Release 3.5.0

.github/ISSUE_TEMPLATE/formatting.md

@@ -26,7 +26,7 @@ Don't fill the form below manually! Let a program create a report for you:
 
 -->
 
-**Prettier 3.4.2**
+**Prettier 3.5.0**
 [Playground link](https://prettier.io/playground/#.....)
 
 ```sh

.github/ISSUE_TEMPLATE/integration.md

@@ -20,7 +20,7 @@ BEFORE SUBMITTING AN ISSUE:
 
 **Environments:**
 
-- Prettier Version: 3.4.2
+- Prettier Version: 3.5.0
 - Running Prettier via: <!-- CLI, Node.js API, Browser API, etc. -->
 - Runtime: <!-- Node.js v14, Chrome v83, etc. -->
 - Operating System: <!-- Windows, Linux, macOS, etc. -->

CHANGELOG.md

@@ -1,3 +1,9 @@
+# 3.5.0
+
+[diff](https://github.com/prettier/prettier/compare/3.4.2...3.5.0)
+
+🔗 [Release Notes](https://prettier.io/blog/2025/02/09/3.5.0.html)
+
 # 3.4.2
 
 [diff](https://github.com/prettier/prettier/compare/3.4.1...3.4.2)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "prettier",
-  "version": "3.5.0-dev",
+  "version": "3.5.0",
   "description": "Prettier is an opinionated code formatter",
   "bin": "./bin/prettier.cjs",
   "repository": "prettier/prettier",

website/versioned_docs/version-stable/browser.md

@@ -18,7 +18,7 @@ Required options:
 
 - **[`parser`](options.md#parser) (or [`filepath`](options.md#file-path))**: One of these options has to be specified for Prettier to know which parser to use.
 
-- **`plugins`**: Unlike the `format` function from the [Node.js-based API](api.md#prettierformatsource-options), this function doesn’t load plugins automatically. The `plugins` option is required because all the parsers included in the Prettier package come as plugins (for reasons of file size). These plugins are files in [https://unpkg.com/browse/prettier@3.4.2/plugins](https://unpkg.com/browse/prettier@3.4.2/plugins). Note that `estree` plugin should be loaded when printing JavaScript, TypeScript, Flow, or JSON.
+- **`plugins`**: Unlike the `format` function from the [Node.js-based API](api.md#prettierformatsource-options), this function doesn’t load plugins automatically. The `plugins` option is required because all the parsers included in the Prettier package come as plugins (for reasons of file size). These plugins are files in [https://unpkg.com/browse/prettier@3.5.0/plugins](https://unpkg.com/browse/prettier@3.5.0/plugins). Note that `estree` plugin should be loaded when printing JavaScript, TypeScript, Flow, or JSON.
 
   You need to load the ones that you’re going to use and pass them to `prettier.format` using the `plugins` option.
 
@@ -29,8 +29,8 @@ See below for examples.
 ### Global
 
 ```html
-<script src="https://unpkg.com/prettier@3.4.2/standalone.js"></script>
-<script src="https://unpkg.com/prettier@3.4.2/plugins/graphql.js"></script>
+<script src="https://unpkg.com/prettier@3.5.0/standalone.js"></script>
+<script src="https://unpkg.com/prettier@3.5.0/plugins/graphql.js"></script>
 <script>
   (async () => {
     const formatted = await prettier.format("type Query { hello: String }", {
@@ -47,8 +47,8 @@ Note that the [`unpkg` field](https://unpkg.com/#examples) in Prettier’s `pack
 
 ```html
 <script type="module">
-  import * as prettier from "https://unpkg.com/prettier@3.4.2/standalone.mjs";
-  import prettierPluginGraphql from "https://unpkg.com/prettier@3.4.2/plugins/graphql.mjs";
+  import * as prettier from "https://unpkg.com/prettier@3.5.0/standalone.mjs";
+  import prettierPluginGraphql from "https://unpkg.com/prettier@3.5.0/plugins/graphql.mjs";
 
   const formatted = await prettier.format("type Query { hello: String }", {
     parser: "graphql",
@@ -61,8 +61,8 @@ Note that the [`unpkg` field](https://unpkg.com/#examples) in Prettier’s `pack
 
 ```js
 define([
-  "https://unpkg.com/prettier@3.4.2/standalone.js",
-  "https://unpkg.com/prettier@3.4.2/plugins/graphql.js",
+  "https://unpkg.com/prettier@3.5.0/standalone.js",
+  "https://unpkg.com/prettier@3.5.0/plugins/graphql.js",
 ], async (prettier, ...plugins) => {
   const formatted = await prettier.format("type Query { hello: String }", {
     parser: "graphql",
@@ -90,8 +90,8 @@ This syntax doesn’t necessarily work in the browser, but it can be used when b
 ### Worker
 
 ```js
-importScripts("https://unpkg.com/prettier@3.4.2/standalone.js");
-importScripts("https://unpkg.com/prettier@3.4.2/plugins/graphql.js");
+importScripts("https://unpkg.com/prettier@3.5.0/standalone.js");
+importScripts("https://unpkg.com/prettier@3.5.0/plugins/graphql.js");
 
 (async () => {
   const formatted = await prettier.format("type Query { hello: String }", {
@@ -107,9 +107,9 @@ If you want to format [embedded code](options.md#embedded-language-formatting),
 
