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CLI

Fix `--stdin` regression in 1.19.0 (#6894 by @lydell)

// Prettier stable
$ echo "test" | prettier --stdin --parser babel
[error] regeneratorRuntime is not defined

// Prettier master
$ echo "test" | prettier --stdin --parser babel
test;

TypeScript

Fix formatting of union type as arrow function return type (#6896 by @thorn0)

// Input
export const getVehicleDescriptor = async (
  vehicleId: string,
): Promise<Collections.Parts.PrintedCircuitBoardAssembly['attributes'] | undefined> => {}

// Prettier stable
export const getVehicleDescriptor = async (
  vehicleId: string
): Promise<| Collections.Parts.PrintedCircuitBoardAssembly["attributes"]
| undefined> => {};

// Prettier master
export const getVehicleDescriptor = async (
  vehicleId: string
): Promise<
  Collections.Parts.PrintedCircuitBoardAssembly["attributes"] | undefined
> => {};

`v1.19.0`

`v1.18.2`

TypeScript: only add trailing commas in tuples for --trailing-comma=all (#6199 by @duailibe)

In Prettier 1.18 we added trailing commas in tuples when --trailing-comma=all, but it was also adding for --trailing-comma=es5.

`v1.18.1`

TypeScript: Add trailing comma in tsx, only for arrow function (#6190 by @sosukesuzuki)

Prettier inserts a trailing comma to single type parameter for arrow functions in tsx, since v 1.18. But, this feature inserts a trailing comma to type parameter for besides arrow functions too (e.g, function , interface). This change fix it.

// Input
interface Interface1<T> {
  one: "one";
}
function function1<T>() {
  return "one";
}

// Output (Prettier 1.18.0)
interface Interface1<T,> {
  one: "one";
}
function function1<T,>() {
  return "one";
}

// Output (Prettier 1.18.1)
interface Interface1<T> {
  one: "one";
}
function function1<T>() {
  return "one";
}

Config: Match dotfiles in config overrides (#6194 by @duailibe)

When using overrides in the config file, Prettier was not matching dotfiles (files that start with .). This was fixed in 1.18.1

`v1.18.0`

`v1.17.1`

Range: Fix ranged formatting not using the correct line width (#6050 by @mathieulj)

// Input
function f() {
  if (true) {
    call("this line is 79 chars", "long", "it should", "stay as single line");
  }
}

// Output (Prettier 1.17.0 run with --range-start 30 --range-end 110)
function f() {
  if (true) {
    call(
      "this line is 79 chars",
      "long",
      "it should",
      "stay as single line"
    );
  }
}

// Output (Prettier 1.17.0 run without range)
function f() {
  if (true) {
    call("this line is 79 chars", "long", "it should", "stay as single line");
  }
}

// Output (Prettier 1.17.1 with and without range)
function f() {
  if (true) {
    call("this line is 79 chars", "long", "it should", "stay as single line");
  }
}

JavaScript: Fix closure compiler typecasts ([#5947] by @jridgewell)

If a closing parenthesis follows after a typecast in an inner expression, the typecast would wrap everything to the that following parenthesis.

// Input
test(/** @&#8203;type {!Array} */(arrOrString).length);
test(/** @&#8203;type {!Array} */((arrOrString)).length + 1);

// Output (Prettier 1.17.0)
test(/** @&#8203;type {!Array} */ (arrOrString.length));
test(/** @&#8203;type {!Array} */ (arrOrString.length + 1));

// Output (Prettier 1.17.1)
test(/** @&#8203;type {!Array} */ (arrOrString).length);
test(/** @&#8203;type {!Array} */ (arrOrString).length + 1);

JavaScript: respect parenthesis around optional chaining before await (#6087 by @evilebottnawi)

// Input
async function myFunction() {
  var x = (await foo.bar.blah)?.hi;
}

// Output (Prettier 1.17.0)
async function myFunction() {
  var x = await foo.bar.blah?.hi;
}

// Output (Prettier 1.17.1)
async function myFunction() {
  var x = (await foo.bar.blah)?.hi;
}

Handlebars: Fix {{else}}{{#if}} into {{else if}} merging (#6080 by @dcyriller)

// Input
{{#if a}}
  a
{{else}}
  {{#if c}}
    c
  {{/if}}
  e
{{/if}}

// Output (Prettier 1.17.0)
{{#if a}}
  a
{{else if c}}
  c
e
{{/if}}

// Output (Prettier 1.17.1)
Code Sample
{{#if a}}
  a
{{else}}
  {{#if c}}
    c
  {{/if}}
  e
{{/if}}

JavaScript: Improved multiline closure compiler typecast comment detection (#6070 by @yangsu)

Previously, multiline closure compiler typecast comments with lines that
start with * weren't flagged correctly and the subsequent parenthesis were
stripped. Prettier 1.17.1 fixes this issue.

