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基于JavaScript實現(xiàn)評論框展開和隱藏功能

 更新時間：2017年08月25日 10:38:17   作者：qq_36354609  
本文通過實例代碼給大家介紹了基于JavaScript實現(xiàn)評論框展開和隱藏功能，感興趣的朋友參考下吧

1.效果圖如下所示，

點擊評論會在對應(yīng)的評論區(qū)域展開評論輸入框，點擊取消會取消對應(yīng)的評論輸入框

2.html代碼：需要引入jQuery.js

<div
class="nr-comment">
<div
class="nr-comment-con">
<div
class="nr-comment-nav">
<div
class="comment-number">
<span>493</span>
<span>條評論</span>
</div>
<div
class="comment-sort">
切換為時間排序
</div>
</div>
<div
class="comment-content">
<div
class="com-users">
<div
class="comment-user">
<span>知乎用戶</span>
<div
class="comment-user-content">
這個爬蟲真的好強(qiáng)大！
</div>
</div>
<div
class="comment-time">
<div>2017.10.01 21:32:30</div>
<button
class="btn btn-primary btn-sm btn-reply">回復(fù)</button>
</div>
</div>
<div
class="user-reply">
<duv
class="reply-in">
<input
type="text"
value=""
name=""
placeholder="請輸入評論內(nèi)容" />
</duv>
<div
class="reply-buttons">
<button
type="button"
class="btn btn-primary btn-comment btn-sm">評論</button>
<button
type="button"
class="btn btn-default btn-cancel btn-sm">取消</button>
</div>
</div>
</div>
<div
class="comment-content">
<div
class="com-users">
<div
class="comment-user">
<span>知乎用戶</span>
<div
class="comment-user-content">
這個爬蟲真的好強(qiáng)大！
</div>
</div>
<div
class="comment-time">
<div>2017.10.01 21:32:30</div>
<button
class="btn btn-primary btn-sm btn-reply">回復(fù)</button>
</div>
</div>
<div
class="user-reply">
<duv
class="reply-in">
<input
type="text"
value=""
name=""
placeholder="請輸入評論內(nèi)容" />
</duv>
<div
class="reply-buttons">
<button
type="button"
class="btn btn-primary btn-comment btn-sm">評論</button>
<button
type="button"
class="btn btn-default btn-cancel btn-sm">取消</button>
</div>
</div>
</div>
<div
class="comment-content">
<div
class="com-users">
<div
class="comment-user">
<span>知乎用戶</span>
<div
class="comment-user-content">
這個爬蟲真的好強(qiáng)大！
</div>
</div>
<div
class="comment-time">
<div>2017.10.01 21:32:30</div>
<button
class="btn btn-primary btn-sm btn-reply">回復(fù)</button>
</div>
</div>
<div
class="user-reply">
<duv
class="reply-in">
<input
type="text"
value=""
name=""
placeholder="請輸入評論內(nèi)容" />
</duv>
<div
class="reply-buttons">
<button
type="button"
class="btn btn-primary btn-comment btn-sm">評論</button>
<button
type="button"
class="btn btn-default btn-cancel btn-sm">取消</button>
</div>
</div>
</div>
<div
class="comment-content">
<div
class="com-users">
<div
class="comment-user">
<span>知乎用戶</span>
<div
class="comment-user-content">
這個爬蟲真的好強(qiáng)大！
</div>
</div>
<div
class="comment-time">
<div>2017.10.01 21:32:30</div>
<button
class="btn btn-primary btn-sm btn-reply">回復(fù)</button>
</div>
</div>
<div
class="user-reply">
<duv
class="reply-in">
<input
type="text"
value=""
name=""
placeholder="請輸入評論內(nèi)容" />
</duv>
<div
class="reply-buttons">
<button
type="button"
class="btn btn-primary btn-sm btn-comment">評論</button>
<button
type="button"
class="btn btn-default btn-sm btn-cancel">取消</button>
</div>
</div>
</div>
<div
class="comment-ipt">
<input
type="text"
placeholder="輸入你的評論">
<button
type="submit"
class="btn btn-sm btn-primary">評論</button>
</div>
</div>
</div>

