你信不信,只要学几天javascript就可以使用纯原生实现五星评分效果【附完整代码】

news2024/12/23 3:29:15

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效果展示

图片素材

HTML代码

<div id="star">
    <h5>点击星星就能打分</h5>
    <ul>
        <li class="active"><a href="javascript:;"></a></li>
        <li><a href="javascript:;"></a></li>
        <li><a href="javascript:;"></a></li>
        <li><a href="javascript:;"></a></li>
        <li><a href="javascript:;"></a></li>
    </ul>
    <p>显示文字信息:<span></span></p>
</div>

CSS代码

* {
    margin: 0;
    padding: 0;
}

body {
    color: #666;
    font-size: 12px;
    font-family: '微软雅黑';
}

ul {
    list-style-type: none;
}

#star {
    position: relative;
    width: 400px;
    margin: 100px auto;
    border: 1px solid red;
    border-radius: 10px;
    padding: 30px;
}

#star h5 {
    width: 100px;
    margin: 0 auto;
    line-height: 19px;
    text-align: center;
}

#star ul {
    margin: 20px 20px;
    border: 1px saddlebrown solid;
    overflow: hidden;
    padding: 10px;
}

#star ul li {
    float: left;
    width: 27px;
    height: 27px;
    cursor: pointer;
    background: url("img/star.gif") no-repeat;
}

#star li.active {
    background-position: 0 -29px;
}

#star>p{
    border: 1px solid red;
    width: 200px;
    margin: 0 auto;
    padding: 10px;
}
#star>p>span{
    color: red;
}

javascript 代码

window.onload = function () {


    var oStar = document.getElementById("star");

    var oLi = oStar.getElementsByTagName("li");

    var oUl = oStar.getElementsByTagName("ul")[0];

    var oP = oStar.getElementsByTagName("p")[0];
    var oSpan = oP.getElementsByTagName("span")[0];

    var iScore = iStar = 0;

    var message = ['很不满意', '不满意', '一般', '满意', '非常满意'];
    var index=0;

    var onoff=false;
    for (var i = 0; i < oLi.length; i++) {
        oLi[i].index = i;
        oLi[i].onmousemove = function () {
            oSpan.innerHTML=message[this.index];
            _showStar(this.index);
        }
        oLi[i].onmouseout = function () {
            if(onoff==false){
                oSpan.innerHTML="默认";
            }
            _showStar();
        }

        oLi[i].onclick = function () {
            iStar = this.index;
            index = this.index;  
            onoff=true;
            if(onoff==true){
                oSpan.innerHTML=message[this.index];
            }
        }

    }

    oUl.onmouseout=function (){
        oSpan.innerHTML=message[index];
    }

    function _showStar(_index) {
        iScore = _index+1 || iStar+1
        for (var i = 0; i < oLi.length; i++) {
            if(i<iScore){
                oLi[i].className='active';
            }else{
                oLi[i].className='';
            }
        }
    }

}