Accepting one parameter, \Granola\assetURL(); will build a url to a file that is processed with the build tools.
<img src="<?php echo \Granola\assetURL('images/example.png'); ?>"> Will result in <img src="https://example.com/wp-content/themes/granola/assets/images/example.png">
Accepting one parameter, \Granola\assetPath(); will build a path to a file that is processed with the build tools. This will return a full path to the file on disk.
$path = \Granola\assetPath('general/file.csv');
Requiring one parameter, and accepting a secondary optional parameter, assetContent allows for importing the contents of a file. The first parameter is a path to the file (relative to the assets directory), and the second a string that defines the type of content being loaded.
In the event of the second parameter being set to json, the file will be run through json_decode before being returned.
$content = \Granola\assetContent('images/example.svg'); // This will return the code that makes up the SVG $content = \Granola\assetContent('general/example.json', 'json'); // This will return the content of example.json after being passed through json_decode