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HTML Style borderTopLeftRadius用法及代码示例


DOM样式borderTopLeftRadius属性用于设置或返回元素左上边界的半径。

用法:

  • 获取borderTopLeftRadius属性
    object.style.borderTopLeftRadius
  • 设置borderTopLeftRadius属性
    object.style.borderTopLeftRadius = "length | percentage | 
initial | inherit"

属性值：


  1. length:用于定义固定长度单位的半径。可以使用两个值来指定四分之一椭圆的半径，第一个值是水平半径，第二个值是垂直半径。

    示例1：使用一个值指定半径。

    <!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <title> 
        DOM Style BorderTopLeftRadius 
    </title> 
  
    <style> 
        .elem { 
            padding:10px; 
            border-style:solid; 
        } 
    </style> 
</head> 
  
<body> 
    <h1 style="color:green"> 
      GeeksforGeeks 
    </h1> 
    <b> 
      DOM Style BorderTopLeftRadius 
    </b> 
    <p class="elem"> 
        GeeksforGeeks is a computer science portal 
      with a huge variety of well written and  
      explained computer science and programming  
      articles, quizzes and interview questions. 
    </p> 
    <button onclick="changeRadius()"> 
      Change borderTopLeftRadius 
    </button> 
  
    <!-- Script to change borderTopLeftRadius -->
    <script> 
        function changeRadius() { 
            elem = document.querySelector('.elem'); 
            elem.style.borderTopLeftRadius = '30px'; 
        } 
    </script> 
</body> 
  
</html>

    输出：

    在单击按钮之前：

    length-one-before

    单击按钮后：

    length-one-after

    示例2：使用两个值指定半径。

    <!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <title> 
        DOM Style BorderTopLeftRadius 
    </title> 
    <style> 
        .elem { 
            padding:10px; 
            border-style:solid; 
        } 
    </style> 
</head> 
  
<body> 
    <h1 style="color:green"> 
      GeeksforGeeks 
    </h1> 
    <b> 
      DOM Style BorderTopLeftRadius 
    </b> 
    <p class="elem"> 
      GeeksforGeeks is a computer science portal 
      with a huge variety of well written and 
      explained computer science and programming 
      articles, quizzes and interview questions. 
    </p> 
    <button onclick="changeRadius()"> 
      Change borderTopLeftRadius 
    </button> 
  
    <!-- Script to change borderTopLeftRadius -->
    <script> 
        function changeRadius() { 
            elem = document.querySelector('.elem'); 
            elem.style.borderTopLeftRadius = '30px 60px'; 
        } 
    </script> 
</body> 
  
</html>

    输出：

    在单击按钮之前：

    length-two-before


    单击按钮后：

    length-two-after

  2. percentage:这用于以百分比为单位定义半径。可以使用两个值来指定四分之一椭圆的半径，第一个值是水平半径，它是边框的宽度的百分比，第二个值是垂直半径，是border-box的高度的百分比。

    示例3：使用一个值指定半径。

    <!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <title> 
        DOM Style BorderTopLeftRadius 
    </title> 
    <style> 
        .elem { 
            padding:10px; 
            border-style:solid; 
        } 
    </style> 
</head> 
  
<body> 
    <h1 style="color:green"> 
      GeeksforGeeks 
    </h1> 
    <b> 
      DOM Style BorderTopLeftRadius 
    </b> 
    <p class="elem"> 
      GeeksforGeeks is a computer science 
      portal with a huge variety of well  
      written and explained computer  
      science and programming articles,  
      quizzes and interview questions. 
    </p> 
    <button onclick="changeRadius()"> 
      Change borderTopLeftRadius 
    </button> 
  
    <!-- Script to change borderTopLeftRadius -->
    <script> 
        function changeRadius() { 
            elem = document.querySelector('.elem'); 
            elem.style.borderTopLeftRadius = '20%'; 
        } 
    </script> 
</body> 
  
