<div id="small">Hello</div>
<div id="large">Hello</div>
<!-- https://opentutorials.org/module/2367/13405의 예제 입니다. -->
 *{
            box-sizing:border-box;
        }
        div{
            margin:10px;
            width:150px;
        }
        #small{
            border:10px solid black;
        }
        #large{
            border:30px solid black;
        }

External CSS

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External JavaScript

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