JAVASCRIPT

button click javascript

document.getElementById('button').onclick = function() {
   alert("button was clicked");
}​;​

js click element

document.querySelector("span.testClass#testID").click()

click button javascript

// Create variable for what you are trying to click
let button = document.querySelector("#IDofItem");

// Click the button

if (button) {
  button.click();
}
else {
  console.log("Error");
}

js click on button

window.onload = function() {
    var userImage = document.getElementById('imageOtherUser');
    var hangoutButton = document.getElementById("hangoutButtonId");
    userImage.onclick = function() {
       hangoutButton.click(); // this will trigger the click event
    };
};

javascript button click event

<element onclick="functionToExecute()">Click</element>

click function in js

$('.btn').click(function() {
  $('[title=selected]').removeAttr("title");
  $(this).attr("title", "selected");
});