prettier-plugin-space-before-function-paren
Advanced tools
A prettier plugin to add a space before function parentheses for function definitions (but not function calls) in JS and TS. **Requires Prettier 3.0.0 or later.**
A prettier plugin to add a space before function parentheses for function definitions (but not function calls) in JS and TS. Requires Prettier 3.0.0 or later.
npm install -D prettier prettier-plugin-space-before-function-paren
There are no config options for this plugin. All you need to do is actually include it in your Prettier config:
{
"plugins": ["prettier-plugin-space-before-function-paren"]
}
[!IMPORTANT] Due to Prettier limitations, to use this plugin with other plugins formatting JS/TS code, install the prettier-plugin-merge plugin and add it to the end of your
pluginsarray. This plugin will be used last and preserve changes made by the previous plugins.
function test(a, b) {
return a + b;
}
becomes:
function test (a, b) {
return a + b;
}
async function test(a, b) {
return a + b;
}
becomes:
async function test (a, b) {
return a + b;
}
const foo = {
method(a, b) {
return a + b;
}
};
becomes:
const foo = {
method (a, b) {
return a + b;
}
};
const foo = {
async method(a, b) {
return a + b;
}
};
becomes:
const foo = {
async method (a, b) {
return a + b;
}
};
const foo = {
[methodName]() {
return 42;
}
};
becomes:
const foo = {
[methodName] () {
return 42;
}
};
const foo = {
get foo() {
return true;
}
};
becomes:
const foo = {
get foo () {
return true;
}
};
const foo = {
set foo(value) {
this._foo = value;
}
};
becomes:
const foo = {
set foo (value) {
this._foo = value;
}
};
class Foo {
constructor(a, b) {
this.a = a;
this.b = b;
}
}
becomes:
class Foo {
constructor (a, b) {
this.a = a;
this.b = b;
}
}
class Foo {
method(a, b) {
return a + b;
}
}
becomes:
class Foo {
method (a, b) {
return a + b;
}
}
class Foo {
#method(a, b) {
return a + b;
}
}
becomes:
class Foo {
#method (a, b) {
return a + b;
}
}
class Foo {
async method(a, b) {
return a + b;
}
}
becomes:
class Foo {
async method (a, b) {
return a + b;
}
}
class Foo {
async #method(a, b) {
return a + b;
}
}
becomes:
class Foo {
async #method (a, b) {
return a + b;
}
}
class Foo {
[methodName]() {
return 42;
}
}
becomes:
class Foo {
[methodName] () {
return 42;
}
}
class Foo {
static method(a, b) {
return a + b;
}
}
becomes:
class Foo {
static method (a, b) {
return a + b;
}
}
class Foo {
static #method(a, b) {
return a + b;
}
}
becomes:
class Foo {
static #method (a, b) {
return a + b;
}
}
class Foo {
get foo() {
return true;
}
}
becomes:
class Foo {
get foo () {
return true;
}
}
class Foo {
get #foo() {
return true;
}
}
becomes:
class Foo {
get #foo () {
return true;
}
}
class Foo {
set foo(value) {
this._foo = value;
}
}
becomes:
class Foo {
set foo (value) {
this._foo = value;
}
}
class Foo {
set #foo(value) {
this._foo = value;
}
}
becomes:
class Foo {
set #foo (value) {
this._foo = value;
}
}
function* test() {
yield 1;
}
becomes:
function* test () {
yield 1;
}
export function test(a, b) {
return a + b;
}
becomes:
export function test (a, b) {
return a + b;
}
export default function test(a, b) {
return a + b;
}
becomes:
export default function test (a, b) {
return a + b;
}
export async function test(a, b) {
return a + b;
}
becomes:
export async function test (a, b) {
return a + b;
}
export function* test() {
yield 1;
}
becomes:
export function* test () {
yield 1;
}
test(1, 2);
becomes:
test(1, 2);
const add = (a, b) => a + b;
becomes:
const add = (a, b) => a + b;
Prettier already handles this case.
