When discussing WordPress, the term theme framework refers to a code library that is used to facilitate development of a theme, acting as a parent theme template. Developers create a child theme to add custom functionality and styling. This allows for a centralised location where all the core functions are hosted. It contains the core features that allows for functionality like HTML5, schema, sidebars, columns, nested comments, and author boxes. And if the core development team decide to deprecate or update a function in the framework/parent theme then they can do so without modifying the design in the child theme.
The development time is improved because all theme frameworks offer functionality and customisation options so the user does not have to code everything from scratch. Creating a child theme becomes as simple as creating a new style.css file and customize a few functions in a functions.php file.Back to the Top