Change Header colour on page refresh

Site URL: https://commercial.jrbullock.com/

Greetings,

I am trying to have a different header colour each time the page loads. I have patched this code together from a few sources.

I am using an array for the colours. I think I am close to a solution but I have run out of knowledge.

<script type="text/javascript">
//colour change on refresh
var colorArray = ["#003D44", "#096570", "#164487", "#FFFF99", "#2252A0", "#72220D"];
const headerr = document.querySelector('.header-announcment-bar-wrapper')
function getRandomColor() {
  return colorArray[Math.random() * colorArray.length | 0];
}

console.log(getRandomColor());

window.addEventListener('load', ()=> {
    headerr.style.backgroundColor * getRandomColour
});
</script>

Any help would be greatly appreciated.

4 hours ago, Nomuarch said:

Site URL: https://commercial.jrbullock.com/

Greetings,

I am trying to have a different header colour each time the page loads. I have patched this code together from a few sources.

I am using an array for the colours. I think I am close to a solution but I have run out of knowledge.

<script type="text/javascript">
//colour change on refresh
var colorArray = ["#003D44", "#096570", "#164487", "#FFFF99", "#2252A0", "#72220D"];
const headerr = document.querySelector('.header-announcment-bar-wrapper')
function getRandomColor() {
  return colorArray[Math.random() * colorArray.length | 0];
}

console.log(getRandomColor());

window.addEventListener('load', ()=> {
    headerr.style.backgroundColor * getRandomColour
});
</script>

Any help would be greatly appreciated.

Try 

<script>
  (function() {
    window.addEventListener('DOMContentLoaded', () => {
      const colorArray = ["#003D44", "#096570", "#164487", "#FFFF99", "#2252A0", "#72220D"];
      const headerr = document.querySelector('.header-announcement-bar-wrapper');
      if(headerr) {
        const colorRandom = Math.floor(Math.random() * colorArray.length);
        console.log(colorArray[colorRandom]);
        headerr.style.backgroundColor = colorArray[colorRandom];
      }
    });
  })()
</script>

Let me know how it works

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I have used this answer provided from a different site:

<script type="text/javascript">
  // Randomly set background color of Announcement Bar Wrapper.
  const headerABW = document.querySelector('.header-announcement-bar-wrapper');
  const colorArray = ["#003D44", "#096570", "#164487", "#FFFF99", "#2252A0", "#72220D"];
  headerABW.style.backgroundColor = colorArray[Math.floor(Math.random() * colorArray.length)];
</script>

Thanks to all who have answered here.