 ```html
 <script type="module">
-  import * as prettier from "https://unpkg.com/prettier@3.4.2/standalone.mjs";
-  import prettierPluginBabel from "https://unpkg.com/prettier@3.4.2/plugins/babel.mjs";
-  import prettierPluginEstree from "https://unpkg.com/prettier@3.4.2/plugins/estree.mjs";
+  import * as prettier from "https://unpkg.com/prettier@3.5.0/standalone.mjs";
+  import prettierPluginBabel from "https://unpkg.com/prettier@3.5.0/plugins/babel.mjs";
+  import prettierPluginEstree from "https://unpkg.com/prettier@3.5.0/plugins/estree.mjs";
 
   console.log(
     await prettier.format("const html=/* HTML */ `<DIV> </DIV>`", {
@@ -125,10 +125,10 @@ The HTML code embedded in JavaScript stays unformatted because the `html` parser
 
 ```html
 <script type="module">
-  import * as prettier from "https://unpkg.com/prettier@3.4.2/standalone.mjs";
-  import prettierPluginBabel from "https://unpkg.com/prettier@3.4.2/plugins/babel.mjs";
-  import prettierPluginEstree from "https://unpkg.com/prettier@3.4.2/plugins/estree.mjs";
-  import prettierPluginHtml from "https://unpkg.com/prettier@3.4.2/plugins/html.mjs";
+  import * as prettier from "https://unpkg.com/prettier@3.5.0/standalone.mjs";
+  import prettierPluginBabel from "https://unpkg.com/prettier@3.5.0/plugins/babel.mjs";
+  import prettierPluginEstree from "https://unpkg.com/prettier@3.5.0/plugins/estree.mjs";
+  import prettierPluginHtml from "https://unpkg.com/prettier@3.5.0/plugins/html.mjs";
 
   console.log(
     await prettier.format("const html=/* HTML */ `<DIV> </DIV>`", {

website/versioned_docs/version-stable/configuration.md

@@ -8,17 +8,37 @@ You can configure Prettier via (in order of precedence):
 - A `"prettier"` key in your `package.json`, or [`package.yaml`](https://github.com/pnpm/pnpm/pull/1799) file.
 - A `.prettierrc` file written in JSON or YAML.
 - A `.prettierrc.json`, `.prettierrc.yml`, `.prettierrc.yaml`, or `.prettierrc.json5` file.
-- A `.prettierrc.js`, or `prettier.config.js` file that exports an object using `export default` or `module.exports` (depends on the [`type`](https://nodejs.org/api/packages.html#type) value in your `package.json`).
-- A `.prettierrc.mjs`, or `prettier.config.mjs` file that exports an object using `export default`.
-- A `.prettierrc.cjs`, or `prettier.config.cjs` file that exports an object using `module.exports`.
+- A `.prettierrc.js`, `prettier.config.js`, `.prettierrc.ts`, or `prettier.config.ts` file that exports an object using `export default` or `module.exports` (depends on the [`type`](https://nodejs.org/api/packages.html#type) value in your `package.json`).
+- A `.prettierrc.mjs`, `prettier.config.mjs`, `.prettierrc.mts`, or `prettier.config.mts` file that exports an object using `export default`.
+- A `.prettierrc.cjs`, `prettier.config.cjs`, `.prettierrc.cts`, or `prettier.config.cts` file that exports an object using `module.exports`.
 - A `.prettierrc.toml` file.
 
+:::info
+
+TypeScript configuration files support requires [additional setup](#typescript-configuration-files)
+
+:::
+
 The configuration file will be resolved starting from the location of the file being formatted, and searching up the file tree until a config file is (or isn’t) found.
 
 Prettier intentionally doesn’t support any kind of global configuration. This is to make sure that when a project is copied to another computer, Prettier’s behavior stays the same. Otherwise, Prettier wouldn’t be able to guarantee that everybody in a team gets the same consistent results.
 
 The options you can use in the configuration file are the same as the [API options](options.md).
 
+### TypeScript Configuration Files
+
+TypeScript support for Node.js is currently experimental, Node.js>=22.6.0 is required and `--experimental-strip-types` is required to run Node.js.
+
+```sh
+node --experimental-strip-types node_modules/prettier/bin/prettier.cjs . --write
+```
+
+or
+
+```sh
+NODE_OPTIONS="--experimental-strip-types" prettier . --write
+```
+
 ## Basic Configuration
 
 JSON:
@@ -70,6 +90,34 @@ const config = {
 module.exports = config;
 ```
 
