I am trying to add custom CSS without creating a theme and these are my steps.
Step 1
I create a mycss.css
file
body{
background-color:green;
}
and this is the path
app/code/vendor/module/view/frontend/web/css/mycss.css
Step 2
I create a test_index_index.xml
file with this content
?xml version="1.0"?>
<page xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:View/Layout/etc/page_layout.xsd">
<head>
<css src="vendor_Module::css/mycss.
</head>
<body>
<referenceContainer name="content">
<block class="vendor\Module\Block\class" template="vendor_Module::class.phtml"/>
</referenceContainer>
</body>
</page>
Which is located at
app/code/vendor/module/view/frontend/layout/test_index_index.xml
Reference Magento 2: How to add css and js in custom module in magento 2?
Unfortunately, on my frontend nothing changes. Does anybody know why?