yii\bootstrap\BootstrapWidgetTrait::registerClientEvents PHP Method

    protected function registerClientEvents()
    {
        if (!empty($this->clientEvents)) {
            $id = $this->options['id'];
            $js = [];
            foreach ($this->clientEvents as $event => $handler) {
                $js[] = "jQuery('#{$id}').on('{$event}', {$handler});";
            }
            $this->getView()->registerJs(implode("\n", $js));
        }
    }