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doc: improve fs code example quality #46948

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doc: improve fs code example quality #46948

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51ba66d
doc: improve fs code example quality
jakecastelli Mar 4, 2023
7ba5500
fix: add missing optional chaining operator
jakecastelli Mar 4, 2023
67da4a3
fixup
jakecastelli Mar 5, 2023
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32 changes: 19 additions & 13 deletions doc/api/fs.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1117,7 +1117,7 @@ try {

```cjs
const { mkdir } = require('node:fs/promises');
const { resolve, join } = require('node:path');
const { join } = require('node:path');

async function makeDirectory() {
const projectFolder = join(__dirname, 'test', 'project');
Expand Down Expand Up @@ -1159,9 +1159,11 @@ object with an `encoding` property specifying the character encoding to use.

```mjs
import { mkdtemp } from 'node:fs/promises';
import { join } from 'node:path';
import { tmpdir } from 'node:os';

try {
await mkdtemp(path.join(os.tmpdir(), 'foo-'));
await mkdtemp(join(tmpdir(), 'foo-'));
} catch (err) {
console.error(err);
}
Expand Down Expand Up @@ -3237,8 +3239,10 @@ object with an `encoding` property specifying the character encoding to use.

```mjs
import { mkdtemp } from 'node:fs';
import { join } from 'node:path';
import { tmpdir } from 'node:os';

mkdtemp(path.join(os.tmpdir(), 'foo-'), (err, directory) => {
mkdtemp(join(tmpdir(), 'foo-'), (err, directory) => {
if (err) throw err;
console.log(directory);
// Prints: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2
Expand Down Expand Up @@ -7542,6 +7546,8 @@ For example, the following is prone to error because the `fs.stat()`
operation might complete before the `fs.rename()` operation:

```js
const fs = require('node:fs');
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We would typically need to have two examples here, one ESM and one CJS. (doesn't have to block this PR from landing, but it'd need to happen at some point)

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No problems, once this PR lands I can work on another PR to make sure all of the fs code examples have js flavor 👌 (at the moment there are many of the examples in fs missing them)


fs.rename('/tmp/hello', '/tmp/world', (err) => {
if (err) throw err;
console.log('renamed complete');
Expand All @@ -7558,12 +7564,12 @@ of one before invoking the other:
```mjs
import { rename, stat } from 'node:fs/promises';

const from = '/tmp/hello';
const to = '/tmp/world';
const oldPath = '/tmp/hello';
const newPath = '/tmp/world';

try {
await rename(from, to);
const stats = await stat(to);
await rename(oldPath, newPath);
const stats = await stat(newPath);
console.log(`stats: ${JSON.stringify(stats)}`);
} catch (error) {
console.error('there was an error:', error.message);
Expand All @@ -7573,10 +7579,10 @@ try {
```cjs
const { rename, stat } = require('node:fs/promises');

(async function(from, to) {
(async function(oldPath, newPath) {
try {
await rename(from, to);
const stats = await stat(to);
await rename(oldPath, newPath);
const stats = await stat(newPath);
console.log(`stats: ${JSON.stringify(stats)}`);
} catch (error) {
console.error('there was an error:', error.message);
Expand Down Expand Up @@ -7632,7 +7638,7 @@ try {
fd = await open('/open/some/file.txt', 'r');
// Do something with the file
} finally {
await fd.close();
await fd?.close();
}
```

Expand All @@ -7646,7 +7652,7 @@ try {
fd = await open('file.txt', 'r');
// Do something with the file
} finally {
await fd.close();
await fd?.close();
}
```

Expand Down Expand Up @@ -7761,7 +7767,7 @@ try {
fd = await open(Buffer.from('/open/some/file.txt'), 'r');
// Do something with the file
} finally {
await fd.close();
await fd?.close();
}
```

Expand Down