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<!DOCTYPE html>
<title>drag & drop - writing to dropEffect</title>
<style>
body > div {
height: 200px;
width: 200px;
background-color: orange;
position: absolute;
top: 8px;
left: 8px;
}
body > div * {
display: none;
}
body > div + div {
background-color: navy;
left: 250px;
}
body > div + div + div {
background-color: fuchsia;
left: 500px;
}
p:first-of-type {
margin-top: 220px;
}
</style>
<script>
window.onload = function() {
var orange = document.getElementsByTagName('div')[0], fails = [], doneonce = false, seenevent = {};
orange.ondragstart = function(e) {
e.dataTransfer.setData('Text', 'dummy text');
e.dataTransfer.effectAllowed = 'all';
if( seenevent[e.type] ) { return; }
seenevent[e.type] = true;
if( e.dataTransfer.dropEffect != 'none' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of none';
}
try{ e.dataTransfer.dropEffect = 'move' } catch(err) {
fails[fails.length] = e.type + ' dropEffect threw on setting';
}
if( e.dataTransfer.dropEffect != 'move' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of move (seems to be readonly)';
}
};
orange.ondrag = orange.nextSibling.ondragleave = function(e) {
if( seenevent[e.type] ) { return; }
seenevent[e.type] = true;
if( e.dataTransfer.dropEffect != 'none' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of none';
}
try{ e.dataTransfer.dropEffect = 'move' } catch(err) {
fails[fails.length] = e.type + ' dropEffect threw on setting';
}
if( e.dataTransfer.dropEffect != 'move' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of move (seems to be readonly)';
}
};
orange.nextSibling.ondragenter = function(e) {
e.preventDefault();
if( seenevent[e.type] ) { return; }
seenevent[e.type] = true;
if( e.dataTransfer.dropEffect != 'copy' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of copy';
}
try{ e.dataTransfer.dropEffect = 'move' } catch(err) {
fails[fails.length] = e.type + ' dropEffect threw on setting';
}
if( e.dataTransfer.dropEffect != 'move' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of move (seems to be readonly)';
}
};
orange.nextSibling.ondragover = function(e) {
e.preventDefault();
if( seenevent[e.type] ) {
e.dataTransfer.dropEffect = 'link';
return;
}
if( !doneonce ) {
if( e.dataTransfer.dropEffect != 'copy' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of copy';
}
try{ e.dataTransfer.dropEffect = 'move' } catch(err) {
fails[fails.length] = e.type + ' dropEffect threw on setting';
}
if( e.dataTransfer.dropEffect != 'move' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of move (seems to be readonly)';
}
doneonce = true;
} else {
seenevent[e.type] = true;
if( e.dataTransfer.dropEffect != 'copy' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of copy on second attempt';
}
try{ e.dataTransfer.dropEffect = 'link' } catch(err2) {
fails[fails.length] = e.type + ' dropEffect threw on setting';
}
if( e.dataTransfer.dropEffect != 'link' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of link on second attempt (seems to be readonly)';
}
doneonce = true;
}
};
orange.nextSibling.ondrop = function(e) {
e.preventDefault();
if( seenevent[e.type] ) { return; }
seenevent[e.type] = true;
if( e.dataTransfer.dropEffect != 'link' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of link';
}
try{ e.dataTransfer.dropEffect = 'move' } catch(err) {
fails[fails.length] = e.type + ' dropEffect threw on setting';
}
if( e.dataTransfer.dropEffect != 'move' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of move (seems to be readonly)';
}
};
orange.ondragend = function(e) {
if( seenevent[e.type] ) { return; }
seenevent[e.type] = true;
if( e.dataTransfer.dropEffect != 'move' ) {
//under-specified in the spec, but part of the spec related to cancelling a drag says:
//"set the current drag operation to the value of the dropEffect attribute of the DragEvent
//object's dataTransfer object as it stood after the event dispatch finished."
//this does not cover successful drags, but it makes sense to be consistent
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of move';
}
try{ e.dataTransfer.dropEffect = 'copy' } catch(err) {
fails[fails.length] = e.type + ' dropEffect threw on setting';
}
if( e.dataTransfer.dropEffect != 'copy' ) {
fails[fails.length] = e.type + ' dropEffect ' + e.dataTransfer.dropEffect + ' instead of copy (seems to be readonly)';
}
if( !seenevent.dragstart ) {
fails[fails.length] = 'dragstart did not fire';
}
if( !seenevent.drag ) {
fails[fails.length] = 'drag did not fire';
}
if( !seenevent.dragenter ) {
fails[fails.length] = 'dragenter did not fire';
}
if( !seenevent.dragover ) {
fails[fails.length] = 'dragover did not fire enough times';
}
if( !seenevent.dragleave ) {
fails[fails.length] = 'dragleave did not fire';
}
if( !seenevent.drop ) {
fails[fails.length] = 'drop did not fire';
}
document.getElementsByTagName('p')[0].innerHTML = fails.length ? ( 'FAIL: ' + fails.join('<br>') ) : 'PASS';
};
};
</script>
<div draggable='true'></div><div></div><div></div>
<p>Use your pointing device to drag the orange box to the pink box, then back to the blue box, and release it.</p>
<noscript><p>Enable JavaScript and reload</p></noscript>
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