The Document.queryCommandEnabled()
method reports whether or not the specified editor command is enabled by the browser.
isEnabled = document.queryCommandEnabled(command);
command
Returns a Boolean
which is true
if the command is enabled and false
if the command isn't.
cut
' and 'copy
' commands the method only returns true when called from a user-initiated thread.'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.var flg = document.queryCommandEnabled("SelectAll"); if(flg) { document.execCommand("SelectAll", false, null); // command is enabled, run it }
Specification | Status | Comment |
---|---|---|
HTML Editing APIs The definition of 'querycommandenabled' in that specification. | Editor's Draft | Initial definition |
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | 17 | (Yes) | 9.0 (9.0)[1] | 4.0 | ? | ? |
Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | ? | (Yes) | 9.0 (9.0)[1] | ? | ? | ? |
[1] Before Firefox 41, queryCommandEnabled()
with arguments cut
, copy
or paste
would throw errors unless the script had special privileges.
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https://developer.mozilla.org/en-US/docs/Web/API/document/queryCommandEnabled