DataTransfer.mozTypesAt()

Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

Deprecated
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 compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

The DataTransfer.mozTypesAt() method returns a list of the format types that are stored for an item at the specified index. If the index is not in the range from 0 to the number of items minus one, an empty string list is returned.

Note: This method is Gecko-specific.

Syntax

nsIVariant dataTransfer.mozTypesAt(index);

Arguments

index: A unsigned long that is the index of the data for which to retrieve the types.

Return value

nsIVariant: A list of data formats (which are strings). If the index is not in the range from 0 to the number of items minus one, an empty string list is returned.

Example

This example shows the use of the mozTypesAt() 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);
      }
    }
  }
}

Specifications

This method is not defined in any Web standard.

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`mozTypesAt` ExperimentalNon-standard	Chrome No support No	Edge No support No	Firefox No support ? — 71	IE No support No	Opera No support No	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android ?	Opera Android No support No	Safari iOS No support No	Samsung Internet Android No support No

Legend

No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.: Non-standard. Expect poor cross-browser support.