JAVASCRIPT

onclick change text color javascript

<script>

    document.getElementById('change').onclick = changeColor;   

    function changeColor() {
        document.body.style.color = "purple";
        return false;
    }   

</script>

javascript change color of button

document.getElementById("button").style.background='#000000';

change the button color on click

button:active{
  background-color:green;
}

javascript-change color onclick()

const btn = document.querySelector('button');

function random(number) {
  return Math.floor(Math.random() * (number+1));
}

btn.onclick = function() {
  const rndCol = 'rgb(' + random(255) + ',' + random(255) + ',' + random(255) + ')';
  document.body.style.backgroundColor = rndCol;
}

to change color on button click

function btnRed() {
  document.getElementById("Div1").style.backgroundColor="Red";
}
function btnGreen() {
  document.getElementById("Div2").style.backgroundColor="Green";
}
function btnBlue() {
  document.getElementById("Div3").style.backgroundColor="Blue";
}
function btnReset() {
  document.getElementById("Div1").style.backgroundColor="Black";
  document.getElementById("Div2").style.backgroundColor="white";
  document.getElementById("Div3").style.backgroundColor="white";
}

change-button-color-onclick

const btn = document.getElementById('btn');

let index = 0;

const colors = ['salmon', 'green', 'blue', 'purple'];

btn.addEventListener('click', function onClick() {
  btn.style.backgroundColor = colors[index];
  btn.style.color = 'white';

  index = index >= colors.length - 1 ? 0 : index + 1;
});