← Back toFront-end Tips

Count how many times a function has been called

Written byPhuoc Nguyen
27 Sep, 2022
If you want to count how many times a function has been called, you probably think of a global variable:
let counter = 0;

const expensiveFunctionToDebug = () => {
console.log(`This function has been called: ${counter}`);

// Function body ...
We simply increase the counter by 1 and log the latest value whenever the `expensiveFunctionToDebug` function is invoked. `console` has a great method to do the same thing:
const expensiveFunctionToDebug = () => {

// Function body ...
In the Console tab of browsers, you will see something as following:
expensiveFunctionToDebug: 1
expensiveFunctionToDebug: 2
expensiveFunctionToDebug: 10
The `console.count` function prints the label you pass to it followed by the number of times the function is executed.

See also

Questions? 🙋

Do you have any questions? Not just about this specific post, but about any topic in front-end development that you'd like to learn more about? If so, feel free to send me a message on Twitter or send me an email. You can find them at the bottom of this page.
I have a long list of upcoming posts, but your questions or ideas for the next one will be my top priority. Let's learn together! Sharing knowledge is the best way to grow 🥷.

Recent posts ⚡

Newsletter 🔔

If you're into front-end technologies and you want to see more of the content I'm creating, then you might want to consider subscribing to my newsletter.
By subscribing, you'll be the first to know about new articles, products, and exclusive promotions.
Don't worry, I won't spam you. And if you ever change your mind, you can unsubscribe at any time.
Phước Nguyễn