const add = function(a, b) {
return a + b;
};
becomes:
const add = function (a, b) {
return a + b;
};
function test(a: number, b: number): number {
return a + b;
}
becomes:
function test (a: number, b: number): number {
return a + b;
}
async function test(a: number, b: number): Promise<number> {
return a + b;
}
becomes:
async function test (a: number, b: number): Promise<number> {
return a + b;
}
const foo = {
method(a: number, b: number): number {
return a + b;
}
};
becomes:
const foo = {
method (a: number, b: number): number {
return a + b;
}
};
const foo = {
async method(a: number, b: number): Promise<number> {
return a + b;
}
};
becomes:
const foo = {
async method (a: number, b: number): Promise<number> {
return a + b;
}
};
const foo = {
get foo(): boolean {
return true;
}
};
becomes:
const foo = {
get foo (): boolean {
return true;
}
};
const foo = {
set foo(value: boolean) {
this._foo = value;
}
};
becomes:
const foo = {
set foo (value: boolean) {
this._foo = value;
}
};
class Foo {
constructor(a: number, b: number) {
this.a = a;
this.b = b;
}
}
becomes:
class Foo {
constructor (a: number, b: number) {
this.a = a;
this.b = b;
}
}
class Foo {
method(a: number, b: number): number {
return a + b;
}
}
becomes:
class Foo {
method (a: number, b: number): number {
return a + b;
}
}
class Foo {
async method(a: number, b: number): Promise<number> {
return a + b;
}
}
becomes:
class Foo {
async method (a: number, b: number): Promise<number> {
return a + b;
}
}
class Foo {
static method(a: number, b: number): number {
return a + b;
}
}
becomes:
class Foo {
static method (a: number, b: number): number {
return a + b;
}
}
abstract class Foo {
abstract method(a: number, b: number): number;
}
becomes:
abstract class Foo {
abstract method (a: number, b: number): number;
}
class Foo {
private method(a: number, b: number): number {
return a + b;
}
}
becomes:
class Foo {
private method (a: number, b: number): number {
return a + b;
}
}
class Foo {
#method(a: number, b: number): number {
return a + b;
}
}
becomes:
class Foo {
#method (a: number, b: number): number {
return a + b;
}
}
class Foo {
protected method(a: number, b: number): number {
return a + b;
}
}
becomes:
class Foo {
protected method (a: number, b: number): number {
return a + b;
}
}
class Foo {
public method(a: number, b: number): number {
return a + b;
}
}
becomes:
class Foo {
public method (a: number, b: number): number {
return a + b;
}
}
class Foo {
method?(a: number, b: number): number {
return a + b;
}
}
becomes:
class Foo {
method? (a: number, b: number): number {
return a + b;
}
}
class Foo {
get foo(): boolean {
return true;
}
}
becomes:
class Foo {
get foo (): boolean {
return true;
}
}
class Foo {
get #foo(): boolean {
return true;
}
}
becomes:
class Foo {
get #foo (): boolean {
return true;
}
}
class Foo {
set foo(value: boolean) {
this._foo = value;
}
}
becomes:
class Foo {
set foo (value: boolean) {
this._foo = value;
}
}
class Foo {
set #foo(value: boolean) {
this._foo = value;
}
}
becomes:
class Foo {
set #foo (value: boolean) {
this._foo = value;
}
}
class Foo {
[methodName](): void {
return;
}
}
becomes:
class Foo {
[methodName] (): void {
return;
}
}
class Foo {
method<T>(a: T): T {
return a;
}
}
becomes:
class Foo {
method<T> (a: T): T {
return a;
}
}
function* test(): Generator<number> {
yield 1;
}
becomes:
function* test (): Generator<number> {
yield 1;
}
interface Foo {
method(a: number, b: number): number;
}
becomes:
interface Foo {
method (a: number, b: number): number;
}
function foo<T>(arg: T): T {
return arg;
}
becomes:
function foo<T> (arg: T): T {
return arg;
}
export function test(a: number, b: number): number {
return a + b;
}
becomes:
export function test (a: number, b: number): number {
return a + b;
}
export default function test(a: number, b: number): number {
return a + b;
}
becomes:
export default function test (a: number, b: number): number {
return a + b;
}
export async function test(a: number, b: number): Promise<number> {
return a + b;
}
becomes:
export async function test (a: number, b: number): Promise<number> {
return a + b;
}
export function* test(): Generator<number> {
yield 1;
}
becomes:
export function* test (): Generator<number> {
yield 1;
}
declare namespace Foo {
export function test(a: number, b: number): number;
}
becomes:
declare namespace Foo {
export function test (a: number, b: number): number;
}
type MethodType = {
method(): void;
};
becomes:
type MethodType = {
method (): void;
};
test<number>(1, 2);
becomes:
test<number>(1, 2);
const add = (a: number, b: number): number => a + b;
becomes:
const add = (a: number, b: number): number => a + b;
Prettier already handles this case.
const add = function(a: number, b: number): number {
return a + b;
};
becomes:
const add = function (a: number, b: number): number {
return a + b;
};
type NumberCallback = (x: number) => number;
becomes:
type NumberCallback = (x: number) => number;
type Func = { (a: string): number };
becomes:
type Func = { (a: string): number };
let a = { value: null, prev: null, next: null as never };
becomes:
let a = { value: null, prev: null, next: null as never };
Current version is a proof of concept, please try it out and give feedback!
Things not handled yet:
FAQs
A prettier plugin to add a space before function parentheses for function definitions (but not function calls) in JS and TS. **Requires Prettier 3.0.0 or later.**
The npm package prettier-plugin-space-before-function-paren receives a total of 1,207 weekly downloads. As such, prettier-plugin-space-before-function-paren popularity was classified as popular.
We found that prettier-plugin-space-before-function-paren demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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