Frontend Mentor - Age Calculator App

Welcome! 👋

Frontend Mentor - Age Calculator App Solution

This is a solution to the Age Calculator App Challenge on Frontend Mentor. Frontend Mentor challenges help you improve your coding skills by building realistic projects.

Table of contents

• Overview
  • The challenge
  • Screenshot
  • Links
• My process
  • Built with
  • What I learned
  • Useful resources
• Author

Overview

The challenge

Users should be able to:

• View an age in years, months, and days after submitting a valid date through the form
• Receive validation errors if:
  • Any field is empty when the form is submitted
  • The day number is not between 1-31
  • The month number is not between 1-12
  • The year is in the future
  • The date is invalid e.g. 31/04/1991 (there are 30 days in April)
• View the optimal layout for the interface depending on their device's screen size
• See hover and focus states for all interactive elements on the page
• Bonus: See the age numbers animate to their final number when the form is submitted

Screenshot

Mobile Preview

Desktop Preview

Empty Form Preview

Invalid Form Preview

Active State Preview

Links

• Solution URL: https://github.com/DwarakanathAkkala/AgeCalculatorApp
• Live Site URL: https://age-calculator-front-end-mentor.netlify.app/

My process

Built with

• Semantic HTML5 markup
• CSS custom properties
• Flexbox
• CSS Grid
• Mobile-first workflow

What I learned

<!-- Do not autofill the number input using "autocomplete" attribute -->

<input
  autocomplete="off"
  type="number"
  class="poppins-bold"
  id="day"
  name="day"
  placeholder="DD"
/>

/* Targeting the input elements with a specific keyword used in "class" attribute */

input[class~="error"] {
  border-color: var(--light-red);
  outline: none;
}

// Animate the age numbers to their final number when the form is submitted

function animateResult(result, value, animateInterval) {
  clearInterval(animateInterval);

  let count = 0;

  let idInterval = setInterval(function () {
    let output = document.getElementById(result);
    output.innerText = count;
    count++;
    if (count > value) {
      clearInterval(idInterval);
    }
  }, 40);
}

Useful resources

• Stack Overflow (https://stackoverflow.com/) - This helped me for manipulating DOM by targeting HTML elements using JS with optimised code.

Author

• Website - Dwarakanath
• Frontend Mentor - @DwarakanathAkkala
• Instagram - @dwarakanath_akkala