CodePen Embed - jqueryrkFS

<body>
  <div id="vis">내용1</div>
  <div>내용2</div>
</body>

#vis {
  display: none;
}

$(document).ready(function() {
  console.log($("div:hidden").text());
  $("div:visible").css("background", "orange");
});

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This Pen doesn't use any external CSS resources.