How to use setInterval() function in JavaScript?

The setInterval function in JavaScript allows you to execute a function repeatedly, with a fixed time delay between each call.

The syntax for setInterval is as follows:

setInterval(function(){
  // code to be executed
}, intervalInMilliseconds);

Where function is the code you want to execute repeatedly, and intervalInMilliseconds is the number of milliseconds to wait between each execution.

Example usage:

let counter = 0;

console.log("Starting setInterval");

let intervalId = setInterval(function(){
  counter++;
  console.log("Executing setInterval function: " + counter);
  
  if (counter >= 5) {
    clearInterval(intervalId);
  }
}, 1000);

console.log("After setInterval");

This will log “Starting setInterval”, execute the setInterval function every 1 second (1000 milliseconds), log the value of counter each time it’s executed, until counter is greater than or equal to 5, at which point the interval will be cleared using clearInterval. Finally, it will log “After setInterval”.