/*

​

  Allows the status of the caps lock key to be determined

​

*/

​

​

const capsElement = document.querySelector("#caps-led");

​

​

// Add the event listener to the document.

document.addEventListener("keypress",

                          (e)=> {

  let result = isCapslock(e);

  console.log(`caps ${result}`);

  let className = result ? 'on' : 'off';

  capsElement.classList.toggle("on", result);

});

​

function isCapslock(e){

    const IS_MAC = /Mac/.test(navigator.platform);

​

    const charCode      = e.charCode;

    const shiftKey      = e.shiftKey;

    if (charCode >= 97 && charCode <= 122){

      capsLock = shiftKey;

    } else if (charCode >= 65 && charCode <= 90 

               && !(shiftKey && IS_MAC)){

      capsLock = !shiftKey;

    }

​

    return capsLock;

​

}