A Pen by Mihail Pavlov.

Custom-select.markdown

Custom select(with working select, mobile ready)

Forked from Nikolay Talanov's Pen Custom select.

A Pen by Mihail Pavlov on CodePen.

License.

index.html

<div class="drop" name="name-of-select">  
  <div class="option active placeholder" data-value="placeholder">
    Choose wisely
  </div>
  <div class="option" data-value="wow">
    Wow!
  </div>
  <div class="option" data-value="drop">
    So dropdown!
  </div>
  <div class="option" data-value="select">
    Very select!
  </div>
  <div class="option" data-value="custom">
    Much custom!
  </div>
  <div class="option" data-value="animation"> 
    Such animation!
  </div>
</div>

script.js

$(document).ready(function() {
  var selectHTML = '<select></select>';
  var $drop =  $(".drop");  
  $drop.each(function(index, element){
    $(element).append(selectHTML);
    var $select =  $(element).find("select");
    $select.attr("name",$(element).attr("name"))
    $(element).find(".option").each(function(ind,opt){
      var val = $(opt).data("value");
      var text = $(opt).text();
      $select.append("<option value='"+val+"'>"+text+"</option>");      
    });
  });
  $(".drop .option").click(function() {
    var val = $(this).attr("data-value"),
        $drop = $(this).parent(".drop"),
        prevActive = $drop.find(".option.active").attr("data-value"),
        options = $drop.find(".option").length;
    $drop.find(".option.active").addClass("mini-hack");
    $drop.toggleClass("visible");
    $drop.removeClass("withBG");
    $(this).css("top");
    $drop.toggleClass("opacity");
    $(".mini-hack").removeClass("mini-hack");
    if ($drop.hasClass("visible")) { 
      setTimeout(function() {
        $drop.addClass("withBG");
      }, 400 + options*100); 
      
    }
    triggerAnimation($drop);
    if (val !== "placeholder" || prevActive === "placeholder") {
      $drop.find(".option").removeClass("active");
      $(this).addClass("active");
      if(val !== prevActive){
        $drop.find("select :selected").each(function(){this.selected=false;});
        $drop.find("select option[value='"+val+"']").attr("selected","selected");
      };
    };
    
  });
  
  function triggerAnimation($drop) {
    var finalWidth = $drop.hasClass("visible") ? 22 : 20;
    $drop.css("width", "24em");
    setTimeout(function() {
      $drop.css("width", finalWidth + "em");
    }, 400);
  };
});

style.scss

@import "compass/css3";
$dark: #35414a;
$semilight: #86919a;
$blue: #5aafee;
*, *:before, *:after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
@font-face {
  font-family: pfs-bold;
  src: url('https://s3-us-west-2.amazonaws.com/s.cdpn.io/142996/PFSquareSansPro-Bold.otf');
}
body {
  background: $dark;
}
.drop {
  width: 20em;
  margin: 5em auto;
  font-family: pfs-bold;
  color: $semilight;
  text-transform: uppercase;
  position: relative;
  transition: width 0.5s;
  will-change: width;
  
  .option {
    padding: 1em;
    cursor: pointer;
    background-color: #485761;
    
    &:not(.active) {
      display: none;
      opacity: 0;
      transform: translateY(-50%);
    }
  }
  select{
    display: none;
    @media screen and (max-width: 750px) {
      display: block;
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      width: 100%;
      opacity: 0;
    }
  }
  
  &.visible {
    animation: bounce 1s;
    width: 24em;
    
    &:before, &:after {
      border-color: #fff;
    }
    &:before {
      opacity: 0;
    }
    &:after {
      opacity: 1;
    }
    
    .option {
      color: #fff;
      display: block;
    }
  }
  
  &.opacity {
    
    .option {
      transform: translateZ(0);
      opacity: 1;
      
      @for $i from 0 to 10 {
        &:nth-child(#{$i}) {
          transition: opacity 0.5s 0.1s*$i, transform 0.5s 0.1s*$i;
        }
      }
    }
  }

&.withBG {
  
  .option {
    transition: background-color 0.1s;

    &:not(.placeholder):hover {
      background-color: $blue;
    }

    &:not(.placeholder).active {
      background-color: $blue;
    }
  }
}
  
  &:after, &:before {
    content: "";
    position: absolute;
    top: 1.5em;
    right: 1em;
    width: 0.75em;
    height: 0.75em;
    border: 0.2em solid $semilight;
    transform: rotate(45deg);
    transform-origin: 50% 50%;
    transition: opacity 0.2s;
  }
  &:before {
    border-left: none;
    border-top: none;
    top: 1.2em;
  }
  &:after {
    border-right: none;
    border-bottom: none;
    opacity: 0;
  }
}

.mini-hack {
  opacity: 0;
  transform: translateY(-50%);
}