v3.0.1

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diff

Fix cursor positioning for a special case (#​14812 by @​fisker)

// <|> is the cursor position

/* Input */
// All messages are represented in JSON.
// So, the prettier.py controls a subprocess which spawns "node {this_file}".
import {<|>  } from "fs"

/* Prettier 3.0.0 */
// All messages are represented in JSON.
// So, the prettier.py <|>controls a subprocess which spawns "node {this_file}".
import {} from "fs"

/* Prettier 3.0.1 */
// All messages are represented in JSON.
// So, the prettier.py controls a subprocess which spawns "node {this_file}".
import {<|>} from "fs"

Fix plugins/estree.d.ts to make it a module (#​15018 by @​kingyue737)

Add export {} in plugins/estree.d.ts to fix the "File is not a module" error

Add parenthesis around leading multiline comment in return statement (#​15037 by @​auvred)

// Input
function fn() {
  return (
    /**
     * @​type {...}
     */ expresssion
  )
}

// Prettier 3.0.0
function fn() {
  return /**
   * @​type {...}
   */ expresssion;
}

// Prettier 3.0.1
function fn() {
  return (
    /**
     * @​type {...}
     */ expresssion
  );
}

Add support for Vue "Generic Components" (#​15066 by @​auvred)

https://blog.vuejs.org/posts/vue-3-3#generic-components

<!-- Input -->
<script setup lang="ts" generic="T extends Type1 & Type2 & (Type3 | Type4), U extends string | number | boolean"></script>

<!-- Prettier 3.0.0 -->
<script
  setup
  lang="ts"
  generic="T extends Type1 & Type2 & (Type3 | Type4), U extends string | number | boolean"
></script>

<!-- Prettier 3.0.1 -->
<script
  setup
  lang="ts"
  generic="
    T extends Type1 & Type2 & (Type3 | Type4),
    U extends string | number | boolean
  "
></script>

Fix comments print in IfStatement (#​15076 by @​fisker)

function a(b) {
  if (b) return 1; // comment
  else return 2;
}

/* Prettier 3.0.0 */
Error: Comment "comment" was not printed. Please report this error!

/* Prettier 3.0.1 */
function a(b) {
  if (b) return 1; // comment
  else return 2;
}

Add missing type definition for printer.preprocess (#​15123 by @​so1ve)

export interface Printer<T = any> {
  // ...
+ preprocess?:
+   | ((ast: T, options: ParserOptions<T>) => T | Promise<T>)
+   | undefined;
}

Add missing getVisitorKeys method type definition for Printer (#​15125 by @​auvred)

const printer: Printer = {
  print: () => [],
  getVisitorKeys(node, nonTraversableKeys) {
    return ["body"];
  },
};

Add typing to support readonly array properties of AST Node (#​15127 by @​auvred)

// Input
interface TestNode {
  readonlyArray: readonly string[];
}

declare const path: AstPath<TestNode>;

path.map(() => "", "readonlyArray");

// Prettier 3.0.0
interface TestNode {
  readonlyArray: readonly string[];
}

declare const path: AstPath<TestNode>;

path.map(() => "", "readonlyArray");
//                  ^ Argument of type '"readonlyArray"' is not assignable to parameter of type '"regularArray"'. ts(2345)

// Prettier 3.0.1
interface TestNode {
  readonlyArray: readonly string[];
}

declare const path: AstPath<TestNode>;

path.map(() => "", "readonlyArray");

Add space before unary minus followed by a function call (#​15129 by @​pamelalozano)

// Input
div {
  margin: - func();
}

// Prettier 3.0.0
div {
  margin: -func();
}

// Prettier 3.0.1
div {
  margin: - func();
}

v3.0.0

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diff

🔗 Release Notes

v2.8.8

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This version is a republished version of v2.8.7.
A bad version was accidentally published and it can't be unpublished, apologies for the churn.

v2.8.7

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diff

Allow multiple decorators on same getter/setter (#​14584 by @​fisker)

// Input
class A {
  @​decorator()
  get foo () {}
  
  @​decorator()
  set foo (value) {}
}

// Prettier 2.8.6
SyntaxError: Decorators cannot be applied to multiple get/set accessors of the same name. (5:3)
  3 |   get foo () {}
  4 |   
> 5 |   @​decorator()
    |   ^^^^^^^^^^^^
  6 |   set foo (value) {}
  7 | }

// Prettier 2.8.7
class A {
  @​decorator()
  get foo() {}

  @​decorator()
  set foo(value) {}
}

v2.8.6

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diff

Allow decorators on private members and class expressions (#​14548 by @​fisker)

// Input
class A {
  @​decorator()
  #privateMethod () {}
}

// Prettier 2.8.5
SyntaxError: Decorators are not valid here. (2:3)
  1 | class A {
> 2 |   @​decorator()
    |   ^^^^^^^^^^^^
  3 |   #privateMethod () {}
  4 | }

// Prettier 2.8.6
class A {
  @​decorator()
  #privateMethod() {}
}

v2.8.5

Compare Source

diff

Support TypeScript 5.0 (#​14391 by @​fisker, #​13819 by @​fisker, @​sosukesuzuki)

TypeScript 5.0 introduces two new syntactic features:

• const modifiers for type parameters
• export type * declarations

Add missing parentheses for decorator (#​14393 by @​fisker)

// Input
class Person {
  @​(myDecoratorArray[0])
  greet() {}
}

// Prettier 2.8.4
class Person {
  @​myDecoratorArray[0]
  greet() {}
}

// Prettier 2.8.5
class Person {
  @​(myDecoratorArray[0])
  greet() {}
}

Add parentheses for TypeofTypeAnnotation to improve readability (#​14458 by @​fisker)

// Input
type A = (typeof node.children)[];

// Prettier 2.8.4
type A = typeof node.children[];

// Prettier 2.8.5
type A = (typeof node.children)[];

Support max_line_length=off when parsing .editorconfig (#​14516 by @​josephfrazier)

If an .editorconfig file is in your project and it sets max_line_length=off for the file you're formatting,
it will be interpreted as a printWidth of Infinity rather than being ignored
(which previously resulted in the default printWidth of 80 being applied, if not overridden by Prettier-specific configuration).

<!-- Input -->
<div className='HelloWorld' title={`You are visitor number ${ num }`} onMouseOver={onMouseOver}/>

<!-- Prettier 2.8.4 -->
<div
  className="HelloWorld"
  title={`You are visitor number ${num}`}
  onMouseOver={onMouseOver}
/>;

<!-- Prettier 2.8.5 -->
<div className="HelloWorld" title={`You are visitor number ${num}`} onMouseOver={onMouseOver} />;