模态框：JavaScript+css

本文主要是介绍模态框：JavaScript+css，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

solution one：

JavaScript，单个模态框展示：

modal_tools.js

window.onload = function () {  //js默认加载页面方法
    // get modal show or close element value
    let toggleModal = document.getElementsByClassName("toggleModal");
    let container = document.getElementsByClassName("container")[0];
    let mask = document.getElementsByClassName("mask")[0];
    let modal = document.getElementsByClassName("modal")[0];
    let closes = document.getElementsByClassName("close")[0];
    for (let modal_index = 0; modal_index < toggleModal.length; modal_index++) {
        toggleModal[modal_index].onclick = show;
    }
    closes.onclick = close;

    function show() {
        let index = this.id;
        //show edit modal value
        update_modal_value(index);  //这里展示的编辑功能的模态框，所以模态框展示的时候，会携带被编辑的数据，
// 这个功能是在展示模态框的地方添加的
        mask.style.display = "block";
        modal.style.display = "block";
    }

    function close() {
        mask.style.display = "none";
        modal.style.display = "none";
    }
};

//edit modal table value
function update_modal_value(index){
    let modal_id = document.getElementById("record_id");
    let org_id = document.getElementsByClassName("record_id")[index];
    modal_id.innerText = org_id.innerText;
    let org_name = document.getElementsByClassName("person_name")[index];
    let modal_name = document.getElementById("person_name");
    for (let name_id=0;name_id<modal_name.length;name_id++){
        if(modal_name[name_id].innerText===org_name.innerText){
            modal_name[name_id].selected = true;
        }
    }
    get_selected_attend("morning", "morning", index);
    get_selected_attend("afternoon", "afternoon", index);
    let org_date = document.getElementsByClassName("attend_date")[index];
    let modal_date = document.getElementById("attend_date");
    modal_date.value = org_date.innerText;
    console.log("modal value>>", modal_date.value, "org date>>", org_date.innerText);
}

//set selected option value
function get_selected_attend(class_name, id_name, index){
    let org_morning = document.getElementsByClassName(class_name)[index];
    let modal_morning = document.getElementById(id_name);
    for (let name_id=0;name_id<modal_morning.length;name_id++){
        if(modal_morning[name_id].innerText===org_morning.innerText){
            modal_morning[name_id].selected = true;
        }
    }
}

css，单个模态框展示，跟上面衔接：

org_modal_frame_back.css

* {
    padding: 0;
    margin: 0;
}

body {
    width: 100%;
    height: 100%;
    background: #fff;
}

.mask {
        position: fixed;  
/*所有position的value都是fixed，这样页面上下滑动的时候，模态框能一直覆盖掉整个页面*/
        top: 0;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.4);
        z-index: 100;
        display: none;
    }

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 600px;
    transform: translate(-50%, -50%);
    border-radius: 5px;
    background: #fff;
    box-shadow: 2px 3px 20px rgba(0, 0, 0, 0.2);
    z-index: 120;
    display: none;
}

.modal .modal-header {
    height: 50px;
    border-bottom: 1px solid #f5f5f5;
    padding: 0 15px;
}

.modal .modal-header p {
    line-height: 50px;
    display: inline-block;
}

.modal .modal-header .title {
    font-size: 18px;
    color: #333;
}

.modal .modal-header .close {
    float: right;
    font-size: 26px;
    margin-top: -2px;
    color: black;
    cursor: default;
}

.modal .modal-content {
    min-height: 150px;
}

.modal .modal-footer .btn {
    padding: 0 20px;
    height: 36px;
    line-height: 36px;
    color: #409EFF;
    /*#d9edf7 */
    background: gray;
    border: none;
}

.modal .modal-footer {
    border-top: 1px solid #f5f5f5;
    padding: 15px;
    text-align: right;

}

.container::after {
    content: "";
    display: block;
    clear: both;
}

html样式效果，跟上面JavaScript以及css匹配的页面：

这里是html引用head部分：

<link rel="stylesheet"
      href="{% static bootstrap %}bootstrap-3.3.7-dist/css/bootstrap.css">
<link rel="stylesheet" href="{% static css %}css/org_modal_frame_back.css">

<title>Title</title>
<script src="{% static js %}js/modal_tools.js"></script>
{#除了上面自己写的js方法和css样式以外，加上bootstrap的css引用即可#}
------------------------------------------------------------------------------------

{# modal frame begin #}
<div class="modal">
    <div class="modal-header">
        <p class="title">模态框编辑页</p>
        <p class="close">×</p>
    </div>
    <div class="modal-content">
        <table class="table table-bordered" border="1">
            <tr class="info">
                <th>ID</th>
                <th>NAME</th>
                <th>DATE</th>
                <th>MORNING</th>
                <th>AFTERNOON</th>
            </tr>
            <tr>
                <td><p id="record_id">1</p></td>

                <td>
                    <select id="person_name">
                        {% for person_name in names %}
                            <option value="">{{ person_name }}</option>
                        {% endfor %}
                    </select>
                </td>
                <td><input id="attend_date" type="date"
                           value=""></td>
                <td><select id="morning">
                    {% with morning_opt="01" %}
                        {% for each_opt in morning_opt %}
                            <option value="">{{ each_opt }}</option>
                        {% endfor %}
                    {% endwith %}

