使下拉菜单消失

Question

I have a code from W3schools, in which we get dropdown menu after clicked on a button.

Dropdown menu don't disappear when we click anywhere else. I have surfed a bit but it seems confusing as am new to js.

It would be much helpful if anyone could suggest how do we make it disappear?

Code Link

Answer 1

Add the following code somewhere:

document.getElementById("myBtn").onblur = function() {
  document.getElementById("myDropdown").classList.remove("show");
};

The original code that you wrote triggers the addition or removal of the "show" class on the element of id "myBtn" only when this element itself is clicked:

document.getElementById("myBtn").onclick = function() { document.getElementById("myDropdown").classList.toggle("show"); };

But it does nothing if you click outside, that's the role of the onblur event.

Answer 2

<script>
// Get the button, and when the user clicks on it, execute myFunction
document.getElementById("myBtn").onclick = function() {
  myFunction()
};
document.getElementById("myBtn").onblur = function() {
  myFunction();
};

/* myFunction toggles between adding and removing the show class, which is used to hide and show the dropdown content */
function myFunction() {
    document.getElementById("myDropdown").classList.toggle("show");
}
</script>

Answer 3

Use this:

 document.getElementById("myBtn").onblur = function(){ document.getElementById("myDropdown").classList.remove('show') }; 

"onBlur" is the Event for losing the focus