CSSだけを使い追従型サイドメニューをマウスオーバーでスライド表示させる方法

css | 2017.01.07

追従型サイドメニューをマウスオーバーでスライド表示させる方法を紹介したいと思います。
今回ご紹介するサンプルは２つあります。
「ホバーした際にメニュー全体をスライド表示させるタイプ」、「ホバーした項目だけスライド表示させるタイプ」
の２つです。

ホバーした際にメニュー全体をスライド表示させるタイプ

HTML

<ul id="nav1">
  <li><a class="nav_icon01" href="#"><span>リンク１</span></a></li>
  <li><a class="nav_icon02" href="#"><span>リンク２</span></a></li>
  <li><a class="nav_icon03" href="#"><span>リンク３</span></a></li>
  <li><a class="nav_icon04" href="#"><span>リンク４</span></a></li>
</ul>

</ul>

CSS

#nav1 {
    font-family: "ヒラギノ角ゴ Pro W3","Hiragino Kaku Gothic Pro","メイリオ",Meiryo,Osaka,sans-serif;
    font-size: 14px;
    line-height: 1.6;
    list-style: none;
    position: fixed;
    right: -85px;
    top: 50px;
  }
  #nav1 a span{
    transition: margin .5s;
  }
  #nav1:hover a span{
    margin-right: 100px;
  }
  #nav1 li{
    counter-increment: count;
  }
  #nav1 li a {
    border: 1px solid #fff;
    color: #fff;
    display: block;
    font-size: 16px;
    font-weight: bold;
    height: 64px;
    line-height: 64px;
    padding: 0 20px 0 60px;
    position: relative;
    text-decoration: none;
  }
  #nav1 li a:before {
    border: 3px solid #fff;
    border-radius: 18px;
    content: counter(count);
    color: #fff;
    font-size: 16px;
    height: 30px;
    left: 10px;
    line-height: 30px;
    position: absolute;
    top: 14px;
    text-align: center;
    width: 30px;
  }

  #nav1 li a:hover {
    opacity: 0.6;
  }

  #nav1 li .nav_icon01{
    background:#40AAEF;
  }

  #nav1 li .nav_icon02{
    background:#58BE89;
  }

  #nav1 li .nav_icon03{
    background:#FBA848;
  }

  #nav1 li .nav_icon04{
    background:#F27398;
  }

#nav1 {

font-family: "ヒラギノ角ゴ Pro W3","Hiragino Kaku Gothic Pro","メイリオ",Meiryo,Osaka,sans-serif;

font-size: 14px;

line-height: 1.6;

list-style: none;

position: fixed;

right: -85px;

top: 50px;

}

#nav1 a span{

transition: margin .5s;

}

#nav1:hover a span{

margin-right: 100px;

}

#nav1 li{

counter-increment: count;

}

#nav1 li a {

border: 1px solid #fff;

color: #fff;

display: block;

font-size: 16px;

font-weight: bold;

height: 64px;

line-height: 64px;

padding: 0 20px 0 60px;

position: relative;

text-decoration: none;

}

#nav1 li a:before {

border: 3px solid #fff;

border-radius: 18px;

content: counter(count);

color: #fff;

font-size: 16px;

height: 30px;

left: 10px;

line-height: 30px;

position: absolute;

top: 14px;

text-align: center;

width: 30px;

}

#nav1 li a:hover {

opacity: 0.6;

}

#nav1 li .nav_icon01{

background:#40AAEF;

}

#nav1 li .nav_icon02{

background:#58BE89;

}

#nav1 li .nav_icon03{

background:#FBA848;

}

#nav1 li .nav_icon04{

background:#F27398;

}

ホバーした項目だけスライド表示させるタイプ

<ul id="nav2">
  <li class="nav01"><a class="nav_icon01" href="#"><span>リンク１</span></a></li>
  <li class="nav02"><a class="nav_icon02" href="#"><span>リンク２</span></a></li>
  <li class="nav03"><a class="nav_icon03" href="#"><span>リンク３</span></a></li>
  <li class="nav04"><a class="nav_icon04" href="#"><span>リンク４</span></a></li>
</ul>

</ul>

  #nav2 {
    font-family: "ヒラギノ角ゴ Pro W3","Hiragino Kaku Gothic Pro","メイリオ",Meiryo,Osaka,sans-serif;
    font-size: 14px;
    line-height: 1.6;
    list-style: none;
    position: fixed;
    right: 0;
    top: 50px;
  }
  #nav2 li{
    counter-increment: count;
    position: absolute;
    right: -100px;
    transition: all .5s;
  }
  #nav2 li a {
    border-top: 1px solid #fff;
    border-left: 1px solid #fff;
    border-bottom: 1px solid #fff;
    color: #fff;
    display: block;
    font-size: 16px;
    font-weight: bold;
    height: 64px;
    line-height: 64px;
    padding: 0 20px 0 60px;
    position: relative;
    text-decoration: none;
    width: 80px;
  }
  #nav2 li a:before {
    border: 3px solid #fff;
    border-radius: 18px;
    content: counter(count);
    color: #fff;
    font-size: 16px;
    height: 30px;
    left: 10px;
    line-height: 30px;
    position: absolute;
    top: 14px;
    text-align: center;
    width: 30px;
  }

  #nav2 li:hover{
    right: 0;
    opacity: 0.6;
  }

  #nav2 .nav01{
    top: 0;
  }

  #nav2 li .nav_icon01{
    background:#40AAEF;
  }

  #nav2 .nav02{
    top: 66px;
  }

  #nav2 li .nav_icon02{
    background:#58BE89;
  }

  #nav2 .nav03{
    top: 132px;
  }

  #nav2 li .nav_icon03{
    background:#FBA848;
  }

  #nav2 .nav04{
    top: 198px;
  }

  #nav2 li .nav_icon04{
    background:#F27398;
  }

#nav2 {

font-family: "ヒラギノ角ゴ Pro W3","Hiragino Kaku Gothic Pro","メイリオ",Meiryo,Osaka,sans-serif;

font-size: 14px;

line-height: 1.6;

list-style: none;

position: fixed;

right: 0;

top: 50px;

}

#nav2 li{

counter-increment: count;

position: absolute;

right: -100px;

transition: all .5s;

}

#nav2 li a {

border-top: 1px solid #fff;

border-left: 1px solid #fff;

border-bottom: 1px solid #fff;

color: #fff;

display: block;

font-size: 16px;

font-weight: bold;

height: 64px;

line-height: 64px;

padding: 0 20px 0 60px;

position: relative;

text-decoration: none;

width: 80px;

}

#nav2 li a:before {

border: 3px solid #fff;

border-radius: 18px;

content: counter(count);

color: #fff;

font-size: 16px;

height: 30px;

left: 10px;

line-height: 30px;

position: absolute;

top: 14px;

text-align: center;

width: 30px;

}

#nav2 li:hover{

right: 0;

opacity: 0.6;

}

#nav2 .nav01{

top: 0;

}

#nav2 li .nav_icon01{

background:#40AAEF;

}

#nav2 .nav02{

top: 66px;

}

#nav2 li .nav_icon02{

background:#58BE89;

}

#nav2 .nav03{

top: 132px;

}

#nav2 li .nav_icon03{

background:#FBA848;

}

#nav2 .nav04{

top: 198px;

}

#nav2 li .nav_icon04{

background:#F27398;

}

＜参考にさせて頂いた記事＞
jQuery マウスオーバーで横からパネルかメニューをニューっと出す