非标
此特征是非标准的，且不在标准轨道中。不要在面向 Web 的生产站点中使用它：它不适用于每个用户。实现之间可能存在大的不兼容性，且行为将来可能改变。
弃用
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the
兼容性表格
at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
DataTransfer.mozGetDataAt()
method is used to retrieve an item in the drag event's
data transfer
object, based on a given
format
and
index
。此方法返回
null
if the specified item does not exist or if the index is not in the range from zero to the number of items minus one.
nsIVariant dataTransfer.mozGetDataAt([type], index);
string
representing the type of the drag data to retrieve from the
drag data object
.
unsigned long
representing the index of the data to retrieve.
nsIVariant
null
被返回。
This example shows the use of the
mozGetDataAt()
method in a
drop
event handler.
function drop_handler(event)
{
var dt = event.dataTransfer;
var count = dt.mozItemCount;
output("Items: " + count + "\n");
for (var i = 0; i < count; i++) {
output(" Item " + i + ":\n");
var types = dt.mozTypesAt(i);
for (var t = 0; t < types.length; t++) {
output(" " + types[t] + ": ");
try {
var data = dt.mozGetDataAt(types[t], i);
output("(" + (typeof data) + ") : <" + data + " >\n");
} catch (ex) {
output("<>\n");
dump(ex);
}
}
}
}
This method is not defined in any Web standard.
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
mozGetDataAt
非标
|
Chrome No | Edge No | Firefox ? — 71 | IE No | Opera No | Safari No | WebView Android No | Chrome Android No | Firefox Android ? | Opera Android No | Safari iOS No | Samsung Internet Android No |
不支持
兼容性未知
实验。期望将来行为有所改变。
非标。预期跨浏览器支持较差。
DataTransfer