WAT

Function Calls

Direct calls, indirect calls, imported callbacks, JavaScript exports, dispatch tables, and globals.

callcall_indirectimportstablesstable

A WASM function can call another function directly by index/name, call imported JS callbacks, or use `call_indirect` through a table for dynamic dispatch.

JavaScript calls exported functions as normal JS functions.
Imported functions must match expected signatures.
Tables provide virtual-function-table-style dispatch while keeping validation and type checks.
Globals can parameterize dispatch or runtime configuration.

References

Understanding WAT