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css3 ボタンめにゅー

A Pen By tikyu

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!
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About CSS Preprocessors

CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

     

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

     

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About External Resources

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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HTML

            
              <script
  src="https://code.jquery.com/jquery-3.2.1.min.js"
  integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
  crossorigin="anonymous"></script>
<link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet">

<!--  矢印に変化 -->
<a href="#" class="circle" id="id1">
  <span class="circle-icon" id="icon1"></span>
</a>

<!-- クローズボタンに変化 -->
<a href="#" class="circle" id="id2">
  <span class="circle-icon" id="icon2"></span>
</a>

<!--  ホバーアイテム --> 
<p>
<nav class="items">
  <a href="#" class="test-circle"><i class="fa fa-bars fa-2x"></i></a>
  <a href="#" class="test-circle"><i class="fa fa-code fa-2x"></i></a>
  <a href="#" class="test-circle"><i class="fa fa-tag fa-2x"></i></a>
  <a href="#" class="test-circle"><i class="fa fa-html5 fa-2x"></i></a>
  <a href="#" class="test-circle"><i class="fa fa-css3 fa-2x"></i></a>
</nav>  
</p>
!

CSS

            
              
*, *::before, *::after {
  box-sizing: border-box;
}
body {
  background: #222;
}

/* ================
 サークル部分
================ */
.circle {
  display: block;
  position: relative;
  width: 40px;
  height: 40px;
  /* margin: 20px 0 10px; */
  margin: 10px 0;
  border-radius: 50%;
  background: #fff;
}
.circle:hover {
  background: #fafafa;
}

/* ================
 アイコン部分
================ */
.circle-icon {
  display: block;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 2px;
  /* 上に(height / 2), 左に(width / 2) */
  margin: -1px 0 0 -7px;
  background: #2196F3;
}
.circle-icon::before, 
.circle-icon::after {
  display: block;
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 14px;
  height: 2px;
  background: #2196F3;
  transition: 0.3s;
}
.circle-icon::before {
  margin-top: -6px;
}
.circle-icon::after {
  /* 幅分下に行っているので6pxではなく4px */
  margin-top: 4px;
}

/* ================
 クローズアイコンへ変化 
================ */
.circle .close {
  background: transparent;
}
.circle .close::before,
.circle .close::after {
  margin-top: 0;
}
.circle .close::before {
  transform: rotate(135deg);
}
.circle .close::after {
  transform: rotate(225deg);
}

/* ================
 アローアイコンへ変化
================ */
.circle .arrow::before, 
.circle .arrow::after {
  width: 8px;
}
.circle .arrow::before {
  transform: translate(0, 2px) rotate(-45deg);
}
.circle .arrow::after {
  transform: translate(0, -2px) rotate(45deg);
}

/* ================
 ホバーでメニューがでてくるやつ
================ */
.test-circle {
  display: inline-block;
  width: 50px;
  height: 50px;
  background: white;
  border-radius: 50%;
  transition: 0.3s;
  font-size: 1rem;
  text-align: center;
}
.test-circle i {
  line-height: 1.62; /* 勘 */
}
.test-circle + .test-circle:hover {
  background: #999;
}
.test-circle + .test-circle {
  opacity: 0;
  /* width分のmarginを減らす */
  margin: 0 0 0 -50px;
}
.items {
  display: inline-block;
  transition: 0.3s;
  font-size: 0;
  border: solid red;
}
.items .test-circle:first-child {
  cursor: default;
}
.items:hover .test-circle + .test-circle {
  margin: 0 0 0 10px;
  opacity: 1;
  position: relative;
}
.items:hover .test-circle:first-child {
  transform: rotate(270deg);
}
!

JS

            
              
$(document).ready(function() {
  $("#id1").click(function() {
    $("#icon1").toggleClass("arrow");
    return false;
  });
  $("#id2").click(function() {
     $("#icon2").toggleClass("close");
    return false;
  });
});
!
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