3.css樣式代碼，樣式無所謂，自己寫就可以。

.nr-comment {
width:
100%;
border-right:
1px 
solid #A9A9A9;
border-left:
1px 
solid #A9A9A9;
}
.nr-comment .nr-comment-con {
width:
100%;
}
.nr-comment .nr-comment-con .nr-comment-nav {
width:
100%;
height:
40px;
border-bottom:
1px 
solid #F5F5F6;
border-right:
1px 
solid #A9A9A9;
border-left:
1px 
solid #A9A9A9;
background-color:
#1E8CE0;
}
.nr-comment .nr-comment-con .nr-comment-nav .comment-number {
float:
left;
width:
85px;
height:
30px;
text-align:
center;
margin-top:
5px;
color:
white;
line-height:
2.3em;
}
.nr-comment .nr-comment-con .nr-comment-nav .comment-sort {
float:
right;
width:
110px;
height:
30px;
margin-top:
5px;
margin-right:
10px;
line-height:
2em;
color:
white;
}
.nr-comment .nr-comment-con .comment-content {
width:
100%;
margin-top:
10px;
border-bottom:
1px 
solid #a9a9a9;
}
.nr-comment .nr-comment-con .comment-content .com-users {
width:
100%;
min-height:
60px;
}
.nr-comment .nr-comment-con .comment-content .com-users .comment-user {
float:
left;
width:
500px;
height:
60px;
}
.nr-comment .nr-comment-con .comment-content .com-users .comment-user span {
color:
black;
margin-left:
10px;
}
.nr-comment .nr-comment-con .comment-content .com-users .comment-user .comment-user-content {
width:
90%;
height:
60px;
margin-left:
10px;
}
.nr-comment .nr-comment-con .comment-content .com-users .comment-time {
float:
right;
width:
190px;
height:
60px;
text-align:
center;
color:
#9CADC6;
font-size:
0.9em;
text-align:
right;
}
.nr-comment .nr-comment-con .comment-content .com-users .comment-time div {
margin-right:
15px;
}
.nr-comment .nr-comment-con .comment-content .com-users .comment-time .btn-reply {
margin-top:
5px;
border-radius:
4px;
border:
none;
background-color:
#1BB394;
color:
white;
margin-right:
15px;
}
.nr-comment .nr-comment-con .comment-content .user-reply {
display:
none;
width:
100%;
height:
50px;
}
.nr-comment .nr-comment-con .comment-content .user-reply .reply-in {
float:
left;
width:
85%;
height:
50px;
}
.nr-comment .nr-comment-con .comment-content .user-reply .reply-in input {
width:
100%;
height:
30px;
margin-top:
10px;
margin-left:
10px;
}
.nr-comment .nr-comment-con .comment-content .user-reply .reply-buttons {
float:
right;
margin-top:
10px;
}
.nr-comment .nr-comment-con .comment-content .user-reply .reply-buttons .btn-comment {
float:
right;
margin-right:
14px;
background-color:
#1BB394;
border:
none;
color:
white;
}
.nr-comment .nr-comment-con .comment-content .user-reply .reply-buttons .btn-cancel {
float:
right;
margin-right:
10px;
}
.nr-comment .nr-comment-con .comment-ipt {
width:
100%;
height:
40px;
border-bottom:
1px 
solid #A9A9A9;
margin-top:
10px;
}
.nr-comment .nr-comment-con .comment-ipt input {
display:
block;
width:
92%;
height:
30px;
float:
left;
font-size:
14px;
margin-left:
10px;
}
.nr-comment .nr-comment-con .comment-ipt button {
display:
block;
float:
right;
background-color:
#1BB394;
color:
white;
margin-right:
13px;
border:
none;
}

4.js控制對應(yīng)評論按鈕事件。

<script>
$(document).ready(function()
 {
$('.btn-reply').click(function()
 {
// console.log($(this).index());
// 獲取回復(fù)按鈕集合,getElementByClassName;
var m
= document.getElementsByClassName("btn-reply");
var n
= document.getElementsByClassName("user-reply");
console.log('回復(fù)按鈕集合'
+ m);
// 獲取回復(fù)按鈕的索引
var index
= $(".btn-reply").index($(this));
console.log(index);
$(".user-reply").eq(index).css("display",
"block");
});
$('.btn-cancel').click(function()
 {
var m
= document.getElementsByClassName("btn-reply");
var n
= document.getElementsByClassName("user-reply");
var index
= $(".btn-cancel").index($(this));
console.log(index);
$(".user-reply").eq(index).css("display",
"none");
});
});
</script>

總結(jié)

以上所述是小編給大家介紹的基于JavaScript實現(xiàn)評論框展開和隱藏功能，希望對大家有所幫助，如果大家有任何疑問請給我留言，小編會及時回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持！

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