BirthYear App

This sample application is a reprint of an article first featured on Think I­T on the 12/26/2012.

The app will calculate a user’s birthyear and display it after he/she entered his/her name and age.

Tested Environment

  • Android 4.2.2
  • iOS 7.1.1

File Components

File Description
index.html The startup Page
css/style.css The stylesheet used in the application

Required JS/CSS Components

  • jQuery

HTML Explanation

The following contents of the HTML body of index.html file is for displaying 2 textboxes for the user to input his/her name and age, and a button to calculate his/her birthyear. (see screenshot below):

  <div data-role="page" id="TopPage">
      <header data-role="header" data-position="fixed">
          <h1>BirthYear App</h1>
      <section data-role="content">

          What's your name?
          <input type="text" id="myname" class="input-text" style="width: 40%">

          How old are you?
          <input type="text" id="myage" class="input-text" style="width: 20%">

          <a class="button" onclick="calculate();">calculate your birth year!</a>

JavaScript Explanation

This code creates a function called calculate.

After entering your age and name, it stores them in two variables called myname and myage respectively. It then goes on to calculate your birth year based on today’s date, and stores it in a variable called birthyear.

Finally it stores the message contents in a variable called text, calls the navigator.notification.alert function and displays the result as a popup.

The navigator.notification.alert function is a Core Cordova Plugins function that displays a popup dialog box on the screen. The third argument displays the text Welcome to Monaca! as the title of the dialog box.