form target 속성 중 _top 는 어떤 용도일까요?

[heejunghwang]

form target 속성 중 _top 는 어떤 용도일까요?

[youngbeomrhee]

##설명
_top: Load the URL into the top-level browsing context (that is, the "highest" browsing context that is an ancestor of the current one, and has no parent). If there is no parent, this behaves the same way as _self.
(https://developer.mozilla.org/en-US/docs/Web/HTML/Element/a#attr-target)
=> context가 하나인 경우에는 _self 와 동일

##예제
https://github.com/youngbeomrhee/jssample/blob/master/definitive_guide_HTML5/ch_015_containing_contents/ex_005_iframe_submit.html

[heejunghwang]

iframe이나 object의 경우임