ondragenter = function(event); - Javascript DOM Event

Javascript examples for DOM Event:Element Event Attribute

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Description

The ondragenter event occurs when a draggable element enters a valid drop target.

Summary

Bubbles Yes
Cancelable Yes
Supported HTML tags: All HTML elements

Demo Code

ResultView the demo in separate window 

<!DOCTYPE HTML>
<html>
<head>
<style>
.droptarget {//from www . j a v a 2  s.c o m
    float: left;
    width: 100px;
    height: 35px;
    margin: 15px;
    margin-right: 100px;
    padding: 10px;
    border: 1px solid red;
}
</style>
</head>
<body>

<div class="droptarget">
  <p draggable="true" id="dragtarget">Drag me!</p>
</div>

<div class="droptarget">drop here</div>

<p id="demo"></p>

<script>
document.ondragstart = function(event) {
    event.dataTransfer.setData("Text", event.target.id);
};

document.ondragenter = function(event) {
    if ( event.target.className == "droptarget" ) {
        document.getElementById("demo").innerHTML = "Entered the dropzone";
        event.target.style.backgroundColor = "lightblue";
    }
};

document.ondragover = function(event) {
    event.preventDefault();
};

document.ondragleave = function(event) {
    if ( event.target.className == "droptarget" ) {
        document.getElementById("demo").innerHTML = "Left the dropzone";
        event.target.style.backgroundColor = "";
    }
};

document.ondrop = function(event) {
    event.preventDefault();
    if ( event.target.className == "droptarget" ) {
        event.target.style.backgroundColor = "";
        var data = event.dataTransfer.getData("Text");
        event.target.appendChild(document.getElementById(data));
    }
};
</script>

</body>
</html>

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