Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URLs added here will be added as <link>s in order, and before the CSS in the editor. You can use the CSS from another Pen by using its URL and the proper URL extension.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Auto Save

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <head>
  <meta name="viewport" content="width=device-width,initial-scale=1.0">
  <!--==============レイアウトを制御する独自のCSSを読み込み===============-->
  <link rel="stylesheet" type="text/css" href="https://assets.codepen.io/6329135/reset.css">
</head>

<body>
  <div class="btn-position">
    <a href="#" class="btn bordercircle1"><span>左上と右下から枠線が伸びて<br>塗りに その1</span></a>
    <a href="#" class="btn bordercircle2"><span>左下から反時計回りに枠線が伸びて<br>塗りに</span></a>
    <a href="#" class="btn bordercircle3"><span>左上と右下から枠線が伸びて<br>塗りに その2</span></a>
  </div>
</body>
              
            
!

CSS

              
                @charset "utf-8";

/*== ボタン共通設定 */
.btn {
  /*アニメーションの起点とするためrelativeを指定*/
  position: relative;

  /*ボタンの形状*/
  display: inline-block;
  margin: 10px 0;

  color: #333;
  border: 1px solid rgba(255, 255, 255, 0.18);
  text-decoration: none;
  text-align: center;
  outline: none;

  background-color: rgba(255, 255, 255, 0.3);
  font-size: clamp(0.8rem, 2vw, 1rem); /*ボタンのテキストを全て統一*/
  width: clamp(300px, 50vw, 500px); /*ボタンの横幅を全て統一*/

  backdrop-filter: blur(6.5px);
  -webkit-backdrop-filter: blur(6.5px);

  box-shadow: rgba(142, 142, 142, 0.19) 0px 6px 15px 0px;
  -webkit-box-shadow: rgba(142, 142, 142, 0.19) 0px 6px 15px 0px;

  /*アニメーションの指定*/
  transition: all 0.3s;
  transition-delay: 0.7s; /*0.7秒遅れてアニメーション*/
}

/*hoverした際のボタンの形状*/
.btn:hover {
  color: rgb(90, 150, 255);
  font-weight: 600;
  font-size: 1.1em;
  border-color: rgba(90, 150, 255, 0.5);
}

/*線の設定*/
.btn span {
  padding: 15px 0;
  display: block;
}

/*横線の設定*/
.btn::before,
.btn::after {
  content: "";
  /*絶対配置で線の位置を決める*/
  position: absolute;
  /*線の形状*/
  width: 0;
  height: 5px;
  background: rgb(90, 150, 255);
  /*アニメーションの指定*/
  transition: all 0.2s linear;
}

/*縦線の設定*/
.btn span::before,
.btn span::after {
  content: "";
  /*絶対配置で線の位置を決める*/
  position: absolute;
  /*線の形状*/
  width: 5px;
  height: 0;
  background: rgb(90, 150, 255);
  /*アニメーションの指定*/
  transition: all 0.2s linear;
}

/*hoverした際、線が縦横100%伸びる*/
.btn:hover::before,
.btn:hover::after {
  width: 100%;
}
.btn:hover span::before,
.btn:hover span::after {
  height: 100%;
}

/*== 左上と右下から枠線が伸びて塗りに */

/*横線が0.2秒送れて出現*/
.bordercircle1::before {
  right: 0;
  top: 0;
  transition-delay: 0.2s;
}
.bordercircle1::after {
  left: 0;
  bottom: 0;
  transition-delay: 0.2s;
}

/*縦線が出現*/
.bordercircle1 span::before {
  left: 0;
  top: 0;
}
.bordercircle1 span::after {
  right: 0;
  bottom: 0;
}

/*== 左下⇒右下⇒右上⇒左上⇒左下に枠線が伸びて塗りに */

/*左下から右下へ伸びる横線*/
.bordercircle2::after {
  left: 0;
  bottom: 0;
}

/*右下から上へ伸びる縦線*/
.bordercircle2 span::after {
  right: 0;
  bottom: 0;
  transition-delay: 0.2s;
}

/*右上から左上へ伸びる横線*/
.bordercircle2::before {
  right: 0;
  top: 0;
  transition-delay: 0.4s;
}

/*左上から左下へ伸びる横線*/
.bordercircle2 span::before {
  left: 0;
  top: 0;
  transition-delay: 0.6s;
}

/*== 左上と右下から枠線が伸びて塗りに */

/*右下から右上へ伸びる横線*/
.bordercircle3::after {
  right: 0;
  bottom: 0;
  transition-duration: 0.4s;
}

/*右下から右上へ伸びる縦線*/
.bordercircle3 span::after {
  right: 0;
  bottom: 0;
  transition-duration: 0.4s;
}

/*左上から右上へ伸びる横線*/
.bordercircle3::before {
  left: 0;
  top: 0;
  transition-duration: 0.4s;
}

/*左上から左下へ伸びる横線*/
.bordercircle3 span::before {
  left: 0;
  top: 0;
  transition-duration: 0.4s;
}

/*========= レイアウトのためのCSS ===============*/
body {
  width: 100%;
  height: 100vh;
  vertical-align: middle;
  padding: 30px 0;
  text-align: center;

  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
  background-image: url("https://assets.codepen.io/6329135/img_06.jpg");
}

/*ボタンの配置*/
.btn-position {
  display: flex;
  flex-direction: column;
  align-items: center;
}

p {
  margin: 0 0 10px 0;
}

              
            
!

JS

              
                
              
            
!
999px

Console