• 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="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="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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  • 原文地址:https://www.cnblogs.com/linbudu/p/10630355.html
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