinterval) concepts.
Timers (setTimeout & setInterval)
JavaScript isn't just about "now." Sometimes you want code to run later (after a delay) or repeatedly (every few seconds).
1. setTimeout (Run Once) ⏱️
Executes a function once after a specified delay.
Syntax: setTimeout(function, delayInMilliseconds)
Canceling a Timeout
If you change your mind, you can stop it using clearTimeout.
2. setInterval (Run Repeatedly) 🔄
Executes a function over and over at a specified interval.
Syntax: setInterval(function, intervalInMilliseconds)
3. The "Zero Delay" Trick 🌀
What happens if you set the delay to 0?
Practical Example: Countdown ⏳
AI Mentor
Confused about "JavaScript timers, setTimeout, setInterval, and the event loop"? Ask our AI mentor for a simplified explanation.
Quiz
Quiz
Question 1 of 4Which function runs code repeatedly?
Key Takeaways
✅ setTimeout = Run once.
✅ setInterval = Run loop.
✅ clearTimeout / clearInterval = Stop.
✅ Asynchronous: Timers don't block code execution.
What's Next?
Timers are cool, but fetching data from the internet is cooler. Let's learn the Fetch API!
Keep coding! 🚀