AjaxSubmitButton for Yii 2

=====================================

This is the powerful AjaxSubmitButton widget that renders an ajax button which is very similar to ajaxSubmitButton from Yii1 for Yii 2, but has many useful functions.

Basic Example

Example of usage of the widget with a custom widget (in this case Select2 widget).

The view:

use demogorgorn\ajax\AjaxSubmitButton;

<?php echo Html::beginForm('', 'post', ['class'=>'uk-width-medium-1-1 uk-form uk-form-horizontal']); ?>
      
<?= Select2::widget([
    'name' => 'country_code',
    'data' => Country::getAllCountries(),
    'options' => [
        'id' => 'country_select',
        'multiple' => false, 
        'placeholder' => 'Choose...',
        'class' => 'uk-width-medium-7-10']
     ]);
?>
       
<?php AjaxSubmitButton::begin([
    'label' => 'Check',
    'ajaxOptions' => [
        'type'=>'POST',
        'url'=>'country/getinfo',
        'success' => new \yii\web\JsExpression('function(html){
            $("#output").html(html);
            }'),
    ],
    'options' => ['class' => 'customclass', 'type' => 'submit'],
    ]);
    AjaxSubmitButton::end();
?>
            
<?php echo Html::endForm(); ?>

<div id="output"></div>

Please note: that #output is a div element which will be updated.

In controller:

public function actionGetinfo()
{
    if(!isset($_POST['country_code']) || empty($_POST['country_code']))
        return;

    $code = $_POST['country_code'];

    return $this->renderAjax('resultwidget', ['code' => $code]);
}

Example of usage with ActiveForm and client validation

The view:

    $form = ActiveForm::begin([
               'id' => 'add-form',
               'options' => ['class' => 'form-inline'],
            ]);

    ...

    AjaxSubmitButton::begin([
        'label' => 'Add',
        'useWithActiveForm' => 'add-form',
        'ajaxOptions' => [
            'type' => 'POST',
            'success' => new \yii\web\JsExpression("function(data) {
                if (data.status == true) 
                {
                    closeTopbar();
                }                                            
            }"),
        ],
        'options' => ['class' => 'btn btn-primary', 'type' => 'submit', 'id' =>'add-button'],
    ]);
    AjaxSubmitButton::end();
    
    ActiveForm::end()

As you can see it's quite easy to use the widget with ActiveForm - enough to set the ActiveForm's id to the 'useWithActiveForm' variable. (In this case id is 'add-form', without '#' symbol!).

Client validation

As I said before the widget can be used with ActiveForm and client validation enabled. If you wish to disable it, just set ActiveForm's 'enableClientValidation' to false.

    $form = ActiveForm::begin([
                'id' => 'filters-form',
                'enableClientValidation' => false
            ]);

Preloader use

It's possible to use the widget with your own custom preloader.

<?php AjaxSubmitButton::begin([
    'label' => 'Check',
    'ajaxOptions' => [
        'type'=>'POST',
        'url'=>'country/getinfo',
        'beforeSend' => new \yii\web\JsExpression('function(html){
            ... show preloader...
            }'),
        'success' => new \yii\web\JsExpression('function(html){
            ... hide preloader ...
            }'),
    ],
    'options' => ['class' => 'customclass', 'type' => 'submit'],
    ]);
    AjaxSubmitButton::end();
?>

File Uploads

AjaxSubmitButton fully supports file uploads. For example (look at the comments):

<?php AjaxSubmitButton::begin([
            'label' => 'Сохранить',
            'useWithActiveForm' => 'add-form',
            'ajaxOptions' => [
                'type' => 'POST',
                'processData' => false, // Don't process the files
                'contentType' => false, // Set content type to false as jQuery will tell the server its a query string request
                'data' => new \yii\web\JsExpression("new FormData($('#add-form')[0])"), // Do not stringify the form
                'success' => new \yii\web\JsExpression("function(data) {
                if (data.status == true) 
                {
                    // process result
                }                                            
            }"),
            ],
            'options' => ['class' => 'btn btn-primary', 'type' => 'submit', 'id' =>'add-button'],
        ]);
        AjaxSubmitButton::end(); ?>

Widget's options

Variable	Description	Type
ajaxOptions	ajax options	Array
options	HTML attributes and other options of the widget's container tag	Array
tagName	the tag to use to render the button (by default is 'button'. You can specify, for example, 'a' tag)	String
label	button's label	String
icon	button's icon	String (e.g. 'fa fa-download')
iconPosition	button icon position	const (ICON_POSITION_LEFT or ICON_POSITION_RIGHT)
encodeLabel	whether the label should be HTML-encoded	Boolean
clickedButtonVarName	js object name. It is unused when useWithActiveForm is enabled	String
useWithActiveForm	whether the button should not be used with ActiveForm. the id of ActiveForm to use the button with	Boolean / String

Installation

---

The preferred way to install this extension is through composer.

Either run

php composer.phar require demogorgorn/yii2-ajax-submit-button "*"

or add

"demogorgorn/yii2-ajax-submit-button": "*"

to the require section of your composer.json file and run composer update.