如何將select2數(shù)組輸出轉(zhuǎn)換為單個(gè)字符串（以逗號(hào)分隔）？就像這樣"task_owner":"Administrator,abc2"。當(dāng)前輸出用逗號(hào)分隔，但在單個(gè)數(shù)組中"task_owner":["Administrator","abc2"]。這是因?yàn)閿?shù)據(jù)庫(kù)是通過(guò)字符串而不是數(shù)組接收的。另一個(gè)問(wèn)題，如何重新轉(zhuǎn)換回?cái)?shù)組，因?yàn)樵诰庉嬤^(guò)程中，Ajax 將從數(shù)據(jù)庫(kù)發(fā)送該字符串，我可能需要轉(zhuǎn)換回?cái)?shù)組以用于顯示目的。我被提到了這個(gè)鏈接但不起作用。<form id="myForm">    <select type="text" class="form-control myClass" id="myID" multiple="multiple"></select></form>$('.myClass').select2({    tags: true });    $('#btnSubmit').on('click',function(){    var testOutput = "";   // I put this because an error appear so I create a new var but the output is = "null", why?    var owner = $('#myID').val();    if (owner.val() !== null && owner.val().length > 0){        var testOutput = $('#myID') = owner.val().join(',');        testOutput = Object.assign({}, {task_owner: testOutput.task_owner.join(",")})    }    // parameter that need to send to API    var obj = {        task_owner : testOutput,        // Another parameter...    };    var params = JSON.stringify(obj);    $.ajax({        // My Ajax Condition...    });});