docs(wasm): add sections about Node.js and module access (#13978)

Co-authored-by: 翠 / green <[email protected]>

docs/guide/features.md

@@ -500,7 +500,8 @@ Note that variables only represent file names one level deep. If `file` is `'foo
 
 ## WebAssembly
 
-Pre-compiled `.wasm` files can be imported with `?init` - the default export will be an initialization function that returns a Promise of the wasm instance:
+Pre-compiled `.wasm` files can be imported with `?init`.
+The default export will be an initialization function that returns a Promise of the [`WebAssembly.Instance`](https://developer.mozilla.org/en-US/docs/WebAssembly/JavaScript_interface/Instance):
 
 ```js
 import init from './example.wasm?init'
@@ -510,7 +511,7 @@ init().then((instance) => {
 })
 ```
 
-The init function can also take the `imports` object which is passed along to `WebAssembly.instantiate` as its second argument:
+The init function can also take an importObject which is passed along to [`WebAssembly.instantiate`](https://developer.mozilla.org/en-US/docs/WebAssembly/JavaScript_interface/instantiate) as its second argument:
 
 ```js
 init({
@@ -524,13 +525,54 @@ init({
 })
 ```
 
-In the production build, `.wasm` files smaller than `assetInlineLimit` will be inlined as base64 strings. Otherwise, they will be copied to the dist directory as an asset and fetched on-demand.
+In the production build, `.wasm` files smaller than `assetInlineLimit` will be inlined as base64 strings. Otherwise, they will be treated as a [static asset](./assets) and fetched on-demand.
 
-::: warning
+::: tip NOTE
 [ES Module Integration Proposal for WebAssembly](https://github.com/WebAssembly/esm-integration) is not currently supported.
 Use [`vite-plugin-wasm`](https://github.com/Menci/vite-plugin-wasm) or other community plugins to handle this.
 :::
 
+### Accessing the WebAssembly Module
+
+If you need access to the `Module` object, e.g. to instantiate it multiple times, use an [explicit URL import](./assets#explicit-url-imports) to resolve the asset, and then perform the instantiation:
+
+```js
+import wasmUrl from 'foo.wasm?url'
+
+const main = async () => {
+  const responsePromise = fetch(wasmUrl)
+  const { module, instance } = await WebAssembly.instantiateStreaming(
+    responsePromise,
+  )
+  /* ... */
+}
+
+main()
+```
+
+### Fetching the module in Node.js
+
+In SSR, the `fetch()` happening as part of the `?init` import, may fail with `TypeError: Invalid URL`.
+See the issue [Support wasm in SSR](https://github.com/vitejs/vite/issues/8882).
+
+Here is an alternative, assuming the project base is the current directory:
+
+```js
+import wasmUrl from 'foo.wasm?url'
+import { readFile } from 'node:fs/promises'
+
+const main = async () => {
+  const resolvedUrl = (await import('./test/boot.test.wasm?url')).default
+  const buffer = await readFile('.' + resolvedUrl)
+  const { instance } = await WebAssembly.instantiate(buffer, {
+    /* ... */
+  })
+  /* ... */
+}
+
+main()
+```
+
 ## Web Workers
 
 ### Import with Constructors