React Native CountDown Timer

A CountDown Timer is the reverse of the timer we usually see.  CountDown Timer can be used if you are making an App which has some time constraints like if you are making a quiz App, You need some sort of timer to show the remaining time.

To make a CountDown Timer we have a very good library react-native-countdown-component. It will provide a CountDown component which is very easy to integrate.  You can see the example below.

In our Example, we will make a CountDown Timer which will show the Count Down from the Expiry DateTime to the Current DateTime. If you want to make a simple quiz app using this you can directly pass the time for the CountDown Timer in seconds. We have used a library called moment which is very helpful if you are playing around the Date and Time.

To Make a React Native App

Getting started with React Native will help you to know more about the way you can make a React Native project. We are going to use react-native init to make our React Native App.

Assuming that you have node installed, you can use npm to install the react-native-cli command line utility.
Open the terminal and go to the workspace and run Run the following commands to create a new React Native project This will make a project structure with an index file named App.js in your project directory.

Installation of Dependencies

To use CountDown you need to install react-native-countdown-component package. To install this

Open the terminal and jump into your project

Run the following command

This command will copy all the dependencies into your node_module directory, You can find the directory in node_module directory named react-native-countdown-component.

To use moment you need to install moment. To install this

run the following command.

–save is optional, it is just to update the react-native-countdown-component and moment dependancies in your package.json file.

Dependency Version for this Example used is

Now Open App.js in any code editor and replace the code with the following code.

App.js

To Run the React Native App

Open the terminal again and jump into your project using. To run the project on an Android Virtual Device or on real debugging device or on the iOS Simulator by running

Android

IOS

 

That was the React Native Count Down Timer. If you have any doubt or you want to share something about the topic you can comment below or contact us here. There will be more posts coming soon. Stay tuned!

Hope you liked it. 🙂

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About Snehal Agrawal

#SelfLearner #MobileAppDeveloper #TechnologyMiner #OpenSourceLover thats enough to describe me..

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2 Comments on “React Native CountDown Timer”

    1. Hey hi Tarik, Thank you for the appreciation. CountDown used in this example is an imported component form the react-native-countdown-component library. Do you want to add : in between or want to show the time?

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