Runtime

Globals And String Constants

Mutable/immutable globals, JS Global objects, numeric globals, imported string constants, and string passing.

globalsstringsbuiltinsexperimental

Globals store scalar values or supported reference values. JavaScript can create `WebAssembly.Global` objects for imported globals and can inspect exported globals.

Immutable globals cannot be set after instantiation.
Mutable exported globals can be assigned through the JS object when allowed.
Portable strings are usually passed as pointer plus byte length into linear memory.

References

WebAssembly.Global JavaScript builtins Imported global string constants