点赞功能实现 $(tag).css('属性', '样式')

1. 创建标签 document.createElement()

2.$(tag).css('属性'，样式) 赋予标签属性样式

3.设置定时器改变位置大小

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .container{
            padding: 50px;
            border: 1px solid #eeeeee;

        }
        .item{

            cursor: pointer;
               position: relative;
            width: 30px;
        }


    </style>
</head>
<body>
    <div class="container">
        <div class="item">
            <span>赞</span>
        </div>
    </div>
    <div class="container">
        <div class="item">
            <span>赞</span>
        </div>
    </div>
    <div class="container">
        <div class="item">
            <span>赞</span>
        </div>
    </div>
<script src="../jquery-2.12.4.js"></script>
<script>
    $('.item').click(function () {
         add1Element(this);
        function add1Element(self) {
            var right = 0;
            var top = 0;
            var fontSize = 15;
            var opacity = 1;
            var tag=document.createElement('span');
            tag.innerText = '+1';
            $(tag).css('position', 'absolute');
            $(tag).css('color', 'green');
            $(tag).css('right', right+'px');
            $(tag).css('top', top+'px');
            $(tag).css('fontSize',fontSize+'px' );
            $(tag).css('opacity', opacity);
            $(self).append(tag);
            var obj=setInterval(function (){
            right = right-5;
            top = top-5;
            fontSize = fontSize+5;
            opacity = opacity-0.1;
            $(tag).css('right', right+'px');
            $(tag).css('top', top+'px');
            $(tag).css('fontSize',fontSize+'px' );
            $(tag).css('opacity', opacity);
            if(opacity<0){
                clearInterval(obj)
            }
            }, 80)

        }
    })
</script>
</body>
</html>

等属性

posted on 2018-07-14 17:45 python我的最爱阅读(281) 评论(0) 编辑收藏举报