javascript实现评分功能

时间:2020-06-23 Jeslie-He 人气:1

本文着重为大家仔细讲解了javascript实现评分功能，文中代码实例讲解的非常细致，希望能够帮助到您，欢迎大家阅读和收藏

实现的效果如下：

具体代码如下：

html部分：

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <link rel="stylesheet" href="./index.css" rel="external nofollow" >

  <title>评分</title>
</head>

<body>
 <div id="starRating">
   <p class="photo">
    <span><i class="high"></i><i class="nohigh"></i></span>
    <span><i class="high"></i><i class="nohigh"></i></span>
    <span><i class="high"></i><i class="nohigh"></i></span>
    <span><i class="high"></i><i class="nohigh"></i></span>
    <span><i class="high"></i><i class="nohigh"></i></span>
   </p>
   <p class="starNum">0.0分</p>
   <div class="bottoms">
    <a class="garyBtn cancleStar">取消评分</a><a class="blueBtn sureStar">确认</a>
  </div>

 </div>
 <script src="./jquery.js"></script>
 <script src="./index.js"></script>

</body>

</html>

CSS部分：

#starRating .photo span{
  position: relative;
  display: inline-block;
  width: 44px;
  height: 42px;
  overflow: hidden;
  margin-right: 23px;
  cursor: pointer;
  /* border: 1px solid black; */
}
#starRating .photo span:last-child{
  margin-right: 0px;
}
#starRating .photo span .nohigh{
  position: absolute;
  width: 44px;
  height: 42px;
  top: 0;
  left: 0;
  background: url(./star.png);
}
#starRating .photo span .high {
  position: absolute;
  width: 44px;
  height: 42px;
  top: 0;
  left: 0;
  background: url(./star1.png);
}
#starRating .starNum {
  font-size: 26px;
  color: #de4414;
  margin-top: 4px;
  margin-bottom: 10px;
}
#starRating .photo{
  margin-top: 30px;
}
#starRating .bottoms a {
  margin-bottom: 0;
}
#starRating .bottoms .garyBtn {
  margin-right: 57px!important;
}
#starRating .bottoms a {
  width: 130px;
  height: 35px;
  line-height: 35px;
  border-radius: 3px;
  display: inline-block;
  font-size: 16px;
  transition: all 0.2s linear;
  margin: 16px 0 22px;
  text-align: center;
  cursor: pointer;
}
.garyBtn {
  margin-right: 60px!important;
  background-color: #e1e1e1;
  color: #999999;
}
.blueBtn {
  background-color: #1968b1;
  color: #fff;
}
.blueBtn:hover {
  background: #0e73d0;
}

index.js

$(function () {
  //评分
  var starRating = 0;
  //鼠标移入
  $('.photo span').on('mouseenter', function () {
    var index = $(this).index() + 1;
    $(this).prevAll().find('.high').css('z-index', 1);
    $(this).find('.high').css('z-index', 1);
    $(this).nextAll().find('.high').css('z-index', 0);
    $('.starNum').html((index * 2).toFixed(1) + '分');
  });
  //鼠标离开
  $('.photo').on('mouseleave', function () {
    $(this).find('.high').css('z-index', 0);
    var count = starRating / 2;
    console.log(count);
    if (count == 5) {
      $('.photo span').find('.high').css('z-index', 1);
    } else {
      $('.photo span').eq(count).prevAll().find('.high').css('z-index', 1);
    }
    $('.starNum').html(starRating.toFixed(1) + '分')
  }),
    //点击
    $('.photo span').on('click', function () {
      var index = $(this).index() + 1;
      $(this).prevAll().find('.high').css('z-index', 1)
      $(this).find('.high').css('z-index', 1);
      starRating = index * 2;
      $('.starNum').html(starRating.toFixed(1) + '分');
      //alert('评分：' + (starRating.toFixed(1) + '分'))
    });
    //取消评分
    $('.cancleStar').on('click',function () {
      starRating = 0;
      $('.photo span').find('.high').css('z-index',0);
      $('.starNum').html(starRating.toFixed(1)+'分');
    });
    //确定评分
    $('.sureStar').on('click',function () {
      if(starRating===0) {
        alert('最低一颗星！');
      } else {
        alert('评分：'+(starRating.toFixed(1)+'分'))
      }
    })
})

图片stat.png和stat1.png分别如下

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