jq多条件搜索展开收起代码

今天实现的效果是点击展开按钮展示更多搜索条件，点击收起只显示一行搜索条件，这也是我最近项目中用到的。

该代码适用于搜索条件比较多，界面布局又比较有限，默认收起只留下一行搜索条件，展开之后再进行更多搜索。

HTML 代码

<ul class="search-ul">
    <li class="clearfix">
        <label>时间：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>地点：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>人物：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>情景：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>时间：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>地点：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>人物：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>

    <li class="clearfix">
        <label>情景：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>人物：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="clearfix">
        <label>情景：</label>
        <div class="search-box">
            <input type="text">
        </div>
    </li>
    <li class="search-li clearfix">
        <span class="open">展开<i>&gt;</i></span>
        <button class="reset">重置</button>
        <button class="search">查询</button>
    </li>
</ul>

CSS 代码

[rem="1920"] {
    font-size: 5.2083333333vw
}
[rem="750"] {
    font-size: 13.333333333vw
}

* {
    -webkit-tap-highlight-color: transparent
}

html {
    -webkit-text-size-adjust: 100%
}

body {
    margin: 0;
    font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
    font-size: 16px
}

figure,p {
    margin: 0
}

h1,h2,h3,h4,h5,h6 {
    margin: 0;
    padding: 0;
    font-weight: 400
}

dd,dl,dt,li,ol,ul {
    margin: 0;
    padding: 0;
    list-style: none
}

a {
    background-color: transparent;
    text-decoration: none
}

img {
    border: 0
}

table {
    border-collapse: collapse;
    border-spacing: 0
}

td,th {
    padding: 0
}

button,input,select,textarea {
    color: inherit;
    font: inherit;
    margin: 0;
    padding: 0;
    outline: none;
}

textarea {
    overflow: auto
}

article,aside,figcaption,figure,footer,header,hgroup,main,nav,section {
    display: block
}

template {
    display: none
}

.hidden2,.hidden3,.hidden4,.hidden5 {
    display: -webkit-box;
	/* autoprefixer:off */
    -webkit-box-orient: vertical;
    overflow: hidden
}

.hidden1 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap
}

.hidden2 {
    -webkit-line-clamp: 2
}

.hidden3 {
    -webkit-line-clamp: 3
}

.hidden4 {
    -webkit-line-clamp: 4
}

.hidden5 {
    -webkit-line-clamp: 5
}

.clearfix::after,.clearfix::before {
    content: "";
    width: 0;
    height: 0;
    display: block;
    clear: both
}

.search-ul {
    width: 1000px;
    margin: 0 auto;
}

.search-ul li {
    float: left;
    width: 25%;
    margin-top: 20px;
}

.search-ul li label {
    float: left;
    width: 40%;
    height: 30px;
    line-height: 30px;
    text-align: right;
}

.search-ul li .search-box {
    float: left;
    width: 60%;
}

.search-ul li .search-box input {
    width: 100%;
    height: 28px;
    line-height: 28px;
    border: 1px solid #ececec;
}

.search-ul li button {
    float: right;
    width: 60px;
    height: 30px;
    line-height: 30px;
    text-align: center;
}

.search-ul li.search-li {
    float: right;
    cursor: pointer;
}

.search-li span {
    float: right;
    color: skyblue;
    margin-left: 15px;
    display: block;
    width: 60px;
    height: 30px;
    line-height: 30px;
}

.search {
    background: skyblue;
    color: #FFFFFF;
    border: none;
}

.reset {
    border: 1px solid #cccccc!important;
    color: #cccccc;
    background: #fff;
    margin-left: 15px;
}

.search-li .open i {
    display: inline-block;
    transform: rotate(90deg);
    -ms-transform: rotate(90deg);
	/* IE 9 */
    -moz-transform: rotate(90deg);
	/* Firefox */
    -webkit-transform: rotate(90deg);
	/* Safari 和 Chrome */
    -o-transform: rotate(90deg);
	/* Opera */
}

JS 代码

var len = $(".search-ul li").length;
$(".search-ul li").filter(":lt(3)").show().end().filter(":gt(2)").hide();
$(".search-li").show();

//展开
var searchFlag = true;
$(document).on('click', ".open",
function() {
    if (searchFlag == true) { //展开
        $(".search-ul li").show();
        $(".open").html("收起>");
        $(".open i").css('transform', 'rotate(-90deg)');
        searchFlag = false;
    } else {
        $(".open").html("展开>");
        $(".open i").css('transform', 'rotate(90deg)');
        if (len - 1 > 3) {
            $(".search-ul li").filter(":lt(3)").show().end().filter(":gt(2)").hide();
            $(".search-li").show();
        } else {
            $(".search-ul li").show();
        }
        searchFlag = true;
    }
})

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