How can I generate a dropdown with Tailwind and jQuery?

Question

So I need to make a button where it can generate a new dropdown div and can be continued until it reaches the amount that the user desires.

One of the dropdown inputs data is appended to the JSON variable I created on the script. Thing is, I have a problem with making sure that the newly generated dropdown div has the same JSON data as well. It's gone whenever I generated a new dropdown. I would love to hear some advice for me to polishing on this part, or whether this method that I used is not doable and practical enough. Thank you.

I think this is the part where I make mistakes, to append based on looping the new generated dropdown.

<div class="mx-10 my-5 border border-black p-3 formDiv1 sm:rounded-lg">
                <h1 class="level">Level 1</h1>
                <div class="grid md:grid-cols-2 py-2">
                    <label for="approval_type_1" class="col-span-1 self-center py-2">Approval Type: <span
                            class="text-red-600">*</span></label>
                    <select name="approval_type_1" id="approval_type_1" class="col-span-2 w-full rounded py-2">
                        <option selected disabled>Please select approval type...</option>
                        <option value="1">In Consultation With</option>
                        <option value="2">Endorsed by</option>
                        <option value="3">Reviewed by</option>
                        <option value="4">Approved by</option>
                    </select>
                </div>

                <div class="grid md:grid-cols-2 py-2">
                    <label for="approval_user_1" class="col-span-1 self-center py-2">Approval User: <span
                            class="text-red-600">*</span></label>
                    <select name="approval_user_1" id="approval_user_1" class="col-span-2 w-full rounded py-2 mySelect">
                        <option selected disabled>Please select a user...</option>
                    </select>
                </div>


const items = [
            {
                label: "Group Finance",
                value: "Group Finance"
            },
            {
                label: "Group Human Capital",
                value: "Group Human Capital"
            },
            {
                label: "Group Risk Management",
                value: "Group Risk Management"
            },
            {
                label: "Group Services and Communication",
                value: "Group Services and Communication",
            }
        ];

function appendOption(){
            var checkAppend = $(".mySelect").hasClass("addedList");
            $('.mySelect').addClass("addedList");
            $.each(items, function (i, item) {
                if(!checkAppend){
                    $('.mySelect').append($('<option>', { 
                        value: item.value,
                        text : item.label 
                    }));
                }
            });
        }

CodePen Example of Mine

Answer 1

jQuery is really useful, but there's a certain way it operates: when you use the ${selector} , then it finds all items in the scope (usually document ) that match the selector, and provides a list of items. BUT if you start a chained operation right after the selector returns , then the operator is applied to the first element in the array . append() is such an operator.

The other thing is that the elements you want the JSON appended to are dynamic elements : they are not there when the page loads, but are created dynamically. dynamic elements are not part of the simple $(selector) query - you have to dynamically "find" them after their creation.

So, the solution comes in two steps:

• you have to find the dynamically created elements
• you have to select the last element that matched your selector.

Here's a snippet that does both:

