Layui は入力の入力と選択メソッドを実装します

<div class="layui-col-md4">
                <label class="layui-form-label">移交单位<span style="color:red">*</span></label>
                <div class="layui-input-block">
                    <input type="text" name="HandoverCompany" id="HandoverCompany" class="layui-input" style="position:absolute;z-index:2;width:80%;" lay-verify="required" value="111" onkeyup="search()" autocomplete="off">
                    <select type="text" id="hc_select" lay-filter="hc_select" autocomplete="off" placeholder="移交单位全称" lay-verify="required" class="layui-select" lay-search>
                        <option value="111">111</option>
                        <option value="222">222</option>
                        <option value="333">333</option>
                        <option value="444">444</option>
                        <option value="555">555</option>
                    </select>
                </div>
            </div>

layui.use(['form', 'layedit','upload'], function () {
            var form = layui.form
   form.on('select(hc_select)', function (data) {   //选择移交单位 赋值给input框
                $("#HandoverCompany").val(data.value);
                $("#hc_select").next().find("dl").css({ "display": "none" });
                form.render();
            });

            window.search = function () {
                var value = $("#HandoverCompany").val();
                $("#hc_select").val(value);
                form.render();
                $("#hc_select").next().find("dl").css({ "display": "block" });
                var dl = $("#hc_select").next().find("dl").children();
                var j = -1;
                for (var i = 0; i < dl.length; i++) {
                    if (dl[i].innerHTML.indexOf(value) <= -1) {
                        dl[i].style.display = "none";
                        j++;
                    }
                    if (j == dl.length-1) {
                        $("#hc_select").next().find("dl").css({ "display": "none" });
                    }
                }
                
            }
        });