// Input
const style =/**
 * @&#8203;type {{
 *   width: number,
 * }}
*/({
  width,
});

// Output (Prettier 1.17.0)
const style =/**
 * @&#8203;type {{
 *   width: number,
 * }}
*/ {
  width,
};

// Output (Prettier 1.17.1)
const style =/**
 * @&#8203;type {{
 *   width: number,
 * }}
*/({
  width,
});

`v1.17.0`

`v1.16.4`

API: Fix prettier.getSupportInfo() reporting babel parser for older versions of Prettier. (#5826 by @azz)

In version 1.16.0 of Prettier, the babylon parser was renamed to babel. Unfortunately this lead to a minor breaking change: prettier.getSupportInfo('1.15.0') would report that it supported babel, not babylon, which breaks text-editor integrations. This has now been fixed.

`v1.16.3`

TypeScript: Revert "Update typescript-estree to new package name" (#5818 by @ikatyang)

There's an internal change introduced in Prettier 1.16.2,
which updated typescript-estree to its new package name,
but unfortunately it broke the output
so we reverted it as a temporary workaround for now.

// Input
export default {
  load<K, T>(k: K, t: T) {
    return {k, t};
  }
}

// Output (Prettier 1.16.2)
export default {
  load(k: K, t: T) {
    return { k, t };
  }
};

// Output (Prettier 1.16.3)
export default {
  load<K, T>(k: K, t: T) {
    return { k, t };
  }
};

`v1.16.2`

CLI: Fix CI detection to avoid unwanted TTY behavior (#5804 by @kachkaev)

In Prettier 1.16.0 and 1.16.1, --list-different and --check logged every file in some CI environments, instead of just unformatted files.
This unwanted behavior is now fixed.
HTML: Do not format non-normal whitespace as normal whitespace (#5797 by @ikatyang)

Previously, only non-breaking whitespaces (U+00A0) are marked as non-normal whitespace,
which means other non-normal whitespaces such as non-breaking narrow whitespaces (U+202F)
could be formatted as normal whitespaces, which breaks the output. We now follow the spec to
exclude all non-ASCII whitespace from whitespace normalization.

(· represents a non-breaking narrow whitespace)
```

Prix·:·32·€


Prix : 32 €


Prix·:·32·€
```

JavaScript: Fix record type cast comment detection (#5793 by @yangsu)

Previously, type cast comments with record types were ignored and prettier
stripped the subsequent parens. Prettier 1.16.2 handles these cases correctly.

// Input
const v = /** @&#8203;type {{key: number}} */ (value);

// Output (Prettier 1.16.1)
const v = /** @&#8203;type {{key: number}} */ value;

// Output (Prettier 1.16.2)
const v = /** @&#8203;type {{key: number}} */ (value);

`v1.16.1`

JavaScript: Do not format functions with arguments as react hooks (#5778 by @SimenB)

The formatting added in Prettier 1.16 would format any function receiving an
arrow function and an array literal to match React Hook's documentation.
Prettier will now format this the same as before that change if the arrow
function receives any arguments.

// Input
["red", "white", "blue", "black", "hotpink", "rebeccapurple"].reduce(
  (allColors, color) => {
    return allColors.concat(color);
  },
  []
);

// Output (Prettier 1.16.0)
["red", "white", "blue", "black", "hotpink", "rebeccapurple"].reduce((
  allColors,
  color
) => {
  return allColors.concat(color);
}, []);

// Output (Prettier 1.16.1)
["red", "white", "blue", "black", "hotpink", "rebeccapurple"].reduce(
  (allColors, color) => {
    return allColors.concat(color);
  },
  []
);

JavaScript: Add necessary parentheses for decorators (#5785 by @ikatyang)

Parentheses for decorators with nested call expressions are optional for legacy decorators
but they're required for decorators in the current proposal.

