初心者でも簡単実装！すぐ使える4種類のハンバーガーメニュー！コーディング説明付き！

HTMLとCSS（SCSS）だけで出来る！
お洒落なアニメーション付きハンバーガーメニューです！今回ご紹介するのはこちらの4種類！

1 下にポンポンっと広がるメニュー

2 まわりにポンポンっと広がるメニュー

3 右にポンポンっと広がるメニュー

4 右にプニプニっと伸びるメニュー

1 下にポンポンっと広がるメニュー（サンプル）

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">

<nav class="menu">
<input type="checkbox" href="#" class="menu-open" name="menu-open" id="menu-open"/>
<label class="menu-open-button" for="menu-open">
<span class="hamburger hamburger-1"></span>
<span class="hamburger hamburger-2"></span>
<span class="hamburger hamburger-3"></span>
</label>

<a href="#" class="menu-item"> <i class="fa fa-bar-chart"></i> </a>
<a href="#" class="menu-item"> <i class="fa fa-plus"></i> </a>
<a href="#" class="menu-item"> <i class="fa fa-heart"></i> </a>
<a href="#" class="menu-item"> <i class="fa fa-envelope"></i> </a>
<a href="#" class="menu-item"> <i class="fa fa-cog"></i> </a>

</nav>


<!-- filters -->
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<filter id="shadowed-goo">

<feGaussianBlur in="SourceGraphic" result="blur" stdDeviation="10" />
<feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 18 -7" result="goo" />
<feGaussianBlur in="goo" stdDeviation="3" result="shadow" />
<feColorMatrix in="shadow" mode="matrix" values="0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 -0.2" result="shadow" />
<feOffset in="shadow" dx="1" dy="1" result="shadow" />
<feBlend in2="shadow" in="goo" result="goo" />
<feBlend in2="goo" in="SourceGraphic" result="mix" />
</filter>
<filter id="goo">
<feGaussianBlur in="SourceGraphic" result="blur" stdDeviation="10" />
<feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 18 -7" result="goo" />
<feBlend in2="goo" in="SourceGraphic" result="mix" />
</filter>
</defs>
</svg>

CSS（SCSS）

@import "compass/css3";

//vars
$fg:#ff4081;
$bg:#3f51b5;
$pi:3.14;

//config
$menu-items:5;
$open-distance:115px;
$opening-angle:$pi - .2;

body{
background:$bg;
color:white;
text-align:center;
}
a{
color:inherit;
}
h1, h2, h3, h4{
margin:0;
margin-bottom:10px;
margin-top:10px;
}
h1{
font-size:3em;
}
%goo{
filter:url('#shadowed-goo');
// debug
// background:rgba(255,0,0,0.2);
}
%ball{
background:$fg;
border-radius:100%;
width:80px;
height:80px;
margin-left:-40px;
position:absolute;
top:20px;
color:white;
text-align:center;
line-height:80px;
transform:translate3d(0,0,0);
transition:transform ease-out 200ms;
}
.menu-open{
display:none;
}
.menu-item{
@extend %ball;
}
.hamburger{
$width:25px;
$height:3px;
width:$width;
height:$height;
background:white;
display:block;
position:absolute;
top:50%;
left:50%;
margin-left:-$width/2;
margin-top:-$height/2;
transition:transform 200ms;
}
$hamburger-spacing:8px;
.hamburger-1{
transform:translate3d(0,-$hamburger-spacing,0);
}
.hamburger-2{
transform:translate3d(0,0,0);
}
.hamburger-3{
transform:translate3d(0,$hamburger-spacing,0);
}
.menu-open:checked+.menu-open-button{
.hamburger-1{
transform:translate3d(0,0,0) rotate(45deg);
}
.hamburger-2{
transform:translate3d(0,0,0) scale(0.1,1);
}
.hamburger-3{
transform:translate3d(0,0,0) rotate(-45deg);
}
}
.menu{
@extend %goo;
$width:380px;
$height:250px;
position:absolute;
left:50%;
margin-left:-$width/2;
padding-top:20px;
padding-left:$width/2;
width:$width;
height:$height;
box-sizing:border-box;
font-size:20px;
text-align:left;
}


.menu-item{
&:hover{
background:white;
color:$fg;
}
@for $i from 1 through $menu-items{
&:nth-child(#{$i+2}){
transition-duration:10ms+(60ms*($i));
}
}
}

.menu-open-button{
@extend %ball;
z-index:2;
transition-timing-function:cubic-bezier(0.175, 0.885, 0.320, 1.275);
transition-duration:400ms;
transform:scale(1.1,1.1) translate3d(0,0,0);
cursor:pointer;
}
.menu-open-button:hover{
transform:scale(1.2,1.2) translate3d(0,0,0);
}
.menu-open:checked+.menu-open-button{
transition-timing-function:linear;
transition-duration:200ms;
transform:scale(0.8,0.8) translate3d(0,0,0);
}

.menu-open:checked~.menu-item{
transition-timing-function:cubic-bezier(0.935, 0.000, 0.340, 1.330);
@for $i from 1 through $menu-items{
$angle:(($pi - $opening-angle)/2)+(($opening-angle/($menu-items - 1))*($i - 1));

&:nth-child(#{$i+2}){
transition-duration:80ms+(80ms*$i);
transform:translate3d(cos($angle)*$open-distance,sin($angle)*$open-distance,0);
}
}
}

2ー4は、有料です。