In this practice let's build a Digital Timer by applying the concepts we have learned till now.

Refer to image below:

Design Files

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• Extra Small (Size < 576px), Small (Size >= 576px)
• Medium (Size >= 768px), Large (Size >= 992px) and Extra Large (Size >= 1200px)

Project Set Up Instructions

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• Download dependencies by running npm install
• Start up the app using npm start

Project Completion Instructions

Click to view the Functionality to be added

Add Functionality

The app must have the following functionalities

• When the Start button is clicked
  • The Start text should change to Pause text
  • The play icon should be replaced by pause icon
  • The Timer status should change to Running
  • The Timer should start running backward from the timer limit value set
  • If the Timer has been paused after starting, it should resume from where it was paused
  • Both the Plus and Minus buttons should be disabled
• When the Pause button is clicked
  • The Pause text should change to Start text
  • The pause icon should be replaced by play icon
  • The Timer should stop running backward
  • The Timer status should change to Paused
  • Both the Plus and Minus buttons should be disabled
• When the button with Plus is clicked
  • The timer limit value should increase by 1 minute
  • The Timer should display time with the increased timer limit value
• When the button with Minus is clicked
  • The timer limit value should decrease by 1 minute
  • The Timer should display time with the decreased timer limit value
• When the timer limit value is modified by clicking Plus or Minus button then the clicking on Start button should start the Timer with modified value
• When the Timer ends (displays 00:00)
  • The Pause text should change to Start text
  • The pause icon should be replaced by play icon
  • The Timer should stop running backward
  • The Timer status should change to Paused
• After completion of Timer, when the Start button is clicked
  • The Start text should change to Pause text
  • The play icon should be replaced by pause icon
  • The Timer should start running backward from the current timer limit value.
  • The Timer status should change to Running
• When the Reset button is clicked then
  • The Pause text should change to Start text
  • The pause icon should be replaced by play icon
  • The Timer should stop running backward
  • The Timer status should change to Paused
  • Initial Timer limit value should be displayed
  • Both the Plus and Minus buttons should be enabled

Click to view the Implementation Files

• Your task is to complete the implementation of
  • src/components/DigitalTimer/index.js
  • src/components/DigitalTimer/index.css

Important Note

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The following HTML attributes are required for the HTML button and image elements for the tests to pass

• The HTML main heading element to display the time should have the testid attribute and its value as timer

Quick Tips

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• You can use the below box-shadow CSS property to apply box-shadow effect to the containers,

    box-shadow: 0px 8px 40px rgba(7, 7, 7, 0.08);
  
  

• The floor() method rounds a number DOWNWARDS to the nearest integer, and returns the result.

  console.log(Math.floor(5.95)); // output: 5
  

• You can use the background-position property to set the starting position of a background image.

  background-position: center;
  

Resources

Image URLs

Images

• https://assets.ccbp.in/frontend/react-js/digital-timer-elapsed-bg.png
• https://assets.ccbp.in/frontend/react-js/play-icon-img.png alt text should be play icon
• https://assets.ccbp.in/frontend/react-js/pause-icon-img.png alt text should be pause icon
• https://assets.ccbp.in/frontend/react-js/reset-icon-img.png alt text should be reset icon

Colors

Colors

Hex: #ffffff

Hex: #cffcf1

Hex: #1e293b

Hex: #0f172a

Hex: #defafe

Hex: #00d9f5

Font-families

• Roboto

Things to Keep in Mind

• All components you implement should go in the src/components directory.
• Don't change the component folder names as those are the files being imported into the tests.
• Do not remove the pre-filled code
• Want to quickly review some of the concepts you’ve been learning? Take a look at the Cheat Sheets.