JavaScript 下拉框 左边添加至右边

时间：2022-02-10 03:16:34

JavaScript 下拉框 左边添加至右边

关于如何实现右边下拉框中选项的排序一时没有好的解决方法，等想到了回来补充

<!DOCTYPE html>

<html>

<head>

    <meta charset="utf-8">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <title>Page Title</title>

    <meta name="viewport" content="width=device-width, initial-scale=1">

    <script src="jquery-3.3.1.min.js"></script>

    <style>

        #select1 {

            margin-left: 20px;

        }

        #select2{

            margin-left: 20px;

        }

        span{

            display: block;

            border: 1px solid orange;

            width: 135px;

            background-color: coral;

            color: whitesmoke;

            box-shadow: 1px 1px 10.1px salmon;

            margin-bottom: 5px;

            margin-top: 5px;

            cursor: pointer;

        }

        .container2{

            position: absolute;

            left:200px;

            top: 8px;

        }

    </style>

</head>

<body>

    <div class="container1">

        <select multiple name="" id="select1"  style="width:100px;height:150px;">

            <!-- multiple:使下拉框能够同时拖选多个选项 -->

            <option value="1">1</option>

            <option value="2">2</option>

            <option value="3">3</option>

            <option value="4">4</option>

            <option value="5">5</option>

            <option value="6">6</option>

            <option value="7">7</option>

            <option value="8">8</option>

            <option value="9">9</option>

            <option  value="10">10</option>

        </select>

        <div>

            <span id="add">选中添加到右边&gt;&gt;</span>

            <span id="addAll">全部添加到右边&gt;&gt;</span>

        </div>

    </div>

    <div class="container2">

        <select multiple name="" id="select2"  style="width:100px;height:150px;">

        </select>

        <div>

            <span id="remove">选中删除到左边&lt;&lt;</span>

            <span id="removeAll">全部删除到左边&lt;&lt;</span>

        </div>

    </div>

    <script>

        window.onload = function(){

            var addBtn = document.getElementById("add");

            var addAll = document.getElementById("addAll");

            var container = document.getElementsByClassName("container1")[0];

            var options = container.getElementsByTagName("option");

            var select1 = document.getElementById("select1");

            var select2 = document.getElementById("select2");

            var optSore = [];

            var valueStore = [];

            console.log(options);

            function addToRight(){

                var i = 0;

                for(i=0;i<options.length;i++){

                    if(options[i].selected){//别用.getAttrbute("selected")

                        // valueStore.push(options[i].value);

                        // optSore.push(options[i]);

                        console.log(options[i]);

                        var move =  select1.removeChild(options[i]);

                        console.log(move);

                        select2.appendChild(move);

                        i = i - 1;

                        //@解决了！options是左边容器中的选项列表，每次移除一个选项后，紧跟在后面的选项就会上移，

                        //所以要将这里的i前移一位 明天补个示意图

                    }

                }

                console.log(optSore,valueStore);

            }

            function addAllOpt(){

                var i = 0;

                for(i;i<options.length;i++){

                    optSore.push(options[i]);

                    valueStore.push(options[i].value);

                }

                console.log(optSore,valueStore);

            }

            addBtn.addEventListener("click",addToRight,false);

            addAll.addEventListener("click",addAllOpt,false);

        }

    </script>

    <script>

        // $(function(){

        //     $("#add").click(function(){

        //     var $selectedOpt = $("#select1 option:selected");

        //     var $remove = $selectedOpt.remove();//我惊了 你呢 原生js有这种操作吗

        //     $remove.prop("selected",false)//不然添加过去后会停留在被选中的状态

        //     .appendTo("#select2");

        // });

        //     $("#addAll").click(function(){

        //         var $removeAll = $("#select1 option").remove();

        //         $removeAll.appendTo("#select2");

        // })

        // });

    </script>

</body>

</html>

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