jQuery实现简单弹出框

本文介绍: jQue ry 实现Pop over效果

功能点

1、点击“更多”出现弹出框

2、点击下拉列表触发回调

3、点击空白区域收起弹出框

效果演示

Popover demo

PS：鼠标右键效果图`另存为`到本地，再将图片后缀gif改为rar 即可得到完整代码压缩包。

实现思路

1、提前声明弹出标识做判断；

2、通过jQuery的ha s()、is()或其他类似方法判断点击的是弹出层以外的空白区域。

PS：太久不写jQuery了，很生疏了…

HTML

&lt;!DOCTYPE html&gt;
<html lang="en"&gt;

<head&gt;
    <meta charset="UTF-8"&gt;
    <meta http-equiv="X-UA-Compatible" content="IE=edge"&gt;
    <meta name="viewport" content="width=device-width, initial-scale=1.0"&gt;
    <title>Popover of Jquery</title>
    <link rel="stylesheet" href="./index.css">
</head>

<body>
    <div class="container">
        <!-- 弹出框html START -->
        <span class="popover-wrapper">
            <button class="reference" type="button">更多</button>
            <div class="popover">
                <input class="search" type="text" placeholder="搜索...">
                <ul class="unstyled list">
                    <li><a href="javascript:void(0);">示例选项1</a></li>
                    <li><a href="javascript:void(0);">示例选项2</a></li>
                    <li><a href="javascript:void(0);">示例选项3</a></li>
                    <li><a href="javascript:void(0);">示例选项4</a></li>
                    <li><a href="javascript:void(0);">示例选项5</a></li>
                </ul>
            </div>
        </span>
        <!-- 弹出框html END -->
        <div class="logs"></div>
    </div>
</body>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.3/jquery.min.js"></script>
<script src="./index.js"></script>

</html>

JS

//Popover plugin
(function ($) {

    //默认参数
    var defaults = {
        //触发器
        reference: '.reference',
        //弹出层
        popover: '.popover',
        //下拉列表
        dropdown: '.popover > .list',
        //回调函数
        callback: function () { }
    };

    /**
     * 构造函数
     * @param options 参数
     * @constructor
     */
    function Plugin(options) {
        this.options = $.extend({}, defaults, options || {});
        this.$reference = $(this.options.reference);
        if (!this.$reference.length) {
            return;
        }
        this.$popover = $(this.options.popover);
        if (!this.$popover.length) {
            return;
        }
        this.render();
    }

    Plugin.prototype = {
        /**
         * 渲染主方法
         */
        render: function () {
            this.$dropdown = $(this.options.dropdown);
            //标识声明
            this.popoverShow = false;
            //事件绑定
            this.bindEvent();
        },
        /**
         * 绑定事件
         */
        bindEvent: function () {
            this.bindPopoverShow();
            this.bindPopoverHide();
            this.bindDropdownClick();
        },
        bindPopoverShow: function () {
            var that = this;
            that.$reference.bind('click', function (e) {
                if (that.popoverShow) {
                    that.$popover.fadeOut();
                    that.popoverShow = false;
                } else {
                    that.$popover.fadeIn();
                    that.popoverShow = true;
                }
                //阻止冒泡，避免弹出时触发document点击
                e.stopPropagation();
            })
        },
        bindPopoverHide: function () {
            var that = this;
            $(document).bind("click", function (e) {
                if (that.popoverShow) {
                    if (
                        !that.$popover.is(e.target) &amp;&amp;
                        that.$popover.has(e.target).length === 0
                    ) {
                        that.$popover.fadeOut();
                        that.popoverShow = false;
                    }
                }
            });
        },
        bindDropdownClick: function () {
            var that = this;
            that.$dropdown.children().bind('click', function (e) {
                //关闭悬浮框
                that.$popover.fadeOut();
                that.popoverShow = false;
                //执行回调
                (typeof that.options.callback === 'function') &amp;&amp;
                    that.options.callback.call(this, "");
            })
        }
    };

    window.Popover = Plugin;

})(jQuery);

/**
 * 渲染入口
 * @param options
 * @returns {Plugin}
 */
new Popover({
    //触发器
    reference: '.reference',
    //弹出层
    popover: '.popover',
    //下拉列表
    dropdown: '.popover > .list',
    //回调函数
    callback: function () {
        $('.logs').append('<p>【' + $(this).text() + '】被选中了...</p>');
    }
});

CSS

button {
    background-color: #eee;
    font-weight: 300;
    font-size: 16px;
    font-family: "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
    text-decoration: none;
    text-align: center;
    line-height: 28px;
    height: 28px;
    padding: 0 16px;
    margin: 0;
    display: inline-block;
    appearance: none;
    cursor: pointer;
    border: none;
    box-sizing: border-box;
    transition: all .3s;
}

button:focus,
button:hover {
    background-color: #f6f6f6;
    text-decoration: none;
    outline: 0;
}

button:active {
    text-shadow: 0 1px 0 rgb(255 255 255 / 30%);
    text-decoration: none;
    background-color: #eee;
    border-color: #cfcfcf;
    color: #999;
    transition-duration: 0s;
    box-shadow: inset 0 1px 3px rgb(0 0 0 / 20%);
}

ul.unstyled {
    padding: 0;
    margin: 0;
    list-style: none;
}

ul.unstyled>li {
    list-style-type: none;
}

.popover-wrapper {
    position: relative;
}

.popover-wrapper .popover {
    padding: 8px;
    border: 1px solid #ebeef5;
    box-shadow: 0 2px 12px 0 rgb(0 0 0 / 10%);
    width: 150px;
    position: absolute;
    right: 0;
    top: 28px;
    margin-top: 4px;
    display: none;
}

.popover-wrapper .popover .search {
    -webkit-appearance: none;
    background-color: #fff;
    background-image: none;
    border-radius: 4px;
    border: 1px solid #dcdfe6;
    box-sizing: border-box;
    color: #606266;
    display: inline-block;
    font-size: inherit;
    height: 28px;
    line-height: 28px;
    outline: none;
    padding: 0 15px;
    transition: border-color .2s cubic-bezier(.645, .045, .355, 1);
    width: 100%;
}

.popover-wrapper .popover .list {
    margin-top: 4px;
}

.popover-wrapper .popover .list li a {
    display: block;
    padding: 4px 8px;
    text-decoration: none;
    color: #000;
    transition: all .3s;
}

.popover-wrapper .popover .list li a:hover,
.popover-wrapper .popover .list li a:focus {
    background: rgba(39, 174, 96, 0.2);
}

.popover-wrapper .popover .list li a:active {
    background: rgba(39, 174, 96, 0.8);
}

.logs {
    display: inline-block;
    vertical-align: text-top;
    width: 400px;
    padding: 8px;
    border: 1px solid;
    height: 400px;
    overflow: auto;
    margin-left: 16px;
}

.logs>p {
    margin: 0 0 8px;
}

.container {
    height: 600px;
    width: 600px;
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    margin: auto;
}