Multiple selection drop-down box of layui

want to implement layui multi-selection drop-down box 

 var select = $(this)
                            ,title = reElem.find("." + TITLE)
                            ,input = title.find("input")
                            ,multiSelect = title.find(".multiSelect")
                            ,dl = reElem.find("dl:eq(0)")
                            ,dds = dl.find("div>dd").length==0 ? dl.find("dd") : dl.find("div>dd")
                            ,index =  this.selectedIndex //
                            ,nearElem //select 
                            ,omit = typeof select.attr("lay-omit") === "undefined" //  x
                            ,isMulti = typeof select.attr("multiple") && typeof select.attr("multiple") === "string";

                        that.hidePlaceholder(title,select);
                        if(disabled) return;

this is a part of the form source code that has not been changed.

Javascript html5
Jan.08,2022

you might as well look for documentation and realizable methods instead of changing the source code. In the official module, there are netizens' custom components
layui custom components
select

layui multiple selection drop-down box

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b3a355-e745.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3a355-e745.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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