React의 className, tag 자동완성 시켜주는 설정
"emmet.includeLanguages": { "javascript": "javascriptreact" }
.haha -> <div className="haha"></div> h2#secTitle -> <h2 id="secTitle"></h2>
.haha
<div className="haha"></div>
h2#secTitle
<h2 id="secTitle"></h2>