</html>

    输出：

    在单击按钮之前：

    percentage-one-before

    单击按钮后：

    percentage-one-after

    示例4：使用两个值指定半径。

    <!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <title> 
        DOM Style BorderTopLeftRadius 
    </title> 
    <style> 
        .elem { 
            padding:10px; 
            border-style:solid; 
        } 
    </style> 
</head> 
  
<body> 
    <h1 style="color:green"> 
      GeeksforGeeks 
    </h1> 
    <b> 
      DOM Style BorderTopLeftRadius 
    </b> 
    <p class="elem"> 
     GeeksforGeeks is a computer science portal 
      with a huge variety of well written and  
      explained computer science and programming 
      articles, quizzes and interview questions. 
    </p> 
    <button onclick="changeRadius()"> 
      Change borderTopLeftRadius 
    </button> 
  
    <!-- Script to change borderTopLeftRadius -->
    <script> 
        function changeRadius() { 
            elem = document.querySelector('.elem'); 
            elem.style.borderTopLeftRadius = '30% 90%'; 
        } 
    </script> 
</body> 
  
</html>

    输出：


    在单击按钮之前：

    percentage-two-before

    单击按钮后：

    percentage-two-after

  3. initial:这用于将此属性设置为其默认值。

    示例5：

    <!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <title> 
        DOM Style BorderTopLeftRadius 
    </title> 
    <style> 
        .elem { 
            padding:10px; 
            border-style:solid; 
            border-top-left-radius:30px; 
        } 
    </style> 
</head> 
  
<body> 
    <h1 style="color:green"> 
      GeeksforGeeks 
    </h1> 
    <b> 
      DOM Style BorderTopLeftRadius 
    </b> 
    <p class="elem"> 
      GeeksforGeeks is a computer science portal 
      with a huge variety of well written and  
      explained computer science and programming  
      articles, quizzes and interview questions. 
    </p> 
    <button onclick="changeRadius()"> 
      Change borderTopLeftRadius 
    </button> 
  
    <!-- Script to change borderTopLeftRadius -->
    <script> 
        function changeRadius() { 
            elem = document.querySelector('.elem'); 
            elem.style.borderTopLeftRadius = 'initial'; 
        } 
    </script> 
</body> 
  
</html>

    输出：

    在单击按钮之前：

    initial-before

    单击按钮后：

    initial-after


  4. 继承6：这将从其父项继承该属性。

    例：

    <!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <title> 
        DOM Style BorderTopLeftRadius 
    </title> 
    <style> 
        #parent { 
            padding:10px; 
            border-style:solid; 
            /* Setting the borderTopLeftRadius of the parent */ 
            border-top-left-radius:30px; 
        } 
          
        .elem { 
            padding:10px; 
            border-style:solid; 
        } 
    </style> 
</head> 
  
<body> 
    <h1 style="color:green"> 
      GeeksforGeeks 
    </h1> 
    <b> 
      DOM Style BorderTopLeftRadius 
    </b> 
    <br> 
    <br> 
    <div id="parent"> 
        <p class="elem"> 
          GeeksforGeeks is a computer science portal 
          with a huge variety of well written and  
          explained computer science and programming 
          articles, quizzes and interview questions. 
        </p> 
    </div> 
    <br> 
    <button onclick="changeRadius()"> 
      Change borderTopLeftRadius 
    </button> 
  
    <!-- Script to change borderTopLeftRadius -->
    <script> 
        function changeRadius() { 
            elem = document.querySelector('.elem'); 
            elem.style.borderTopLeftRadius = 'inherit'; 
        } 
    </script> 
</body> 
  
</html>

    输出：

    在单击按钮之前：

    inherit-before

    单击按钮后：

    inherit-after

支持的浏览器：borderTopLeftRadius属性支持的浏览器如下：

  • 谷歌浏览器
  • Internet Explorer 9.0
  • Firefox
  • Opera
  • 苹果Safari


相关用法


注：本文由纯净天空筛选整理自sayantanm19大神的英文原创作品 HTML | DOM Style borderTopLeftRadius Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。