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<!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">
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
</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="0" my="0" style="display: inline-block">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 type="text/javascript">
$(function(){
$('.comment').on('keyup',function(){ //给多行文本域动态绑定一个鼠标事件
var len = $(this).val().length; //获取文本域输入的长度值
$(this).parents('.text-box').find('.length').text(140-len); //在同一个父级下面找到并改变可输入的字数
})
//点击回复按钮动态添加评论
$(document).on('click','.btn',function(){ //在当前文档中找到btn，动态绑定一个点击事件
var text_val = $(this).prev().val(); // 获取获取文本域的值
if(text_val == ''){ //验证是否有文字输入
alert('请输入内容');
}else{
//不为空就把评论的html内容块添加到当前评论的后面，其中内容日期为获取变量
//先获取日期时间
var date = new Date();
var time = date.getFullYear()+'-'+(date.getMonth()+1)+'-'+date.getDate()+' ';
time +=date.getHours()+':'+date.getMinutes()+':'+date.getSeconds();
//获取文本域内的内容
var str = $(this).prev().val();
var html = '<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>'+str+'</p><p class="comment-time">'+time+'<a href="javascript:;" class="comment-praise" total="0" my="0">赞</a><a href="javascript:;" class="comment-operate">删除</a></p></div></div>';
// 找到同一个父级下面的comment-list，在其后面添加html评论块
$(this).parents('.content').find('.comment-list').append(html);
//初始化文本域内容
$(this).parents('.text-box').find('.comment').val('');
//初始化可输入字数
$(this).parents('.text-box').find('.length').text('0');
//初始化输入框高度
$(this).prev().height(20);
//console.log(html);
}
})
//动态删除评论
$(document).on('click','.comment-operate',function(){
if(confirm('确定删除吗？')){
$(this).parents('.comment-box').remove();
}
})
//点击输入框改变高度
$('.comment').on('click',function(){
$(this).height(80);
})
//点赞+1
$(document).on('click','.comment-praise',function(){
var num = Number($(this).attr('total'))+1;
$(this).attr('total',num);
$(this).html(num+'赞');
console.log(num);
})
})
</script>
</body>
</html>点击 "运行实例" 按钮查看在线实例