You are currently looking at the v11.0 docs, which are still a work in progress. If you miss anything, you may find it in the older v10.0 docs here.
Import & Export
Import a Module/File
Unlike JavaScript, ReScript doesn't have or need import statements:
The above code refers to the message binding in the file Student.res. Every ReScript file is also a module, so accessing another file's content is the same as accessing another module's content!
A ReScript project's file names need to be unique.
Export Stuff
By default, every file's type declaration, binding and module is exported, aka publicly usable by another file. This also means those values, once compiled into JS, are immediately usable by your JS code.
To only export a few selected things, use a .resi interface file.
Work with JavaScript Import & Export
To see how to import JS modules and export stuff for JS consumption, see the JavaScript Interop section's Import from/Export to JS.
