@mathjax/src
    Preparing search index...

    Function expandable

    • Produces an instance of Expandable with the given values (to be used in defining options that can use keys that don't have default values). E.g., default options of the form:

      OPTIONS = { types: expandable({ a: 1, b: 2 }) }

      would allow user options of

      { types: { c: 3 } }

      without reporting an error.

      Parameters

      Returns OptionList

      The augmented options list