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doc: update WASI example to use import.meta.url #39925

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b25a914
doc: update WASI example to use import.meta.url
guybedford Aug 28, 2021
4578063
fixup: linting issue
guybedford Aug 28, 2021
3a1e2cd
fixup consistency
guybedford Aug 28, 2021
5f14a5c
fixup CJS example
guybedford Aug 28, 2021
01126c1
Update doc/api/wasi.md
guybedford Aug 28, 2021
5284b69
Update doc/api/wasi.md
guybedford Aug 29, 2021
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19 changes: 15 additions & 4 deletions doc/api/wasi.md
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Original file line number Diff line number Diff line change
Expand Up @@ -11,7 +11,7 @@ specification. WASI gives sandboxed WebAssembly applications access to the
underlying operating system via a collection of POSIX-like functions.

```mjs
import fs from 'fs';
import { readFile } from 'fs/promises';
import { WASI } from 'wasi';
import { argv, env } from 'process';

Expand All @@ -22,19 +22,25 @@ const wasi = new WASI({
'/sandbox': '/some/real/path/that/wasm/can/access'
}
});

// Some WASI binaries require:
// const importObject = { wasi_unstable: wasi.wasiImport };
const importObject = { wasi_snapshot_preview1: wasi.wasiImport };

const wasm = await WebAssembly.compile(fs.readFileSync('./demo.wasm'));
const wasm = await WebAssembly.compile(
await readFile(new URL('./demo.wasm', import.meta.url))
);
const instance = await WebAssembly.instantiate(wasm, importObject);

wasi.start(instance);
```

```cjs
'use strict';
const fs = require('fs');
const { readFile } = require('fs/promises');
const { WASI } = require('wasi');
const { argv, env } = require('process');
const { resolve } = require('path');

const wasi = new WASI({
args: argv,
Expand All @@ -43,10 +49,15 @@ const wasi = new WASI({
'/sandbox': '/some/real/path/that/wasm/can/access'
}
});

// Some WASI binaries require:
// const importObject = { wasi_unstable: wasi.wasiImport };
const importObject = { wasi_snapshot_preview1: wasi.wasiImport };

(async () => {
const wasm = await WebAssembly.compile(fs.readFileSync('./demo.wasm'));
const wasm = await WebAssembly.compile(
await readFile(resolve(__dirname, './demo.wasm'))
);
const instance = await WebAssembly.instantiate(wasm, importObject);

wasi.start(instance);
Expand Down