Example of React Native Timer and Stopwatch

This is an Example of React Native Timer and Stopwatch. To make a Stopwatch and Timer we have a very good library called react-native-stopwatch-timer. It will provides Stopwatch and Timer component.

React Native Timer and Stopwatch

A Stopwatch is a special watch which can be used to count the time. In stopwatch time starts from zero and run until we stop it but Timer is the exact opposite of it. In the Timer, we decide the time to count and it counts towards zero.

Stopwatch

Timer

In this example, we will make a Stopwatch and a Timer. The Timer will show the count down from the given Millisecond.  So Let’s get started.

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

npm install -g react-native-cli

Run the following commands to create a new React Native project

react-native init ProjectName

If you want to start a new project with a specific React Native version, you can use the --version argument:

react-native init ProjectName --version X.XX.X
react-native init ProjectName --version react-native@next

This will make a project structure with an index file named App.js in your project directory.

Installation of Dependency

To use Stopwatch and Timer you need to install react-native-stopwatch-timer package.

To install this open the terminal and jump into your project using

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-stopwatch-timer.

–save is optional, it is just to update the react-native-app-intro-slider dependancy in your package.json file.

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.
cd ProjectName
To run the project on an Android Virtual Device or on real debugging device
react-native run-android
or on the iOS Simulator by running
react-native run-ios (macOS only).

          

That was the React Native Timer and Stopwatch. 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. 🙂

4 thoughts on “Example of React Native Timer and Stopwatch”

    • You can see getFormattedTime method which is called when the stopwatch time changes.

      getFormattedTime(time) {
      this.currentTime = time;
      }

      You can make a global variable and define the value into it and whenever you want to know the current time you can access it from that variable.

  1. i have create the global variable and define the value into it. but it is not working and you make some code which will help.

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