The function outline search bar works for JS functions defined with the syntax:

function functionName (args) {stuff};

but not with functions defined as expressions assigned to a variable:

functionName = function (args) {stuff};

Considering that variables can be reassigned to a function expression at any point, to support this something would have to be added to the GUI to move between places in the code where the variable is assigned to a different function.

Reproducible: Always