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JS addEventListener()

This example uses the addEventListener() method to add many events on the same button.

Try it

var x = document.getElementById("myBtn");
x.addEventListener("mouseover", myFunction);
x.addEventListener("click", mySecondFunction);
x.addEventListener("mouseout", myThirdFunction);

function myFunction() {
  document.getElementById("demo").innerHTML += "Moused over!
";
}

function mySecondFunction() {
  document.getElementById("demo").innerHTML += "Clicked!
";
}

function myThirdFunction() {
  document.getElementById("demo").innerHTML += "Moused out!
";
}