Element: overflow event

The overflow event is fired when an element has been overflowed by its content or has been rendered for the first time in this state (only works for elements styled with overflow != visible).

It is a proprietary event specific to Gecko (Firefox).

Examples

<div id="wrapper">
    <div id="child"></div>
</div>
<br/>
<label><input type="checkbox" id="toggle" checked/> Overflow</label>

<style>
 #wrapper {
    width: 20px;
    height: 20px;
    background: #000;
    padding: 5px;
    overflow: hidden;
  }

  #child {
    width: 40px;
    height: 40px;
    border: 2px solid grey;
    background: #ccc;
  }
</style>

<script>
  var wrapper = document.getElementById("wrapper"),
      child = document.getElementById("child"),
      toggle = document.getElementById("toggle");

  wrapper.addEventListener("overflow", function( event ) {
      console.log( event );
  }, false);

  wrapper.addEventListener("underflow", function( event ) {
      console.log( event );
  }, false);

  toggle.addEventListener("change", function( event ) {
      if ( event.target.checked ) {
          child.style.width = "40px";
          child.style.height = "40px";
      } else {
          child.style.width = "10px";
          child.style.height = "10px";
      }

  }, false);
</script>

Specifications

Not part of any specification.

Browser compatibility

See also

• Related events: underflow