实例
<!DOCTYPE html>
<html>
<head>
<title>评论功能练习</title>
<meta charset="utf-8">
<link rel="icon" type="image/x-icon" href="static/images/logo.png">
<link rel="stylesheet" type="text/css" href="static/style.css">
</head>
<body>
<div id="list">
<div class="box clearfix">
<!-- 删除说说按钮 close-->
<a class="close" href="javascript:;">×</a>
<img class="head" src="static/images/1.png" alt="">
<div class="content">
<div class="main">
<p class="txt">
<span class="user">西门大官人: </span>
~ All the luck is for you. ~
</p>
<img class="pic" src="static/images/img1.jpg" alt="">
</div>
<div class="info clearfix">
<span class="time">02-14 23:01</span>
<!-- 给说说点赞 praise -->
<a class="praise" href="javascript:;">赞</a>
</div>
<div class="praises-total" total="4" style="display: block;">4个人觉得很赞</div>
<!--评论内容-->
<div class="comment-list">
<!-- 每次评论要添加的内容跟标签 -->
<div class="comment-box clearfix" user="self">
<img class="myhead" src="static/images/4.jpg" alt="">
<div class="comment-content">
<p class="comment-text"><span class="user">我:</span>你说的都对……</p>
<p class="comment-time">
2019-01-19 14:36
<a href="javascript:;" class="comment-praise" total="1" my="0" style="display: inline-block">1赞</a>
<a href="javascript:;" class="comment-operate">删除</a>
</p>
</div>
</div>
<!--添加结束-->
</div>
<!--评论内容结束-->
<div class="text-box">
<textarea class="comment" placeholder="评论…"></textarea>
<button class="btn">回 复</button>
<span class="word"><span class="length">0</span>/140</span>
</div>
</div>
</div>
<div class="box clearfix">
<a class="close" href="javascript:;">×</a>
<img class="head" src="static/images/2.jpg" alt="" />
<div class="content">
<div class="main">
<p class="txt">
<span class="user">欧阳克 : </span>三亚的海滩很漂亮。
</p>
<img class="pic" src="static/images/img5.jpg" alt="" />
</div>
<div class="info clearfix">
<span class="time">02-14 23:01</span>
<a class="praise" href="javascript:;">赞</a>
</div>
<div class="praises-total" total="0" style="display: none;"></div>
<div class="comment-list">
<div class="comment-box clearfix" user="other">
<img class="myhead" src="static/images/3.png" alt="">
<div class="comment-content">
<p class="comment-text"><span class="user">韦小宝：</span>我也想去三亚。</p>
<p class="comment-time">
2019-01-19 14:36
<a href="javascript:;" class="comment-praise" total="0" my="0">赞</a>
<a href="javascript:;" class="comment-operate">删除</a>
</p>
</div>
</div>
</div>
<div class="text-box">
<textarea class="comment" placeholder="评论…"></textarea>
<button class="btn">回 复</button>
<span class="word"><span class="length">0</span>/140</span>
</div>
</div>
</div>
</div>
<script src="jquery-3.3.1.js"></script>
<script>
$(function() {
// on() 方法可以在被选元素及子元素上添加一个或多个事件处理程序; 绑定事件 动态绑定
$('.comment').on('keyup', function() {
var len = $(this).val().length //文本框里面的信息内容字符的长度
$(this).parents('.text-box').find('.length').text(140 - len);
})
$(document).on('click', '.btn', function() {
// 遍历方法 prev()获得元素紧邻前一个同胞元素
var val = $(this).prev().val() //文本框里面的信息内容
if (val == '') {
alert('留言内容不能为空！')
} else {
var date = new Date()
var yy = date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + date.getDate() + ' ' + date.getHours() + ":" + date.getMinutes() + ':' + date.getSeconds()
var html = '<div class="comment-box clearfix" user="self"><img class="myhead" src="static/images/4.jpg" alt=""><div class="comment-content"><p class="comment-text"><span class="user">我:</span>' + val +
'</p><p class="comment-time">' + yy + '<a href="javascript:;" class="comment-praise" total="1" my="0" style="display: inline-block">1赞</a><a href="javascript:;" class="comment-operate">删除</a></p></div></div>'
$(this).parents('.box').find('.comment-list').append(html) //添加评论
$(this).parents('.box').find('.comment').val('') //清空输入框
$(this).parents('.box').find('.length').text('0')
$(this).prev().height(20)
}
})
$('.comment').click(function() {
$(this).height(80)
})
//点赞功能
// 给说说点赞
$('.praise').on('click', function() {
$(this).attr('class', 'praise_2')
})
//给评论点赞
$(document).on('click', '.comment-praise', function() {
var num = parseInt($(this).attr('total')) + 1 //每次增加一个赞
$(this).attr('total', num)
$(this).html(num + '赞')
})
$(document).on('click', '.comment-operate', function() {
if (confirm('确定删除么？')) {
$(this).parents('.comment-box').remove()
}
})
$(document).on('click', '.close', function() {
if (confirm('确定删除么？')) {
$(this).parents('box').remove()
}
})
})
</script>
</body>
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