JavaScript Reference/Javascript Properties/effectAllowed
Версия от 18:30, 25 мая 2010; (обсуждение)
Содержание
"effectAllowed" Example
<!--
Example revised from
The Web Programmer"s Desk Reference
by Lazaro Issi Cohen and Joseph Issi Cohen
ISBN: 1593270119
Publisher: No Starch Press 2004
-->
<html>
<head>
<script language="JavaScript">
function transferDrop() {
window.event.srcElement.innerText = window.event.dataTransfer.getData("text");
window.event.returnValue = false;
}
function transferDrag() {
window.event.dataTransfer.dropEffect = "move";
window.event.returnValue = false;
}
</script>
</head>
<body bottommargin="150">
<p id="mySource"
ondragstart="window.event.dataTransfer.effectAllowed="move";">
Highlight text in this paragraph and drag it to the text area bellow
</p>
<textarea id="myTarget"
ondrop="transferDrop();"
ondragover="window.event.returnValue = false;"
ondragenter="transferDrag();">
</textarea>
"effectAllowed" is applied to
+----------------+--------------------------------------------------------------+
| Applied_To |dataTransfer |
+----------------+--------------------------------------------------------------+
"effectAllowed" Possible Values
Possible Values
copy allows the copy operation,
link allows the selection to be linked with the drop target
move allows the selection to be moved to the drop target
copyLink allows the copy or link operation,
depending on the target settings,
copyMove allows the copy or move operation,
depending on the target settings,
linkMove allows the link or move operation,
depending on the target settings,
all allows all drop effects),
none no drop effect is allowed and
the no-drop cursor is shown
uninitialized the default; the effectAllowed property
has not been initialized yet
"effectAllowed" Syntax and Note
Note:
Read and write property.
Sets the data transfer operation.
This property must be accompanied by the dropEffect property.
Syntax:
window.event.dataTransfer.effectAllowed = value