import.source()
The import.source() syntax behaves like regular import() syntax, except that it results in an object that represents the module's compiled source code. The module is fetched and compiled, but its dependencies are not loaded and it is not linked or evaluated. It can be imperatively evaluated later, such as by using dynamic import or WebAssembly.instantiate().
To use import.source(), the target module must be of a kind that supports source phase imports. Currently, only WebAssembly modules support source phase imports, and result in WebAssembly.Module objects. JavaScript module source objects will be added by the ECMAScript Module Phase Imports proposal.
For more information about the semantics of source phase imports, see the import source declaration form.
Syntax
import.source(moduleName)
import.source(moduleName, options)
import.source() is special syntax (a "meta property"), not a method on an import object.
Parameters
See import().
Return value
Returns a promise that fulfills with an AbstractModuleSource object representing the module's compiled source after the module is loaded and compiled successfully.
Like regular import(), the promise rejects if the module cannot be loaded or parsed. It also rejects with a SyntaxError if the module type does not support source phase imports. The import does not load dependencies, link, or evaluate the module, so errors from those later steps are not reported.
Examples
Using import.source()
const myModuleSource = await import.source("./my-module.wasm");
const instance = await WebAssembly.instantiate(myModuleSource, {
env: { log: console.log },
});
const { exports } = instance;