mirror of
https://github.com/servo/servo
synced 2026-04-29 02:47:55 +02:00
62 lines
2.2 KiB
HTML
62 lines
2.2 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>Drag and drop without cancelling dragenter on body</title>
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<style type="text/css">
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div:first-child {
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height: 100px;
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width: 100px;
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background: orange;
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display: inline-block;
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}
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div:first-child + div {
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height: 100px;
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width: 100px;
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margin-left: 100px;
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background: blue;
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display: inline-block;
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}
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</style>
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<script type="text/javascript">
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//If dragenter is cancelled the body should then become the target element, receiving both a dragenter and a dragover event.
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//When the body is the actual immediate user selection (first time over the body), that means it gets *2* dragenter events
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//Then when a div becomes immediate user selection (blue) but does not cancel the dragenter event, dragenter does not need
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//to fire on body because body is already the current target element
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//Then when the body is the actual immediate user selection again (second time over the body), it is already the current
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//target element, so does not get a dragenter event
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window.onload = function () {
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var drag = document.getElementsByTagName('div')[0], beforecount = 0, aftercount = 0, switchcount = false;
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drag.ondragstart = function (e) {
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e.dataTransfer.setData('text','hello');
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e.dataTransfer.effectAllowed = 'copy';
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};
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drag.ondragenter = drag.ondrop = drag.ondragover = function (e) {
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e.preventDefault();
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};
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var drop = document.getElementsByTagName('div')[1];
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drop.ondragenter = function (e) {
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switchcount = true;
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};
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drop.ondragover = function (e) {
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e.preventDefault();
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};
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document.body.ondragenter = function (e) {
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if( e.target != this ) { return; }
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if( switchcount ) { aftercount++; } else { beforecount++; }
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};
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drag.ondragend = function (e) {
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document.getElementsByTagName('div')[2].innerHTML = ( beforecount == 2 && aftercount == 0 ) ? 'PASS' : ( 'FAIL, dragenter fired on body '+beforecount+' time(s) before blue.ondragenter and '+aftercount+' time(s) afterwards, instead of 2 and 0 times respectively' );
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};
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};
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</script>
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</head>
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<body>
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<div draggable="true"></div><div></div>
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<div> </div>
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<p>Drag the orange square onto the blue square, then back to the orange square, and release it.</p>
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<noscript><p>Enable JavaScript and reload</p></noscript>
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</body>
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</html>
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