# Synchronizing your code with MathJax

This page is under construction

MathJax version 2 used queues, callbacks, and signals as a means of coordinating your code with the actions of MathJax. Version 3 uses the more modern tool know as a promise to synchronize your code with MathJax. See the Handling Asynchronous Typesetting section for examples of typesetting using promises.

In addition to promises, MathJax version 3 introduces a renderActions configuration option that provides a means of linking into MathJax’s processing pipeline. This is a priorities list of functions to call during processing, which includes the default actions of finding the math in the page, compiling it into the internal format, getting font metrics for the surrounding text, typesetting the mathematics, inserting the math into the page, adding menu actions, and so on. You can insert your own functions into this chain to add more functionality, or even remove the existing steps to trim down what MathJax does.

More information will be coming to this section in the future.