+TypeScript (ES Modules):
+
+```ts
+// prettier.config.ts, .prettierrc.ts, prettier.config.mts, or .prettierrc.mts
+
+import { type Config } from "prettier";
+
+const config: Config = {
+  trailingComma: "none",
+};
+
+export default config;
+```
+
+TypeScript (CommonJS):
+
+```ts
+// prettier.config.ts, .prettierrc.ts, prettier.config.cts, or .prettierrc.cts
+
+import { type Config } from "prettier";
+
+const config: Config = {
+  trailingComma: "none",
+};
+
+module.exports = config;
+```
+
 YAML:
 
 ```yaml
@@ -171,7 +219,7 @@ You can also switch to the `flow` parser instead of the default `babel` for .js
 
 ## Configuration Schema
 
-If you’d like a JSON schema to validate your configuration, one is available here: https://json.schemastore.org/prettierrc.
+If you’d like a JSON schema to validate your configuration, one is available here: [https://json.schemastore.org/prettierrc](https://json.schemastore.org/prettierrc).
 
 ## EditorConfig
 

website/versioned_docs/version-stable/ignore.md

@@ -145,6 +145,8 @@ This type of ignore is only allowed to be used in top-level and aimed to disable
 <!-- prettier-ignore-end -->
 ```
 
+**Important:** You must have a blank line before `<!-- prettier-ignore-start -->` and `<!-- prettier-ignore-end -->` for Prettier to recognize the comments.
+
 ## YAML
 
 To ignore a part of a YAML file, `# prettier-ignore` should be placed on the line immediately above the ignored node:

website/versioned_docs/version-stable/options.md

@@ -22,6 +22,17 @@ Valid options:
 | ------- | -------------------------- | ------------------------------- |
 | `false` | `--experimental-ternaries` | `experimentalTernaries: <bool>` |
 
+## Experimental Operator Position
+
+Valid options:
+
+- `"start"` - When binary expressions wrap lines, print operators at the start of new lines.
+- `"end"` - Default behavior; when binary expressions wrap lines, print operators at the end of previous lines.
+
+| Default | CLI Override                                                    | API Override                                                   |
+| ------- | --------------------------------------------------------------- | -------------------------------------------------------------- |
+| `"end"` | <code>--experimental-operator-position \<start&#124;end></code> | <code>experimentalOperatorPosition: "\<start&#124;end>"</code> |
+
 ## Print Width
 
 Specify the line length that the printer will wrap on.
@@ -156,6 +167,23 @@ Valid options:
 | ------- | ---------------------- | ------------------------ |
 | `true`  | `--no-bracket-spacing` | `bracketSpacing: <bool>` |
 
+## Object Wrap
+
+_First available in v3.5.0_
+
+Configure how Prettier wraps object literals when they could fit on one line or span multiple lines.
+
+By default, Prettier formats objects as multi-line if there is a newline prior to the first property. Authors can use this heuristic to contextually improve readability, though it has some downsides. See [Multi-line objects](rationale.md#multi-line-objects).
+
+Valid options:
+
+- `"preserve"` - Keep as multi-line, if there is a newline between the opening brace and first property.
+- `"collapse"` - Fit to a single line when possible.
+
+| Default      | CLI Override                                         | API Override                                         |
+| ------------ | ---------------------------------------------------- | ---------------------------------------------------- |
+| `"preserve"` | <code>--object-wrap \<preserve&#124;collapse></code> | <code>objectWrap: "\<preserve&#124;collapse>"</code> |
+
 ## Bracket Line
 
 Put the `>` of a multi-line HTML (HTML, JSX, Vue, Angular) element at the end of the last line instead of being alone on the next line (does not apply to self closing elements).

website/versioned_docs/version-stable/rationale.md

@@ -29,9 +29,11 @@ It turns out that empty lines are very hard to automatically generate. The appro
 
 ### Multi-line objects
 
-By default, Prettier’s printing algorithm prints expressions on a single line if they fit. Objects are used for a lot of different things in JavaScript, though, and sometimes it really helps readability if they stay multiline. See [object lists], [nested configs], [stylesheets] and [keyed methods], for example. We haven’t been able to find a good rule for all those cases, so Prettier instead keeps objects multiline if there’s a newline between the `{` and the first key in the original source code. A consequence of this is that long singleline objects are automatically expanded, but short multiline objects are never collapsed.
+By default, Prettier’s printing algorithm prints expressions on a single line if they fit. Objects are used for a lot of different things in JavaScript, though, and sometimes it really helps readability if they stay multiline. See [object lists], [nested configs], [stylesheets] and [keyed methods], for example. We haven’t been able to find a good rule for all those cases, so by default Prettier keeps objects multi-line if there’s a newline between the `{` and the first key in the original source code. Consequently, long single-line objects are automatically expanded, but short multi-line objects are never collapsed.
 
-**Tip:** If you have a multiline object that you’d like to join up into a single line:
+You can disable this conditional behavior with the [`objectWrap`](options.md#object-wrap) option.
+
+**Tip:** If you have a multi-line object that you’d like to join up into a single line:
 
 ```js
 const user = {
@@ -55,7 +57,7 @@ const user = {  name: "John Doe",
 const user = { name: "John Doe", age: 30 };
 ```
 
-And if you’d like to go multiline again, add in a newline after `{`:
+And if you’d like to go multi-line again, add in a newline after `{`:
 
 <!-- prettier-ignore -->
 ```js