javascript - What is the 'the default user interface' referred to by the aShowDefaultUI parameter in element.execCommand()? -

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according api element.execcommand() function, says has 3 parameters: acommandname, ashowdefaultui, avalueargument.

the api's description of first , third parameters clear i'm unsure meaning of second parameter.

this api says:

ashowdefaultui: boolean indicating whether default user interface should shown. not implemented in mozilla.

what referring when says 'the default user interface'?

for reference, i'm using element.execcommand() create own wysiwyg web text editor ever need work in google chrome.


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