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doc: update code examples for node:url module
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There are many things called `url` in this page including `url` module,
`URL` instances, etc.

The original example was not clear where these methods come from.

PR-URL: #38645
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
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fisker authored and richardlau committed Jul 16, 2021
1 parent 562b554 commit 965d2b1
Showing 1 changed file with 65 additions and 19 deletions.
84 changes: 65 additions & 19 deletions doc/api/url.md
Original file line number Diff line number Diff line change
Expand Up @@ -959,18 +959,37 @@ added: v10.12.0
This function ensures the correct decodings of percent-encoded characters as
well as ensuring a cross-platform valid absolute path string.

```js
new URL('file:///C:/path/').pathname; // Incorrect: /C:/path/
fileURLToPath('file:///C:/path/'); // Correct: C:\path\ (Windows)
```mjs
import { fileURLToPath } from 'url';

const __filename = fileURLToPath(import.meta.url);

new URL('file:///C:/path/').pathname; // Incorrect: /C:/path/
fileURLToPath('file:///C:/path/'); // Correct: C:\path\ (Windows)

new URL('file://nas/foo.txt').pathname; // Incorrect: /foo.txt
fileURLToPath('file://nas/foo.txt'); // Correct: \\nas\foo.txt (Windows)

new URL('file:///你好.txt').pathname; // Incorrect: /%E4%BD%A0%E5%A5%BD.txt
fileURLToPath('file:///你好.txt'); // Correct: /你好.txt (POSIX)

new URL('file:///hello world').pathname; // Incorrect: /hello%20world
fileURLToPath('file:///hello world'); // Correct: /hello world (POSIX)
```
new URL('file://nas/foo.txt').pathname; // Incorrect: /foo.txt
fileURLToPath('file://nas/foo.txt'); // Correct: \\nas\foo.txt (Windows)
```cjs
const { fileURLToPath } = require('url');
new URL('file:///C:/path/').pathname; // Incorrect: /C:/path/
fileURLToPath('file:///C:/path/'); // Correct: C:\path\ (Windows)

new URL('file:///你好.txt').pathname; // Incorrect: /%E4%BD%A0%E5%A5%BD.txt
fileURLToPath('file:///你好.txt'); // Correct: /你好.txt (POSIX)
new URL('file://nas/foo.txt').pathname; // Incorrect: /foo.txt
fileURLToPath('file://nas/foo.txt'); // Correct: \\nas\foo.txt (Windows)

new URL('file:///hello world').pathname; // Incorrect: /hello%20world
fileURLToPath('file:///hello world'); // Correct: /hello world (POSIX)
new URL('file:///你好.txt').pathname; // Incorrect: /%E4%BD%A0%E5%A5%BD.txt
fileURLToPath('file:///你好.txt'); // Correct: /你好.txt (POSIX)

new URL('file:///hello world').pathname; // Incorrect: /hello%20world
fileURLToPath('file:///hello world'); // Correct: /hello world (POSIX)
```
### `url.format(URL[, options])`
Expand Down Expand Up @@ -999,7 +1018,22 @@ string serializations of the URL. These are not, however, customizable in
any way. The `url.format(URL[, options])` method allows for basic customization
of the output.
```js
```mjs
import url from 'url';
const myURL = new URL('https://a:b@測試?abc#foo');

console.log(myURL.href);
// Prints https://a:b@xn--g6w251d/?abc#foo

console.log(myURL.toString());
// Prints https://a:b@xn--g6w251d/?abc#foo

console.log(url.format(myURL, { fragment: false, unicode: true, auth: false }));
// Prints 'https://測試/?abc'
```
```cjs
const url = require('url');
const myURL = new URL('https://a:b@測試?abc#foo');

console.log(myURL.href);
Expand All @@ -1023,17 +1057,28 @@ added: v10.12.0
This function ensures that `path` is resolved absolutely, and that the URL
control characters are correctly encoded when converting into a File URL.
```js
new URL(__filename); // Incorrect: throws (POSIX)
new URL(__filename); // Incorrect: C:\... (Windows)
pathToFileURL(__filename); // Correct: file:///... (POSIX)
pathToFileURL(__filename); // Correct: file:///C:/... (Windows)
```mjs
import { pathToFileURL } from 'url';

new URL('/foo#1', 'file:'); // Incorrect: file:///foo#1
pathToFileURL('/foo#1'); // Correct: file:///foo%231 (POSIX)
new URL('/foo#1', 'file:'); // Incorrect: file:///foo#1
pathToFileURL('/foo#1'); // Correct: file:///foo%231 (POSIX)

new URL('/some/path%.c', 'file:'); // Incorrect: file:///some/path%.c
pathToFileURL('/some/path%.c'); // Correct: file:///some/path%25.c (POSIX)
new URL('/some/path%.c', 'file:'); // Incorrect: file:///some/path%.c
pathToFileURL('/some/path%.c'); // Correct: file:///some/path%25.c (POSIX)
```
```cjs
const { pathToFileURL } = require('url');
new URL(__filename); // Incorrect: throws (POSIX)
new URL(__filename); // Incorrect: C:\... (Windows)
pathToFileURL(__filename); // Correct: file:///... (POSIX)
pathToFileURL(__filename); // Correct: file:///C:/... (Windows)

new URL('/foo#1', 'file:'); // Incorrect: file:///foo#1
pathToFileURL('/foo#1'); // Correct: file:///foo%231 (POSIX)

new URL('/some/path%.c', 'file:'); // Incorrect: file:///some/path%.c
pathToFileURL('/some/path%.c'); // Correct: file:///some/path%25.c (POSIX)
```
## Legacy URL API
Expand Down Expand Up @@ -1190,6 +1235,7 @@ The `url.format()` method returns a formatted URL string derived from
`urlObject`.
```js
const url = require('url');
url.format({
protocol: 'https',
hostname: 'example.com',
Expand Down

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