protected function renderToggleButton()
    {
        $icon = $this->htmlHlp->tag('span', '', ['class' => 'navbar-toggler-icon']);
        $screenReader = isset($this->screenReaderToggleText)
            ? "<span class=\"sr-only\">{$this->screenReaderToggleText}</span>"
            : '';

        return $this->htmlHlp->button("{$screenReader}\n{$icon}", [
            'class' => 'navbar-toggler',
            'data-toggle' => 'collapse',
            'data-target' => "#{$this->containerOptions['id']}",
        ]);
    }
protected function renderToggleButton()
    {
        $icon = $this->htmlHlp->tag('span', '', ['class' => 'navbar-toggler-icon']);
        $screenReader = isset($this->screenReaderToggleText)
            ? "<span class=\"sr-only\">{$this->screenReaderToggleText}</span>"
            : '';

        return $this->htmlHlp->button("{$screenReader}\n{$icon}", [
            'class' => 'navbar-toggler',
            'data-toggle' => 'collapse',
            'data-target' => "#{$this->containerOptions['id']}",
        ]);
    }
protected function renderToggleButton ( ) { $ icon = $ this -> htmlHlp -> tag ( 'span' , '' , [ 'class' => 'navbar-toggler-icon' ] ) ; $ screenReader = isset ( $ this -> screenReaderToggleText ) ? "<span class=\"sr-only\">{$this->screenReaderToggleText}</span>" : '' ; return $ this -> htmlHlp -> button ( "{$screenReader}\n{$icon}" , [ 'class' => 'navbar-toggler' , 'data-toggle' => 'collapse' , 'data-target' => "#{$this->containerOptions['id']}" , ] ) ; }
Renders collapsible toggle button.
@return string the rendering toggle button.
Renders collapsible toggle button .