// Input
class X {
  @&#8203;(computed().volatile())
  prop
}

// Output (Prettier 1.16.0)
class X {
  @&#8203;computed().volatile()
  prop
}

// Output (Prettier 1.16.1)
class X {
  @&#8203;(computed().volatile())
  prop
}

TypeScript: Stable parentheses for function type in the return type of arrow function (#5790 by @ikatyang)

There's a regression introduced in 1.16 that
parentheses for function type in the return type of arrow function were kept adding/removing.
Their parentheses are always printed now.

// Input
const foo = (): (() => void) => (): void => null;
const bar = (): () => void => (): void => null;

// First Output (Prettier 1.16.0)
const foo = (): () => void => (): void => null;
const bar = (): (() => void) => (): void => null;

// Second Output (Prettier 1.16.0)
const foo = (): (() => void) => (): void => null;
const bar = (): () => void => (): void => null;

// Output (Prettier 1.16.1)
const foo = (): (() => void) => (): void => null;
const bar = (): (() => void) => (): void => null;

MDX: Correctly recognize inline JSX (#5783 by @ikatyang)

Previously, some inline JSXs are wrongly recognized as block HTML/JSX,
which causes unexpected behaviors. This issue is now fixed.
```

_foo <InlineJSX /> bar_


_foo

<InlineJSX /> bar_


_foo <InlineJSX /> bar_
```

`v1.16.0`

`v1.15.3`

JavaScript: support htm (#5565)
JavaScript: support logical assignment operator (#5489)
JavaScript: do not add quotes for interpolation-only attributes in html templates (#5544)
JavaScript: add missing parenthesis for binary in optional member (#5543)
JavaScript: fix a parser regression (#5530)
JavaScript: improve union types with leading comments (#5575)
TypeScript: support BigInt (#5546, #5577)
TypeScript: inline method decorators should stay inlined (#5444)
TypeScript: do not change module into namespace and break/hug their body correctly (#5551)
TypeScript: do not add invalid semicolon for construct in interface with // prettier-ignore (#5469)
HTML: do not touch comments (#5525)
HTML: preserve bogus comments <! ... >/<? ... > (#5565)
HTML: support IE conditional start/end comment (#5470)
HTML: do not add extra indentation for js template in <script> (#5527)
HTML: leading spaces for the first interpolation in <textarea> are sensitive (#5468)
HTML: preserve content for element in <pre> correctly (#5473)
HTML: correct column for error code frame (#5553)
Angular: support interpolation in attributes (#5573)
Angular: do not print colon for then and else in *ngIf (#5542)
Angular/Vue: do not normalize tag/attribute names (#5526, #5549)
Vue: preserve custom block (#5458)
Vue: remove unnecessary semicolon and preserve necessary semicolon for single expression in event bindings (#5519)
Vue: group slot-scope correctly (#5563)
Markdown: do not trim content in inline-math (#5485)
Markdown: add more category to CJK regex (#5480)
SCSS: update parser for performance improvements (#5481)
YAML: preserve the first document head end marker --- (#5502)
API: resolve ignored field correctly in .getFileInfo() with absolute filePath (#5570)
API/CLI: fix a bug that caches for .js config files did not respect .clearConfigCache() (#5558)
API/CLI: ignore unset in .editorconfig (#5550)
CLI: report status code 0 for --list-different + --write (#5512)
Standalone: fix a regression for browser compatibility (#5560)

