type of timer

One. Timer setTimeout, setInterval

(1) setTimeout

 setTimeout(() => {console.log('It's time to execute me');}, timeout);

This timer will only run once

Code:

 setTimeout(() => {console.log('It's time to execute me');}, 2000);

You can see the content inside after 2s hit.

Please continue reading

(2) setInterval

 setInterval(() => {console.log('It's time to execute me');}, interval);

Code:

 setInterval(() => {console.log('It's time to execute me');}, 2000);

It will be executed every 2s.

2. Clear timer clearTimeout

(1) clearTimeout(timer name)

 let timer = setTimeout(() => {console.log('It's time to execute me');}, 2000);clearTimeout(timer)

As you can see, nothing is printed in the console.

(2)clearInterval(timer name)

let timer1 = setInterval(() => {console.log('It's time to execute me');}, 2000);setTimeout(() => {clearInterval(timer1)}, 6000);

What you can see is that it is executed three times, it is no longer executed, and it has been cleared at this time.

To clear a timer, first give it a name.and finally clear it.