Document: queryCommandSupported() method

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.

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

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

Syntax

js
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

js
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.

Browser compatibility

See also