`v1.15.2`

CLI: allow flag overriding (#5390)
JavaScript: do not apply test call formatting to arrow function without body (#5366)
JavaScript: do not duplicate comments in styled-components (#5416)
JavaScript: do not indent comments behind variable declarations (#5434)
JavaScript: inline property decorator should stay inline (#5364, #5423)
JavaScript: treat createSelector as function composition (#5430)
Flow: do not move flow comment for function argument to its body (#5435)
Flow: force-break interface body to be consistent with TypeScript interface (#5432)
Flow/TypeScript: remove extra indentation for extends (#5432)
TypeScript: distinguish module and namespace correctly (#5432)
HTML: handle CRLF correctly (#5393)
HTML: handle <pre> with interpolation (#5400)
HTML: preserve content for <template> with unknown lang (#5388)
HTML: preserve incomplete IE conditional comments (#5429)
HTML: preserve unterminated IE conditional comments (#5424)
HTML: treat capital element as custom element (#5395)
Angular: add missing parens for pipe in ternary (#5397)
Angular: correctly print unary expression with operator + (#5405)
Angular: correctly handle parens (#5387)
Angular/Vue: whitespaces between interpolation and text are sensitive (#5396)
Vue: do not add invalid semicolon for v-on attribute value (#5418)
SCSS: do not crash on grid value (#5394)
Markdown: handle CRLF correctly (#5414)
Markdown: identify CJK correctly (#5402)
MDX: treat JSX code block same as in Markdown (#5391)

`v1.15.1`

Markdown: do not keep increasing backslashes for dollar sign (#5358)

`v1.15.0`

`v1.14.3`

Chore: add missing LICENSE (#5114)

`v1.14.2`

YAML: fix the line ending issue on Windows (#4957)
TypeScript: better error message (#4947)

`v1.14.1`

JavaScript: add parens for unary in bind (#4950)
JavaScript: format angular jasmine it("should ...", fakeAsync(() => { ... correctly. (#4954)
JavaScript: Revert this/super blacklist for function composition heuristic (#4936)
JavaScript: no extra space on Flow interface method named static (#4910)
JavaScript: no extra line break in destructed assignment of ternary (#4932)
Flow: print ObjectTypeInternalSlot with both flow/babel parsers (#4869)
TypeScript: no invalid output for ImportType in TypeReference (#4939)
YAML: do not throw on duplicate merge key (#4931)
YAML: no duplicate comments in mappingValue (#4931)
YAML: print end comment in nested mapping correctly (#4918)
YAML: do not put singleline values on a separate line from the key (#4916)
YAML: prefer dash as document separator (#4921)
API: update support info for Flow (#4943)
CLI: ignore .git, .svn and .hg directories (#4906)
CLI: support TOML configuration files (#4877)

`v1.14.0`

`v1.13.7`

Remove calls to eval("require") in the distributed code (#4766)

`v1.13.6`

Upgrade Flow parser to 0.75.0 (#4649 and #4727)
Preserve type parameters of import-types in TypeScript (#4662)
Preserve parens for type casting for sub-item (#4648)

`v1.13.5`

Better handling of trailing spaces in Markdown (#4593)
Fix empty file error in JSON and GraphQL (#4553)
Preserve decorator on TypeScript interfaces (#4632)
Inline _ or $ in the root of a method chain (#4621)

`v1.13.4`

Fix a regression when printing graphql-in-js (#4616)

`v1.13.3`

Fix a regression when printing hasOwnProperty and other functions in Object's prototype (#4603)
Fix a regression in exit status when using --debug-check and --list-different (#4600)

`v1.13.2`

Republished 1.13.1 with missing README included this time

`v1.13.1`

Revert default parser change in API (still present in CLI)

`v1.13.0`

`v1.12.1`

Fix for tag being removed from CSS with embedded expressions (#4302)
Wrap awaits in unary expressions with parens (#4315)
Fix style regression on flow union types (#4325)

`v1.12.0`

`v1.11.1`

1.11.0 was incorrectly shipped with the wrong version of the TypeScript parser, which broke conditional types. This release fixes it.
Fixed an issue relating to deprecated parsers (#4072)

`v1.11.0`

`v1.10.2`

Fixed an issue printing .vue files with self-closing tags. (#3705 by duailibe)

`v1.10.1`

Fixed an issue where the CLI fails to resolve a file.

