How To Call A Function Every Second In Javascript

What is setInterval function

You can use setInterval() function to call a function in JavaScript every second.

setInterval() is a JavaScript method that allows you to repeatedly call a function at a specified time interval (in milliseconds).

The setInterval() method takes two arguments: the first is the function you want to be executed repeatedly, and the second is the interval of time (in milliseconds) between each call.

Here’s an example:

function sayHello() {
  console.log('Hello, univers javascript');
}

setInterval(sayHello, 1000);

Explanation:

• setInterval() function in JavaScript is a method that allows us to execute a specified function repeatedly at a fixed interval of time. In other words, it allows us to call a function every second, minute, or desired interval.

• To use setInterval(), we first need to create a function that we want to be executed repeatedly. Then, we call the setInterval() function, passing in the function we created as the first argument, followed by the interval of time in milliseconds as the second argument.

• In this example, we first create a function named sayHello() that simply logs the “Hello!” string to the console. Then, we call the setInterval() function, passing in sayHello as the first argument and 1000 as the second argument. This tells setInterval() to call the sayHello() function every 1000 milliseconds, equivalent to 1 second.

• It’s important to note that the setInterval() function will continue to call the function repeatedly until clearInterval() is called, or the page is closed. If you want to stop the repeating calls, you can use the clearInterval() function, passing in the return value of setInterval() as the argument.

• In conclusion, setInterval() is a helpful function in JavaScript that allows us to repeatedly call a function at a set time interval. Whether you want to call a function every second, every minute, or any desired interval, setInterval() provides an easy and flexible way to achieve that.

Conclusion

Function setInterval() is a powerful tool in JavaScript that enables developers to execute a specified function repeatedly at a fixed interval. It’s useful for implementing various timed events or animations in web applications. By passing in a function as the first argument and an interval in milliseconds as the second argument, developers can quickly call a function every second, every minute, or any desired interval of time. Additionally, setInterval() can be stopped at any time by calling clearInterval() and passing in the return value of setInterval() as the argument. With its ease of use and flexibility, setInterval() is an essential tool for any JavaScript developer to have in their toolkit.