移动端关于select最佳兼容性解决方案(css)

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支持浏览器

iOS 4/5/6/7/8 - looks good, iOS3 even works fine but isn't quite as pretty
Android 2.2/2.3 (Browser) - looks good
Android 4.0/4.1/4.2 (Browser) - looks good
Android 4.0/4.1/4.2/4.3/4.4 (Chrome) - looks good
WP8 - looks good
Kindle Fire 2/HD - looks good
IE 10/11 - looks good
Safari 5 - looks good
Chrome 22-35 - looks good
Opera 15-22 - looks good

html代码

<div class="button custom-select">
    <select name="" id="">
        <option value="选择1">选择1</option>
        <option value="选择2">选择2</option>
        <option value="选择3">选择3</option>
        <option value="选择4">选择4</option>
    </select>
</div>

css代码

.button {
    border: 1px solid #bbb;
    border-radius: 1px;
    box-shadow: 0 1px 0 1px rgba(0,0,0,.04);
    width: 300px;
    background: #f3f3f3;
    background: -moz-linear-gradient(top, #ffffff 0%, #e5e5e5 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#ffffff), color-stop(100%,#e5e5e5));
    background: -webkit-linear-gradient(top, #ffffff 0%,#e5e5e5 100%);
    background: -o-linear-gradient(top, #ffffff 0%,#e5e5e5 100%);
    background: -ms-linear-gradient(top, #ffffff 0%,#e5e5e5 100%);
    background: linear-gradient(to bottom, #ffffff 0%,#e5e5e5 100%);
}
/* --------------  */
/*  custom-select  */
/* --------------  */
.custom-select {
  position: relative;
}
.custom-select select {
  width:100%;
  margin:0;
  background:none;
  border: 1px solid transparent;
  outline: none;
  /* Prefixed box-sizing rules necessary for older browsers */
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  /* Remove select styling */
  appearance: none;
  -webkit-appearance: none;
  /* Font size must the 16px or larger to prevent iOS page zoom on focus */
  /* General select styles: change as needed */
  font-family: helvetica, sans-serif;
  font-weight: bold;
  color: #444;
  padding: .6em 1.9em .5em .8em;
  line-height:1.3;
}
.custom-select::after {
  content: "";
  position: absolute;
  width: 0px;
  height: 0px;
  top: 50%;
  right: 8px;
  margin-top:-4px;
  border:8px solid #929497;
  border-width: 8px 5px 8px;
  border-color: #929497 transparent transparent transparent;
  z-index: 2;
  pointer-events:none;
}
/* Hover style */
.custom-select:hover {
  border:1px solid #888;
}
/* Focus style */
.custom-select select:focus {
  outline:none;
  box-shadow: 0 0 1px 3px rgba(180,222,250, 1);
  background-color:transparent;
  color: #222;
  border:1px solid #aaa;
}
/* Set options to normal weight */
.custom-select option {
  font-weight:normal;
}
x:-o-prefocus, .custom-select::after {
  display:none;
}    
@media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {  
  .custom-select select::-ms-expand {
    display: none;
  }
  .custom-select select:focus::-ms-value {
    background: transparent;
    color: #222;
  }
}  
@-moz-document url-prefix() { 
  .custom-select {
    overflow: hidden;
  }
  .custom-select select {
    width: 120%;
    width: -moz-calc(100% + 3em);
    width: calc(100% + em);
  }
  
}
.custom-select select:-moz-focusring {
  color: transparent;
  text-shadow: 0 0 0 #000;
}

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