JSON Editor widget

<?php
use slavkovrn\jsoneditor\JsonEditorWidget;
use yii\widgets\ActiveForm;
use yii\helpers\Html;
?>
    <?php $ form = ActiveForm::begin(); ?>

    <?= $form->field($model, 'username')->widget(JsonEditorWidget::class,[
        'rootNodeName' => 'root1',
    ]) ?>

    <?= $form->field($model, 'email')->widget(JsonEditorWidget::class,[
        'rootNodeName' => 'root2',
    ]) ?>

    <div class="form-group">
        <?= Html::submitButton('Save', ['class' => 'btn btn-success']) ?>
    </div>

    <?php ActiveForm::end(); ?>​