schon/engine/core/templates/json_table_widget.html

{% load i18n %}
{% with input_cls="border border-base-200 bg-white font-medium placeholder-base-400 rounded-default shadow-xs text-font-default-light text-sm focus:outline-2 focus:-outline-offset-2 focus:outline-primary-600 dark:bg-base-900 dark:border-base-700 dark:text-font-default-dark dark:scheme-dark px-3 py-2 w-full" %}
<div class="max-w-4xl">
    <table class="w-full" id="table-{{ widget.attrs.id }}">
        <thead>
            <tr class="border-b border-base-200 dark:border-base-700">
                <th class="text-left text-xs font-semibold uppercase tracking-wide text-font-important-light dark:text-font-important-dark pb-2 pr-4 w-5/12">{% trans "Key" %}</th>
                <th class="text-left text-xs font-semibold uppercase tracking-wide text-font-important-light dark:text-font-important-dark pb-2 pr-4 w-5/12">{% trans "Value" %}</th>
                <th class="pb-2 w-2/12"></th>
            </tr>
        </thead>
        <tbody id="json-fields-{{ widget.attrs.id }}">
            {% for key, val in widget.value.items %}
            <tr class="border-b border-base-200 dark:border-base-700 group/row">
                <td class="py-2 pr-3">
                    <input type="text"
                           name="{{ widget.name }}_key"
                           value="{{ key }}"
                           placeholder="{% trans "key" %}"
                           class="{{ input_cls }}">
                </td>
                <td class="py-2 pr-3">
                    <input type="text"
                           name="{{ widget.name }}_value"
                           value="{% if val is list %}{{ val|join:', ' }}{% else %}{{ val }}{% endif %}"
                           placeholder="{% trans "value" %}"
                           class="{{ input_cls }}">
                </td>
                <td class="py-2">
                    <button type="button"
                            class="delete-row-btn border border-transparent cursor-pointer font-medium px-2 py-2 rounded-default text-center bg-red-600 text-white text-sm leading-none opacity-60 group-hover/row:opacity-100 transition-opacity"
                            title="{% trans "Delete row" %}">&#x2715;</button>
                </td>
            </tr>
            {% endfor %}
        </tbody>
    </table>
    <div class="mt-3">
        <button type="button"
                class="add-row-btn border border-transparent cursor-pointer font-medium px-3 py-2 rounded-default text-center whitespace-nowrap bg-primary-600 text-white text-sm"
                data-tbody="json-fields-{{ widget.attrs.id }}"
                data-name="{{ widget.name }}"
                data-input-cls="{{ input_cls }}">
            + {% trans "Add Row" %}
        </button>
    </div>
</div>
{% endwith %}

<script>
(function () {
    function wireDeleteBtn(btn) {
        btn.addEventListener("click", function () {
            btn.closest("tr").remove();
        });
    }

    function buildRow(name, inputCls) {
        const tr = document.createElement("tr");
        tr.className = "border-b border-base-200 dark:border-base-700 group/row";

        const mkTd = (paddingCls) => {
            const td = document.createElement("td");
            td.className = paddingCls;
            return td;
        };

        const mkInput = (fieldName, placeholder) => {
            const inp = document.createElement("input");
            inp.type = "text";
            inp.name = fieldName;
            inp.placeholder = placeholder;
            inp.className = inputCls;
            return inp;
        };

        const keyTd = mkTd("py-2 pr-3");
        keyTd.appendChild(mkInput(name + "_key", "key"));

        const valTd = mkTd("py-2 pr-3");
        valTd.appendChild(mkInput(name + "_value", "value"));

        const delTd = mkTd("py-2");
        const delBtn = document.createElement("button");
        delBtn.type = "button";
        delBtn.className = "delete-row-btn border border-transparent cursor-pointer font-medium px-2 py-2 rounded-default text-center bg-red-600 text-white text-sm leading-none";
        delBtn.title = "Delete row";
        delBtn.textContent = "\u2715";
        wireDeleteBtn(delBtn);
        delTd.appendChild(delBtn);

        tr.appendChild(keyTd);
        tr.appendChild(valTd);
        tr.appendChild(delTd);
        return tr;
    }

    document.addEventListener("DOMContentLoaded", function () {
        // Wire existing delete buttons
        document.querySelectorAll(".delete-row-btn").forEach(wireDeleteBtn);

        // Wire add-row buttons
        document.querySelectorAll(".add-row-btn").forEach(function (btn) {
            const tbody = document.getElementById(btn.dataset.tbody);
            if (!tbody) return;
            btn.addEventListener("click", function () {
                tbody.appendChild(buildRow(btn.dataset.name, btn.dataset.inputCls));
            });
        });
    });
}());
</script>