 const items = [{ label: "Group 1", value: "Group 1" }, { label: "Group 2", value: "Group 2" }, { label: "Group 3", value: "Group 3" }, { label: "Group 4", value: "Group 4", } ]; function appendOption() { /* $(document).find(selector) is dynamic: it refreshes on every run, so it finds the dynamically created elements. .last() is simply a jQuery function that gets you the last item from the matched set. $lastItem is a jQuery() object (that's why I put a $ as the first char in its name), so you can call jQuery functions on it, like.each() */ const $lastItem = $(document).find('.mySelect').last() var checkAppend = $lastItem.hasClass("addedList"); lastItem.addClass("addedList"); $.each(items, function(i, item) { if (.checkAppend) { $lastItem,append($('<option>': { value. item,value: text. item;label })); } }); } appendOption(). const getUserDataBtn = document;getElementById("get-user-data"). const getAddApprovalBtn = document;getElementById("addApproval"). const resetApprovalBtn = document;getElementById("resetApproval"). getUserDataBtn,addEventListener( "click". () => { console.log($("#approval_type");val()), }; false ). getAddApprovalBtn,addEventListener( "click". () => { const levelsLoop = $(".level");length + 1. const fbRenderLength = ";formDiv" + levelsLoop. const fbRenderLength2 = ";formDiv" + (levelsLoop - 1). if (fbRenderLength == ".formDiv2") { $(".formDiv1"):after(function() { return "<div class='mx-10 my-5 border border-black p-3 sm:rounded-lg formDiv" + levelsLoop + "'>" + "<h1 class='level'>Level " + levelsLoop + "</h1>" + "<div class='grid md:grid-cols-2 py-2'>" + "<label for='approval_type_" + levelsLoop + "' class='col-span-1 self-center py-2'>Approval Type. <span class='text-red-600'>*</span></label>" + "<select name='approval_type_" + levelsLoop + "' id='approval_type_" + levelsLoop + "' class='col-span-2 w-full rounded py-2'>" + "<option selected disabled>Please select approval type..:</option>" + "<option value='1'>In Consultation With</option>" + "<option value='2'>Endorsed by</option>" + "<option value='3'>Reviewed by</option>" + "<option value='4'>Approved by</option>" + "</select>" + "</div>" + "<div class='grid md:grid-cols-2 py-2'>" + "<label for='approval_user_" + levelsLoop + "' class='col-span-1 self-center py-2'>Approval User. <span class='text-red-600'>*</span></label>" + "<select name='approval_user_" + levelsLoop + "' id='approval_user_" + levelsLoop + "' class='col-span-2 w-full rounded py-2 mySelect'>" + "<option selected disabled>Please select a user..;</option>" + "</select>" + "</div>" + "</div>"; }). } else { $(fbRenderLength2):after(function() { return "<div class='mx-10 my-5 border border-black p-3 sm:rounded-lg formDiv" + levelsLoop + "'>" + "<h1 class='level'>Level " + levelsLoop + "</h1>" + "<div class='grid md:grid-cols-2 py-2'>" + "<label for='approval_type_" + levelsLoop + "' class='col-span-1 self-center py-2'>Approval Type. <span class='text-red-600'>*</span></label>" + "<select name='approval_type_" + levelsLoop + "' id='approval_type_" + levelsLoop + "' class='col-span-2 w-full rounded py-2'>" + "<option selected disabled>Please select approval type..:</option>" + "<option value='1'>In Consultation With</option>" + "<option value='2'>Endorsed by</option>" + "<option value='3'>Reviewed by</option>" + "<option value='4'>Approved by</option>" + "</select>" + "</div>" + "<div class='grid md:grid-cols-2 py-2'>" + "<label for='approval_user_" + levelsLoop + "' class='col-span-1 self-center py-2'>Approval User. <span class='text-red-600'>*</span></label>" + "<select name='approval_user_" + levelsLoop + "' id='approval_user_" + levelsLoop + "' class='col-span-2 w-full rounded py-2 mySelect'>" + "<option selected disabled>Please select a user..;</option>" + "</select>" + "</div>" + "</div>"; }); } appendOption(), }; false ). resetApprovalBtn,addEventListener( "click". () => { $(".mainDiv"):html("<div class='mx-10 my-5 border border-black p-3 formDiv1 sm:rounded-lg'>" + "<h1 class='level'>Level 1</h1>" + "<div class='grid md:grid-cols-2 py-2'>" + "<label for='approval_type_1' class='col-span-1 self-center py-2'>Approval Type. <span class='text-red-600'>*</span></label>" + "<select name='approval_type_1' id='approval_type_1' class='col-span-2 w-full rounded py-2'>" + "<option selected disabled>Please select approval type..:</option>" + "<option value='1'>In Consultation With</option>" + "<option value='2'>Endorsed by</option>" + "<option value='3'>Reviewed by</option>" + "<option value='4'>Approved by</option>" + "</select>" + "</div>" + "<div class='grid md:grid-cols-2 py-2'>" + "<label for='approval_user_1' class='col-span-1 self-center py-2'>Approval User. <span class='text-red-600'>*</span></label>" + "<select name='approval_user_1' id='approval_user_1' class='col-span-2 w-full rounded py-2 mySelect'>" + "<option selected disabled>Please select a user..;</option>" + "</select>" + "</div>" + "</div>"); appendOption(), }; false );

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script> <script src="https://cdn.tailwindcss.com"></script> <div class="max-w-7xl mx-auto sm:px-6 lg:px-8 pb-4"> <div class="mainDiv"> <div class="mx-10 my-5 border border-black p-3 formDiv1 sm:rounded-lg"> <h1 class="level">Level 1</h1> <div class="grid md:grid-cols-2 py-2"> <label for="approval_type_1" class="col-span-1 self-center py-2">Approval Type: <span class="text-red-600">*</span></label> <select name="approval_type_1" id="approval_type_1" class="col-span-2 w-full rounded py-2"> <option selected disabled>Please select approval type...</option> <option value="1">In Consultation With</option> <option value="2">Endorsed by</option> <option value="3">Reviewed by</option> <option value="4">Approved by</option> </select> </div> <div class="grid md:grid-cols-2 py-2"> <label for="approval_user_1" class="col-span-1 self-center py-2">Approval User: <span class="text-red-600">*</span></label> <select name="approval_user_1" id="approval_user_1" class="col-span-2 w-full rounded py-2 mySelect fromHTML"> <option selected disabled>Please select a user...</option> </select> </div> <label class="inline-flex items-center mt-3"> <input type="checkbox" class="form-checkbox h-5 w-5 text-gray-600" checked><span class="ml-2 text-gray-700">Add Concurrent Approver?</span> </label> </div> </div> <div class="mx-10 my-5"> <button class="h-12 bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded m-2" type="button" id="addApproval">Add Approval</button> <button class="h-12 bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded m-2" type="button" id="resetApproval">Reset Approval</button> <button class="h-12 bg-blue-500 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded m-2" type="button" id="get-user-data">Get Updated formData</button> </div> </div>

IMPORTANT: doing such things with every click is not efficient. You should restructure your code so that the last element is always available, you don't have to find it . But I think this is another topic.

DISCLAIMER: I hope this answers your question, as I'm not 100% sure what you needed.