Add a stopwatch to your Oracle APEX application

Would you like to add a simple stopwatch to a new or existing Oracle APEX application?

Please follow the steps below

Create a page item of type textfield e.g P11_TIMER and include below custom attributes style="text-align:center; font-size:xxx-large". In my case want the text to appear extra large
Add the below css in the inline section of the page, this will ensure no text shows after the text field.

CSS:
```
 .donotshow
 {
  display:none;
 }
```

Add the below HTML (got an idea from Codepen) into the "Post Text" box (in my case I want it to appear after the text field).

HTML:

 <html lang = "en">
     <body>
         &emsp;<div><span id="sampletime" class="donotshow">0</span></div>
         <div class="wrapper">
         <button id="startTimer" style="background-color:#4267B2; color: white; cursor: pointer;"  onclick="start();" type="button">Start</button>
         <button id="stopTimer" style="background-color:#FF7276; color: white; cursor: pointer;" onclick="stop();" type="button" >Stop</button>
         <button id="resetTimer"  onclick="resettozero();" style="cursor: pointer;" type="button">Reset</button>
         </div>
         <script>
             var timeElapsed = 0;
             var timerID = -1;
             function tick() {
                 timeElapsed++
                 const tminutes = Math.floor(timeElapsed / 60);
                 const tseconds = timeElapsed - tminutes * 60;
                 function str_pad_left(string, pad, length) {
                              return (new Array(length + 1).join(pad) + string).slice(-length);
                                }
                  const finalTime = str_pad_left(tminutes, '0', 2) + ':' + str_pad_left(tseconds, '0', 2);
                 document.getElementById("sampletime").innerHTML = finalTime;
                 apex.item( "P11_TIMER").setValue(document.getElementById("sampletime").innerHTML )
             }

             function start() {
                 if(timerID == -1){
                     timerID = setInterval(tick, 1000);
                 }
             }

             function stop() {
                 if(timerID != -1){
                     clearInterval(timerID)
                     timerID = -1
                 }
             }

             function resettozero() {
                 stop();
                 timeElapsed = -1;
                 tick()
             }
         </script>
     </body>
 </html>

Quite simple to implement. You might no longer need an actual stopwatch!

See it in action here: https://apex.oracle.com/pls/apex/f?p=100471

Enjoy.