みかづきブログ その3

3ヶ月つづけてみました。

CSSでポヨンとしたボタンをつくりました。

DEMO

See the Pen Sphere Button by kimmy (@kimmy) on CodePen.


HTML

<div id="nav" data-current-index="0">
  <div class="nav-dot" data-index="0"></div>
  <div class="nav-dot" data-index="1"></div>
  <div class="nav-dot" data-index="2"></div>
  <div class="nav-dot" data-index="3"></div>
</div>

SCSS

%select {
  width: 40px; height: 40px;
  margin: -20px;
  background: linear-gradient(#5C6BC0, #9FA8DA);

  &:after {
    opacity: 1;
  }
}

* {
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  -webkit-touch-callout: none;
  -webkit-user-select: none;
}

body {
  background: #E8EAF6;
}

#nav {
  position: absolute;
  top: 50%;
  left: 0; right: 0;
}

.nav-dot {
  position: absolute;
  left: 50%;
  box-sizing: border-box;
  margin: -16px;
  border: solid #1A237E 6px;
  border-radius: 50%;
  width: 32px; height: 32px;
  background: #fff;
  box-shadow: 0 8px 0 rgba(0, 0, 0, .25);
  cursor: pointer;
  transition: all .2s ease-in-out;

  &:after {
    display: block;
    position: absolute;
    top: 50%; left: 50%;
    margin: -13px -10px;
    border-radius: 10px;
    width: 20px; height: 18px;
    content: "";
    background: linear-gradient(rgba(255, 255, 255, 1), rgba(255, 255, 255, 0));
    opacity: 0;
    transition: all .2s ease-in-out;
  }

  &:nth-child(1) {
    transform: translateX(-90px);
  }
  
  &:nth-child(2) {
    transform: translateX(-30px);
  }
  
  &:nth-child(3) {
    transform: translateX(30px);
  }
  
  &:nth-child(4) {
    transform: translateX(90px);
  }
  
  @for $i from 0 through 3 {
    [data-current-index="#{$i}"] &:nth-child(#{$i + 1}) {
      @extend %select;
    }
  }
}

JavaScript

document.getElementById("nav").addEventListener("click", function(evt) {
  let index = evt.target.dataset.index;

  if (index) {
    this.dataset.currentIndex = index;
  }
}, false);