js实现五星评价功能

效果图：

代码如下：

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>五星评价</title>
  <style>
    @font-face {
      font-family: 'iconfont'; /* project id 247957 */
      src: url('//at.alicdn.com/t/font_wkv6intmx8cnxw29.eot');
      src: url('//at.alicdn.com/t/font_wkv6intmx8cnxw29.eot?#iefix') format('embedded-opentype'),
      url('//at.alicdn.com/t/font_wkv6intmx8cnxw29.woff') format('woff'),
      url('//at.alicdn.com/t/font_wkv6intmx8cnxw29.ttf') format('truetype'),
      url('//at.alicdn.com/t/font_wkv6intmx8cnxw29.svg#iconfont') format('svg');
    }
    .iconfont {
      font-family:"iconfont" !important;
      font-size:16px;
      font-style:normal;
      -webkit-font-smoothing: antialiased;
      -webkit-text-stroke-width: 0.2px;
      -moz-osx-font-smoothing: grayscale;
    }
    body{
      font-family: "microsoft yahei";
    }
    ul,li{
      list-style: none;
      padding:0;
      margin:0;
    }
    a{
      text-decoration: none;
    }
    .clearfix:after {
      content: ".";
      display: block;
      height: 0;
      clear: both;
      visibility: hidden;
    }
    .order-evaluation {
      width: 827px;
      border: 2px solid #E84E40;
      background: #fff;
      z-index: 200;
      margin:50px auto;
    }
    .order-evaluation{
      padding:22px;
    }
    .order-evaluation h4{
      font-size:18px;
      color:#333333;
      padding-bottom:20px;
      border-bottom:1px dashed #dbdbdb;
    }
    .order-evaluation p{
      font-size:14px;
      color:#999;
      line-height:45px;
      margin-bottom:0;
    }
    .order-evaluation .order-evaluation-text{
      font-size:16px;
      color:#333;
      line-height:40px;
      width:809px;
      padding-left:15px;
      background:#f3f3f3;
      margin-bottom:25px;
      margin-top:20px;
    }
    .order-evaluation-checkbox ul li{
      width:142px;
      height:43px;
      border:1px solid #e8e8e8;
      text-align: center;
      background: #fff;
      font-size:14px;
      color:#333333;
      line-height:43px;
      margin-right:25px;
      margin-bottom:25px;
      float:left;
      cursor: pointer;
      overflow: hidden;
      position:relative;
    }
    .order-evaluation-checkbox ul li.checked i{
      display: block;
    }
    .order-evaluation-checkbox ul li.checked{
      border:1px solid #e84c3d;
    }
    .order-evaluation .order-evaluation-textarea{
      position:relative;
      width: 784px;
      height: 210px;
    }
    .order-evaluation .order-evaluation-textarea textarea{
      width:793px;
      height:178px;
      border:1px solid #e8e8e8;
      position:absolute;
      top:0;
      left:0;
      line-height:22px;
      padding:15px;
      color:#666;
    }
    .order-evaluation .order-evaluation-textarea span{
      position:absolute;
      bottom:10px;
      font-size:12px;
      color:#999;
      right:10px;
    }
    .order-evaluation .order-evaluation-textarea span em{
      color:#e84c3d;
    }
    .order-evaluation>a{
      width:154px;
      height:48px;
      border-radius: 6px;
      display: block;
      text-align: center;
      line-height:48px;
      background:#f36a5a;
      float:right;
      margin-top:20px;
      color:#fff;
      font-size:14px;
    }
    .order-evaluation-checkbox ul li i {
      display: none;
      color: #e84c3d;
      position: absolute;
      right: -4px;
      bottom: -14px;
      font-size: 20px;
    }
    .order-evaluation>a:hover{
      background: #e84c3d;
    }
    .block li label,.con span{ font-size: 18px; margin-right: 20px; line-height: 23px;}
    .block li span{display: inline-block; vertical-align: middle; cursor: pointer;}
    .block li span img{margin-right: -5px; }
    .level{color:#e84c3d;font-size:16px;margin-left:15px;position: relative;top: 3px;}
    .dmlei_tishi_info{
      height:70px;border-radius: 10px;background: rgba(0,0,0,0.5);font-size:18px;color:#fff;text-align: center;line-height: 70px;position:fixed;
      left: 48%;
      display: none;
      margin-left: -128px;
      top: 40%;
      margin-top: -35px;
      padding: 0 15px;
      z-index: 1000;
    }
  </style>
</head>
<body>
<div class="order-evaluation clearfix">
  <h4>给“新闻订单”的评价</h4>
  <p>请严肃认真对待此次评价哦！您的评价对我们真的真的非常重要！</p>
  <div class="block">
    <ul>
      <li data-default-index="0">
            <span>
              <img src="http://7xnlea.com2.z0.glb.qiniucdn.com/x1.png">
              <img src="http://7xnlea.com2.z0.glb.qiniucdn.com/x1.png">
              <img src="http://7xnlea.com2.z0.glb.qiniucdn.com/x1.png">
              <img src="http://7xnlea.com2.z0.glb.qiniucdn.com/x1.png">
