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doc: document `url.format(urlString)` as deprecated under DEP0169 by Renegade334 · Pull Request #61644 · nodejs/node · GitHub
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doc: document url.format(urlString) as deprecated under DEP0169 #61644

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Feb 5, 2026
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doc: document url.format(urlString) as deprecated under DEP0169 #61644

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3 changes: 3 additions & 0 deletions doc/api/deprecations.md
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Expand Up @@ -3758,6 +3758,9 @@ Type: Application (non-`node_modules` code only)
have security implications. Use the [WHATWG URL API][] instead. CVEs are not
issued for `url.parse()` vulnerabilities.

Passing a string argument to [`url.format()`][] invokes `url.parse()`
internally, and is therefore also covered by this deprecation.

@JakobJingleheimer JakobJingleheimer Feb 2, 2026

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nit: I think covered sounds a little weird here

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internally, and is therefore also covered by this deprecation.
internally, and is therefore also effected by this deprecation.


### DEP0170: Invalid port when using `url.parse()`

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47 changes: 44 additions & 3 deletions doc/api/url.md
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Expand Up @@ -1739,9 +1739,8 @@
times.
-->

* `urlObject` {Object|string} A URL object (as returned by `url.parse()` or
constructed otherwise). If a string, it is converted to an object by passing
it to `url.parse()`.
* `urlObject` {Object} A URL object (as returned by `url.parse()` or
constructed otherwise).

@JakobJingleheimer JakobJingleheimer Feb 2, 2026

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nit: maybe just me, I think this sounds a little smoother, less yoda-ish

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constructed otherwise).
otherwise constructed).


The `url.format()` method returns a formatted URL string derived from
`urlObject`.
Expand Down Expand Up @@ -1822,6 +1821,48 @@
npx codemod@latest @nodejs/node-url-to-whatwg-url
```

### `url.format(urlString)`

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added: v0.1.25
changes:
- version:
- v24.0.0
pr-url: https://github.com/nodejs/node/pull/55017

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description: Application deprecation.
-->

> Stability: 0 - Deprecated: Use the WHATWG URL API instead.

* `urlString` {string} A string that will be passed to `url.parse()` and then
formatted.

`url.format(urlString)` is shorthand for `url.format(url.parse(urlString))`.

Because it invokes the deprecated [`url.parse()`][], passing a string argument
to `url.format()` is itself deprecated.

Canonicalizing a URL string can be performed using the WHATWG URL API, by
constructing a new URL object and calling [`url.toString()`][].

```mjs
import { URL } from 'node:url';

const unformatted = 'http://[fe80:0:0:0:0:0:0:1]:/a/b?a=b#abc';
const formatted = new URL(unformatted).toString();

console.log(formatted); // Prints: http://[fe80::1]/a/b?a=b#abc
```

```cjs
const { URL } = require('node:url');

const unformatted = 'http://[fe80:0:0:0:0:0:0:1]:/a/b?a=b#abc';
const formatted = new URL(unformatted).toString();

console.log(formatted); // Prints: http://[fe80::1]/a/b?a=b#abc
```

### `url.parse(urlString[, parseQueryString[, slashesDenoteHost]])`

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