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스크롤 위쪽까지 셀렉션을 확장시킵니다.Extend the selection above the scroll

Parameters:

Name	Type	Description
actionName	String액션 이름	'extendPageUp' extend the selection above the scroll API

Example:

Code Block

language	js
theme	Emacs

editor.execCommand('extendPageUp');

...

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