Magento2 check in template if page is homepage

Question

How would I check directly in a .phtml template if the requested page is homepage?

I would like to add conditionally a class to a given container

Answer 1

If you're checking which page is the homepage from your template then you're approaching Magento templating and layout incorrectly.

My approach generally is to create a block of type core/template and add that via layout to the correct layout handle.

More information can be found at this answer:

https://magento.stackexchange.com/a/30562/336

A deeper explanation of this misunderstood concept can be found at my blog here:

https://blog.philwinkle.com/the-most-misunderstood-concept-in-magento/

For an even deeper dive into Magento Layout read Alan Storm's book on the topic:

http://store.pulsestorm.net/products/no-frills-magento-layout

Answer 2

You can use instance of \Magento\Framework\App\Request\Http in your class constructor. If you are in a controller you don't need to do it.

You can already access it like this $request = $this->getRequest()

public function __construct(
    ...
    \Magento\Framework\App\Request\Http $request
) {
    ...
    $this->_request = $request;
}

Then you can check if is homepage or categorypage or productpage like this:

if ($this->_request->getFullActionName() == 'cms_index_index') {
    //you are on the homepage
}
if ($this->_request->getFullActionName() == 'catalog_product_view') {
    //you are on the product page
}
if ($this->_request->getFullActionName() == 'catalog_category_view') {
    //you are on the category page
}

Otherwise directly use in phtml file using object manager

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$request = $objectManager->get('\Magento\Framework\App\Request\Http');