How to Create a Countdown Timer Using ReactJS ?
Approach: We can use the following approach in React JS to use the Countdown timer.
- getTimeRemaining: This will compute the difference between the target timer and the current time we have. This function will check the time left from the target timer by doing calculations and return a total number of hours, minutes, and seconds.
- StartTimer: This function will start timing down from getting a total number of hours, minutes, and seconds from the getTimeRemaining function.
- ClearTimer: This function is used to reset the timer, which means If you restart the timer it clears the time remaining from the previous countdown, otherwise it starts parallel two-timing down or it may collapse each other.
- getDeadTimer: This function provides the deadline of the timer means it gives time from where you want to start the countdown. In this, you have to add time if you want to extend. We have used this in two scenarios first when the page is loaded and second when someone clicks the reset button.
Creating React Application And Installing Module:
Step 1: Create a React application using the following command:
npx create-react-app foldername
Step 2: After creating your project folder i.e. foldername, move to it using the following command:
Project Structure: It will look like the following.
Example: Now let’s see how to create a countdown timer in Reactjs. The code for App.js will look like the following.
Steps To Run Application: Run the application using the following command from the root directory of the project:
Output: Now open your browser and go to http://localhost:3000/, you will see the following output:
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