document.queryCommandSupported

The Document.queryCommandSupported() method reports whether or not the specified editor command is supported by the browser.

Syntax

isSupported = document.queryCommandSupported(command);

Parameters

command

The command for which to determine support.

Return value

Returns a Boolean which is true if the command is supported and false if the command isn't.

Notes

The 'paste' command return false not only if the feature is unavailable, but also if the script calling it has insufficient privileges to perform the action [1]

Example

var flg = document.queryCommandSupported("SelectAll");

if(flg) {
  // ...Do something
}

Specifications

Specification	Status	Comment
HTML Editing APIs The definition of 'querycommandsupported' in that specification.	Editor's Draft	Initial definition

Browser compatibility

[1] Before Firefox 41, for the command 'paste' Firefox incorrectly returned true when the paste feature was available but the calling script had insufficient privileges to actually perform the action.

See also

• Document.execCommand()
• Document.queryCommandEnabled()