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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 compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	17	Yes	41 41 9 — 41 `paste` argument incorrectly returned `true` when the paste feature was available but the calling script had insufficient privileges to actually perform the action.	4	?	?

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	Yes	Yes	Yes	41 41 9 — 41 `paste` argument incorrectly returned `true` when the paste feature was available but the calling script had insufficient privileges to actually perform the action.	?	?	?