e-book - Modified by Events and Observers

JavaScript, CSS, and other static assets are added in the head section of a page configuration file. The default look of a store page head is defined by app/code/Magento/Theme/view/frontend/layout/default_head_blocks.xml. The recommended way to add CSS and JavaScript is to extend this file in your custom theme, and add the assets there. The following file is a sample of a file you must add: