yii2 formwizard checkbox field and customize preview step - yii2

Question

I am using yii2-formwizard and I want to insert a checkbox as form input field for the field is_legal in a tabular step.
So in fieldConfig array, reading the documentation, I inserted the following code:
'is_legal' => [
'options' => [
'type' => 'checkbox',
],
'labelOptions' => [
'label' => \Yii::t('app', 'Legal Representative'),
],
],
The following image shows the result:
However, when I go the preview step I see the field of the checkbox set as undefined:
In fact, when I try to save the model, the is_legal field is not set.
First Question: where is the problem with the checkbox form field?
Second Question: is there any way to customize the preview step? For example instead of 'Step 5', I would like to write 'Legal Data'.

Answer 1

i created this widget and there are a few things you need to know.
First Answer
The undefined it is showing is not the value but the label of the checkbox, if you look into the getLabel() function in the formwizard.js file it looks into the siblings of the input field for a label and gets its text
let text = $('#' + fieldName).siblings('label').text();
to display on the preview step, and by default Yii2 wraps the input inside the label like
<label><input stype="checkbox"></label>
so you need to use the template option of the checkbox like below
'is_legal' => [
'options' => [
'type' => 'checkbox',
'template' => '{input}{beginLabel}{labelTitle}{endLabel}{error}{hint}',
],
'labelOptions' => [
'label' => \Yii::t('app', 'Legal Representative'),
],
],
Second Answer
No, currently the widget does not support the custom title for the Preview step sections, but i think I can add the support for providing the title of the headings as it makes sense too, if that sorts your problem.
Update
Ignore the Second Answer given above i just pushed the updates to the live branch you can now use the previewHeading option in the step settings. Update your composer by running composer update to update to the latest version and clear cache using CTRL+F5.
See the following sample code how to use previewHeading option
use buttflattery\formwizard\FormWizard;
echo FormWizard::widget([
'enablePreview'=>true,
'steps'=>[
[
'model'=>$user,
'title'=>'My Shoots',
'previewHeading'=>'My Heading Step 1',
'description'=>'Add your shoots',
'formInfoText'=>'Fill all fields'
],
[
'model'=> $profile,
'title'=>'My Shoots',
'previewHeading'=>'My Heading Step 2',
'description'=>'Add your shoots',
'formInfoText'=>'Fill all fields'
],
]
]);