Stop submit if empty without required #116
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스택오버플로우 글에서 textarea가 required를 체크할 때 hide되어 있는 것이 문제라고 해서 코드를 보니까 다음과 같이 되어 있습니다.
CodeMirror 이슈에서 CodeMirror Maintainer가 이 이슈는 포기한 걸 보고 workaround로 해결했습니다.