Even/Odd JS

even-odd-js.markdown

Even/Odd JS

A Pen by Charles on CodePen.

License.

index.html

<div id="numbr"></div>
<div id="evenodd"></div>

script.js

function is_even( num ) {
  return new Promise( function( resolve, reject ) {
    if ( 0 === num % 2 ) {
      resolve( num );
    } else {
      reject( num );
    }
  } );
}

function rand_number( min, max ) {
  return Math.round( min + Math.random() * ( max - min ) );
}
let numbr = rand_number( 10, 12 );
document.getElementById('numbr').innerText = numbr;

is_even( numbr ).then(
  function( response ) {
    document.getElementById('evenodd').innerText = "Success! " + response + " is even, Steven";
  },
  function( error ) {
    document.getElementById('evenodd').innerText = "Failed! " + error + " is an Oddball";
  }
);