Web/API/DataTransfer/mozClearDataAt

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.

DeprecatedThis 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.mozClearDataAt() method removes the data associated with the given format for an item at the specified index. The index must be in the range from zero to the number of items minus one.

If the format argument is not provided, then the data associated with all formats is removed. If the format is not found, then this method has no effect. If the last format for the item is removed, the entire item is removed, reducing mozItemCount by one.

Removing the last format for a particular index removes that item entirely, shifting the remaining items down and changing their indices.

Note: This method is Gecko-specific.

Syntax

void dataTransfer.mozClearDataAt([type], index);

Arguments

type: A string representing the type of the drag data to remove from the drag data object.
index: A unsigned long representing the index of the data to remove.

Return value

void

Example

This example shows the use of the mozClearDataAt() method in a dragend event handler.

function dragend_handler(event)
{
  var dt = event.dataTransfer;
  // Remove a text/html item
  dt.mozClearDataAt("text/html", 1);
}

Specifications

This method is not defined in any Web standard.

Browser compatibility

Update compatibility data on GitHub

	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
`mozClearDataAt` Experimental'Non-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.