DataTransferItem.getAsString()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2016年11月.
DataTransferItem.getAsString() 当 DataTransferItem 对象的 kind 属性是一个普通 Unicode 字符串时，该方法会用 DataTransferItem 对象的 kind 属性作为入参来执行传入的回调函数 (i.e. kind is string).
示例
dataTransferItem.getAsString(callback);
Parameters
callback-
A callback function that has access to the
data transfer item'sstring data. See Callback below for details.
Return value
undefined Callback
The callback parameter is a callback function which accepts one parameter:
DOMString-
The drag data item's string data.
The callback return value is undefined.
Example
This example shows the use of the getAsString() method as an inline function in a drop event handler.
js
function drop_handler(ev) { console.log("Drop"); ev.preventDefault(); var data = ev.dataTransfer.items; for (var i = 0; i < data.length; i += 1) { if (data[i].kind == "string" && data[i].type.match("^text/plain")) { // This item is the target node data[i].getAsString(function (s) { ev.target.appendChild(document.getElementById(s)); }); } else if (data[i].kind == "string" && data[i].type.match("^text/html")) { // Drag data item is HTML console.log("... Drop: HTML"); } else if ( data[i].kind == "string" && data[i].type.match("^text/uri-list") ) { // Drag data item is URI console.log("... Drop: URI"); } else if (data[i].kind == "file" && data[i].type.match("^image/")) { // Drag data item is an image file var f = data[i].getAsFile(); console.log("... Drop: File "); } } } Specifications
| Specification |
|---|
| HTML # dom-datatransferitem-getasstring-dev |