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같은 속성을 여러번 정의했을 때 우선순위가 높은 설정값이 최종적으로 적용됩니다.

 

만약 나중에 설정한 값이 적용되지 않게 하려면 속성값 뒤에 !important를 붙이면 됩니다.

 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
    
    <title>Document</title>
    <style>
        div{
            border-color:black;
            border-style:solid;
        }
    </style>
</head>
<body>
    <div class ="container" style="border-color: blue;">
        <iframe src ="TopBanner.html" height="400px"; width ="500px" scrolling="no" ></iframe>
    </div>
</body>
</html>

인라인 스타일은 힘이 강하죠 그래서 blue가 적용되는 것입니다.

 

 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.0-beta2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-BmbxuPwQa2lc/FVzBcNJ7UAyJxM6wuqIj61tLrc4wSX0szH/Ev+nYRRuWlolflfl" crossorigin="anonymous">
    
    <title>Document</title>
    <style>
        div{
            border-color:black !important;
            border-style:solid;
        }
    </style>
</head>
<body>
    <div class ="container" style="border-color: blue;">
        <iframe src ="TopBanner.html" height="400px"; width ="500px" scrolling="no" ></iframe>
    </div>
</body>
</html>

하지만 !important를 적용시켰을 때 이렇게 바뀝니다.

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