Uncaught ReferenceError: initS2Loading is not defined

[khvalov]

Have issue after composer updates. Looks like Select2 get updated to 4th branch and get this widget broken

[khvalov]

Looking into issue nature I've discovered that in some cases select2-krajee.js is not registered as asset: (Case: when I'm using more than 1 Select 2 widgets with different themes)

there is small workaround / quickfix (not tested for consequences)

Select2.php:

if (in_array($this->theme, self::$_inbuiltThemes)) {
            $bundleClass = __NAMESPACE__ . '\Theme' . Inflector::id2camel($this->theme) . 'Asset';
            $bundleClass::register($view);
        } 

update with:

if (in_array($this->theme, self::$_inbuiltThemes)) {
            $bundleClass = __NAMESPACE__ . '\Theme' . Inflector::id2camel($this->theme) . 'Asset';
            $bundleClass::register($view);
        }  else {
            ThemeAsset::register($view);
        }

@kartik-v please advise is it bug?

[kartik-v]

Not sure I can reproduce an issue here. You can check how you are loading assets on your page and if the asset bundles are loading as intended - else explicitly load the asset bundles on your view if needed. Ensure the dependencies to asset bundles are also correctly configured and loaded.

[dbfernandes]

This issue also happened here after composer updates. The quickfix proposed by khvalov solved the problem.

[favourkiiza]

Facing the same issue after composer update

[kartik-v]

This happens if you are using any other THEME other than inbuilt themes provided with the widget. If you are using your own theme - just create the asset bundle extending kartik\select2\ThemeAsset