Request Feature: Support direct WebAssembly import and run

[HKhademian]

It's good to directly run WebAssembly files in deno like .js and .ts files. If so then I can run:
deno run myTask.wasm
without any additional files and steps. (it exports a common function like main or start or ...)

Also it's good to directly import these files to project with simple and readable syntax:
import { task1 } from ".../myLib.wasm"

Like this code in dev.to, it writes a simple library function called square and import it in .ts file and run that .ts file with deno.

Example above can be very simpler:

const wasmCode = await Deno.readFile("./target/wasm32-unknown-unknown/debug/wasm_deno_example.wasm");
const wasmModule = new WebAssembly.Module(wasmCode);
const wasmInstance = new WebAssembly.Instance(wasmModule);
const {
    square,
} = wasmInstance.exports;

can write somthing like:

import { square } from "./target/wasm32-unknown-unknown/debug/wasm_deno_example.wasm";

It's much more readable, clean, easy to use, and also do not dirty the global context.

This simple feature enables more comfortable journey to publish libraries and write cross-platform deno apps.

[bartlomieju]

Duplicate of #5609

[HKhademian]

this nested issues has not direct vision to every one how want to help.
this feature request has two parts:
1- deno run WASM files from command line to create portable deno apps
2- deno support clean import WASM files to create easy to use libraries

and yes it's better to use --unstable flag for such features.

[Spoonbender]

From what I've gathered, wasm currently lacks the concept of an entry point ("main" function or top level code), so it is unclear how deno should execute the wasm module.
Perhaps we can provide a syntax for specifying the function name (also useful for ts/js), such as deno run mymodule.wasm;main or deno run --entrypoint main mymodule.wasm?

[bartlomieju]

I'm gonna close this issue as a duplicate of #5609, let's continue there.

[ghost]

@Spoonbender Sorry for the year late ping, but a WebAssembly module is allowed to choose a function that executes immediately upon compilation, reminiscence of Linux _start.