                </select></td>
                <td><select id="afternoon">
                    {% with after_opt="01" %}
                        {% for each_opt in after_opt %}
                            <option value="">{{ each_opt }}</option>
                        {% endfor %}
                    {% endwith %}
                </select></td>
            </tr>
        </table>
    </div>
    <div class="modal-footer">
        <button class="close btn" onclick="choose_ele()">提交</button>
    </div>
</div>
<div class="mask"></div>
{# modal frame end #}

效果图展示：

以上，能解决部分问题。如果一个页面用单个模态框，上面就够用了，虽然js写得比较麻烦，但是能解决问题。下面给出另一个解决方案。js代码更简洁。

solution two：

接下来的方法，不需要手些原生css，利用bootstrap框架里面的模态框组件，js的启动也更简介，唯一增加的就是js引用部分，需要先引用jQuery然后再引用bootstrap里面的js。

当然了，bootstrap里面的css是必须要引用的。

html页面：

<link rel="stylesheet"
          href="{% static bootstrap %}bootstrap-3.3.7-dist/css/bootstrap.css">
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
{#jQuery的引用必须要加在bootstrap的js前面，否则，bootstrap源码会报错找不到jQuery#}
    <script src="{% static bootstrap %}bootstrap-3.3.7-dist/js/bootstrap.js">
<style>
        .modal-title {
            font-weight: bolder
        }  {#这里是给模态框上面的提示title字体加粗设置#}
    </style>

<script>
function editModalOpen(index) {
            let id_ = Number(index);
            update_attend_value(id_);
            //展示模态框
            let modal = document.getElementById("exampleModal");
            //设置为可见
            modal.style.visibility = "visible";
        }
        function editModalClose() {
            //关闭模态框
            let modal = document.getElementById("exampleModal");
            //设置为不可见
            modal.style.visibility = "hidden";

        }
</script>
------------------------------------------------------------------------------------
{#如下都是body部分，下面这个按钮是触发模态框的按钮#}

<button class="toggleModal btn btn-primary"
        id="{{ forloop.counter0 }}" 
　　　　 data-toggle="modal"  {#这个属性是模态框组件的必备启动模态框属性，这里是固定的key=value值，不可改变#}
        data-target="#exampleModal"  {#这个属性也是模态框组件的必备属性值，key是固定的，value部分是模态框的id值#}
        onclick="editModalOpen(id)"
        type="button">edit attend
</button>

{#如下都是从bootstrap上直接copy过来的组件代码，我就在模态框的modal-body里面加上了我想加的数据#}

<div>
    <!-- Modal -->
    <div class="modal fade" id="exampleModal" tabindex="-1" role="dialog"
     aria-labelledby="exampleModalLabel" aria-hidden="true">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                    <span class="modal-title" id="exampleModalLabel">
                        edit attendance</span>
                <button type="button" class="close" 
　　　　　　　　　　　　　　 data-dismiss="modal"  {#关闭模态框属性，固定的key=value属性值，不可改变#}
                        aria-label="Close">
                    <span aria-hidden="true">&times;</span>
                </button>

            </div>
            <div class="modal-body">
                <table class="table table-bordered" border="1">
                    <tr class="info">
                        <th>ID</th>
                        <th>NAME</th>
                        <th>DATE</th>
                        <th>MORNING</th>
                        <th>AFTERNOON</th>
                    </tr>
                    <tr>
                        <td><label for="record_id"></label>
                            <p id="record_id">1</p></td>

                        <td><label for="person_name"></label>
                            <select id="person_name" class="form-control">
                                {% for person_name in names %}
                                    <option value="">{{ person_name }}</option>
                                {% endfor %}
                            </select>
                        </td>
                        <td><label for="attend_date"></label>
                            <input id="attend_date" type="date"
                                   class="form-control"
                                   value=""></td>
                        <td><label for="morning"></label>
                            <select id="morning" class="form-control">
                                {% with morning_opt="01" %}
                                    {% for each_opt in morning_opt %}
                                        <option value="">{{ each_opt }}</option>
                                    {% endfor %}
                                {% endwith %}

                            </select>
                        </td>
                        <td><label for="afternoon"></label>
                            <select id="afternoon" class="form-control">
                                {% with after_opt="01" %}
                                    {% for each_opt in after_opt %}
                                        <option value="">{{ each_opt }}</option>
                                    {% endfor %}
                                {% endwith %}
                            </select></td>
                    </tr>
                </table>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary"
                        data-dismiss="modal"  {#关闭模态框属性，不可改变#}
　　　　　　　　　　　　　　onclick="editModalClose()">
                    Close
                </button>
                <button type="button" class="btn btn-primary"
                        onclick="choose_ele()">Save changes
                </button>
            </div>
        </div>
    </div>
</div>
</div>

上面的solution one里面，用的window.onload方法，这个方法，没有办法创建两个模态框，我自己试过，怎么都不行，一个能用，第二个就不能用了。所以，才找到了solution two

这里面的方法，需要两个模态框，甚至更多模态框，只需要按照我的有色字体标记出来的关键点，叠加上去就行。需要注意的是，如果你一个页面有超过1个模态框，每个模态框外面，需要再加一层div包裹。

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