              <img src="http://7xnlea.com2.z0.glb.qiniucdn.com/x1.png">
            </span>
        <em class="level"></em>
      </li>
    </ul>
  </div>
  <div class="order-evaluation-text">
    本次交易，乖，摸摸头 给您留下了什么印象呢？
  </div>
  <div class="order-evaluation-checkbox">
    <ul class="clearfix">
      <li class="order-evaluation-check" data-impression="1">专业水平高<i class="iconfont icon-checked"></i></li>
      <li class="order-evaluation-check" data-impression="2">交付准时<i class="iconfont icon-checked"></i></li>
      <li class="order-evaluation-check" data-impression="3">效果明显<i class="iconfont icon-checked"></i></li>
      <li class="order-evaluation-check" data-impression="4">数据分析准确<i class="iconfont icon-checked"></i></li>
      <li class="order-evaluation-check" data-impression="5">能力待提高<i class="iconfont icon-checked"></i></li>
      <li class="order-evaluation-check" data-impression="6">工期延误<i class="iconfont icon-checked"></i></li>
    </ul>
  </div>
  <div class="order-evaluation-textarea">
    <textarea name="content" id="TextArea1" onkeyup="words_deal();" ></textarea>
    <span>还可以输入<em id="textCount">140</em>个字</span>
  </div>
  <a href="javascript:;" rel="external nofollow" id="order_evaluation">评价完成</a>
</div>
<div id="order_evaluate_modal" class="dmlei_tishi_info"></div>
</body>
<script src="https://cdn.bootcss.com/jquery/3.1.1/jquery.min.js"></script>
<script>
  /*
   * 根据index获取 str
   * **/
  function byIndexLeve(index){
    var str ="";
    switch (index)
    {
      case 0:
        str="差评";
        break;
      case 1:
        str="较差";
        break;
      case 2:
        str="中等";
        break;
      case 3:
        str="一般";
        break;
      case 4:
        str="好评";
        break;
    }
    return str;
  }
  // 星星数量
  var stars = [
['x2.png', 'x1.png', 'x1.png', 'x1.png', 'x1.png'],
    ['x2.png', 'x2.png', 'x1.png', 'x1.png', 'x1.png'],
    ['x2.png', 'x2.png', 'x2.png', 'x1.png', 'x1.png'],
    ['x2.png', 'x2.png', 'x2.png', 'x2.png', 'x1.png'],
    ['x2.png', 'x2.png', 'x2.png', 'x2.png', 'x2.png'],
  ];
  $(".block li").find("img").hover(function(e) {
    var obj = $(this);
    var index = obj.index();
    if(index < (parseInt($(".block li").attr("data-default-index")) -1)){
      return ;
    }
    var li = obj.closest("li");
    var star_area_index = li.index();
    for (var i = 0; i < 5; i++) {
      li.find("img").eq(i).attr("src", "http://7xnlea.com2.z0.glb.qiniucdn.com/" + stars[index][i]);//切换每个星星
    }
    $(".level").html(byIndexLeve(index));
  }, function() {
  })
  $(".block li").hover(function(e) {
  }, function() {
    var index = $(this).attr("data-default-index");//点击后的索引
    index = parseInt(index);
    console.log("index",index);
    $(".level").html(byIndexLeve(index-1));
    console.log(byIndexLeve(index-1));
    $(".order-evaluation ul li:eq(0)").find("img").attr("src","http://7xnlea.com2.z0.glb.qiniucdn.com/x1.png");
    for (var i=0;i<index;i++){
      $(".order-evaluation ul li:eq(0)").find("img").eq(i).attr("src","http://7xnlea.com2.z0.glb.qiniucdn.com/x2.png");
    }
  })
  $(".block li").find("img").click(function() {
    var obj = $(this);
    var li = obj.closest("li");
    var star_area_index = li.index();
    var index1 = obj.index();
    li.attr("data-default-index", (parseInt(index1)+1));
    var index = $(".block li").attr("data-default-index");//点击后的索引
    index = parseInt(index);
    console.log("index",index);
    $(".level").html(byIndexLeve(index-1));
    console.log(byIndexLeve(index-1));
    $(".order-evaluation ul li:eq(0)").find("img").attr("src","http://7xnlea.com2.z0.glb.qiniucdn.com/x1.png");
    for (var i=0;i<index;i++){
      $(".order-evaluation ul li:eq(0)").find("img").eq(i).attr("src","http://7xnlea.com2.z0.glb.qiniucdn.com/x2.png");
    }
  });
  //印象
  $(".order-evaluation-check").click(function(){
    if($(this).hasClass('checked')){
      //当前为选中状态，需要取消
      $(this).removeClass('checked');
    }else{
      //当前未选中，需要增加选中
      $(this).addClass('checked');
    }
  });
  //评价字数限制
  function words_deal()
  {
    var curLength=$("#TextArea1").val().length;
    if(curLength>140)
    {
      var num=$("#TextArea1").val().substr(0,140);
      $("#TextArea1").val(num);
      alert("超过字数限制，多出的字将被截断！" );
    }
    else
    {
      $("#textCount").text(140-$("#TextArea1").val().length);
    }
  }
  $("#order_evaluation").click(function(){
    $("#order_evaluate_modal").html("感谢您的评价！么么哒(* ￣3)(ε￣ *)").show().delay(3000).hide(500);
  })
</script>
</html>

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