File: src/stubs/views/partials/fields/edit/json.blade.php.stub

                <div class="col-xs-12 col-sm-12 col-md-12">
                    <div class="form-group">
                        <strong>{FIELD_DISPLAY_NAME}:</strong>

                        <textarea
                            class="json_text"
                            name="{FIELD_MACHINE_NAME}"
                            id="jsontext_{FIELD_MACHINE_NAME}"
                            >{!! is_string({MODEL_VARIABLE}) ? {MODEL_VARIABLE} : json_encode({MODEL_VARIABLE} ?? new stdClass())  !!}</textarea>

                        <div id="jsoneditor_{FIELD_MACHINE_NAME}" class="json_editor"></div>

                        <script>
                            (function(uid){
                                container = document.getElementById("jsoneditor_" + uid)
                                options = {
                                    modes: ["code", "tree"],
                                    onChangeText: function(jsonString){
                                        document.getElementById("jsontext_" + uid).value = jsonString;
                                    }
                                }
                                editor = new JSONEditor(this.container, this.options)
                                initial = {!! is_string({MODEL_VARIABLE}) ? {MODEL_VARIABLE} : json_encode({MODEL_VARIABLE} ?? new stdClass())  !!}
                                editor.set(initial)
                            })("{FIELD_MACHINE_NAME}");

                        </script>
                    </div>
                </div>