iotaCSS allows you to fully customize all classes based on your needs. Assuming you would like to change the syntax of
the classes from .u-absolute to u-display-absolute. To do this, you should update the namespace classes:
Enable responsive display utilities
By enabling the responsive display utilities, you have access to a set of utility classes which bind to breakpoints. By default, they bind to the iotaCSS global breakpoints specified in Settings.Core.
Heading hidden in mobile and display block on tablets and up.
Set breakpoints only for display utility
In case you would like to use different breakpoints to display utility only, you should use the local variable.