Document: queryCommandSupported() method

[!NOTE] Although the execCommand() method is deprecated, if you do decide to use it for reasons given on that page, you should consider checking the command’s availability using queryCommandSupported() to ensure compatibility.

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

Syntax

queryCommandSupported(command)

Parameters

• command
  • : The command for which to determine support.

Return value

Returns a boolean value 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.

Examples

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

if (flg) {
  // Do something…
}

Specifications

This feature is not part of any current specification. It is no longer on track to become a standard. There is an unofficial W3C execCommand spec draft.

Browser compatibility

See also

• execCommand()
• queryCommandEnabled()