let test = document.getElementById("test");
test.addEventListener("mouseover", function( event ) {
alert("mouse over test!")
, false);document.getElementById("myBtn").addEventListener("click", function() {
alert("Hello World!");
});var element = document.getElementById("#id");
element.addEventListener('click', function(){
console.log("click");
});const element = document.querySelector(".class__name");
element.addEventListener("click", () => {
console.log("clicked element");
});var element=document.getElementById("some_id");
var listener=element.addEventListener('click',function(event){
}); let element = document.getElementById(".class");
element.addEventListener('click', function(){
console.log("click");
});