`v1.10.0`

`v1.9.2`

Fixed trailing comma not being printed in function calls if the last arg was an arrow (#3428 by duailibe)
Ignore whitespace after the /** in docblocks (#3430 by duailibe)
Fixed a bug where get and set class properties arrows would print an unnecessary semicolon with --no-semi (#3434 by duailibe)
Fixed a bug for missing .editorconfig files (#3439 by josephfrazier)
Fix comments being moved in class methods and object properties with the babylon parser (#3441 by duailibe)
Better printing of member chains with a TSNonNullExpression (! character) (#3442 by duailibe)
Fix missing commas in object properties when a prettier-ignore comment is present (#3448 by duailibe)
Fix printing union types inside a function param type (#3446 by duailibe)
Fix closing parens on multi-line intersection/union type (#3436 by josephfrazier)
Don't break single argument destructuring arguments (for arrays and with simple default values) (#3443 by duailibe)

`v1.9.1`

Fixed a bug of comments with JSX fragments being duplicated in output (#3398 by duailibe)
Fixed a bug that Prettier would fail when using tabs (#3401 by ikatyang)
Fixed a regression that removed trailing commas when printing JS code blocks in Markdown (#3405 by azz)
Fixed a bug when using glob **/* which would try to format directories (#3411 by duailibe)
Fixed a bug when .editorconfig had max_line_length = "off" (#3412 by duailibe)

`v1.9.0`

`v1.8.2`

Markdown: Don't break on links (#3204 by ikatyang)
Markdown: Add --no-prose-wrap option (#3199 by ikatyang)
TypeScript: Parenthesis around TSAsExpression inside TSAbstractClassDeclaration (#3191 by duailibe)
JSON: Print JSON top comments as leading comments of root node (#3187 by duailibe)

`v1.8.1`

Force JSON to no trailing comma in multiparser (#3182 by azz)
Don't add trailing commas in JSXAttribute for arrow functions (#3181 by duailibe)
Markdown: Allow more cases that _-style emphasis is available (#3186 by ikatyang)
Markdown: Handle additional spaces before code (#3180 by ikatyang)
Markdown: Do not break on unbreakable place (#3177 by ikatyang)
Markdown: Do not break before special prefix (#3172 by ikatyang)

`v1.8.0`

`v1.7.4`

Force template literals to break after ` for styled-components (#2926 by duailibe)
Update cosmiconfig to v3.1.0 (#2952 by ikatyang)
Respect --stdin-filepath, regardless of config source (#2948 by azz)

`v1.7.3`

Fix cosmiconfig in the built version of Prettier (#2930 by lydell)
Fix: ignore and show warning for unknown option from config file (#2929 by ikatyang)
Don't use parens with optional chaining member expressions (#2921 by azz)

`v1.7.2`

Revert "Fix line break in test declarations with a single argument function declaration" (#2912)

`v1.7.1`

Enable cosmiconfig rcExtensions (#2749 by elektronik2k5)
Keep original empty lines in argument list (#2763 by jackyho112)
Upgrade prettier dependency to 1.7.0, fix lint (#2821 by josephfrazier)
Fix different precedence binary expression when inlining (#2827 by duailibe)
Bump Babylon (#2831 by existentialism)
Don't lowercase Less variables when parsed with SCSS parser (#2833 by lydell)
Don't lowercase &class in SCSS/Less selectors (#2834 by lydell)
Add support for ClassPrivateProperty (#2837 by existentialism)
Upgrade cosmiconfig to v3, remove hardcoded combinatorial problem (#2843 by azz)
Split Less and SCSS parsing into different parsers (#2844 by lydell)
feat: support detailed --help (#2847 by ikatyang)
Update cosmiconfig to 3.0.1 to avoid memory leak (#2848 by danez)
chore: add prettier-stylelint to the related projects (#2859 by hugomrdias)
Don't lowercase SCSS placeholder selectors (#2876 by lydell)
Fix line break in test declarations with 2nd argument as a function (#2877 by duailibe)
Use semicolons in Flow interface-like bodies (#2593) (#2888 by motiz88)
We do not need to have a reference to the toolbox-companion since we (#2892 by mitermayer)
fix(cli): validate options for every config-precedence (#2894 by ikatyang)
fix: do not print stack trace for invalid option (#2895 by ikatyang)
refactor: use custom error (#2896 by ikatyang)
fix(typescript): allow symbol type (#2899 by ikatyang)
Support fit(), xit(), it.only(), etc (#2900 by azz)
Fix editor styling on empty editors (#2904 by jakegavin)
Fix printing of comments between decorators and method names (#2906 by azz)

`v1.7.0`

`v1.6.1`

Fix CLI option parsing with no arguments (#2684)
Fix config file finding when using stdin (#2692)
Fix union type with type params regression (#2688)
Fix flow parenthesis regression (#2687)

`v1.6.0`