[pve-eslint.git] / eslint / docs / rules / default-param-last.md

# enforce default parameters to be last (default-param-last)

Putting default parameter at last allows function calls to omit optional tail arguments.

```js
// Correct: optional argument can be omitted
function createUser(id, isAdmin = false) {}
createUser("tabby")

// Incorrect: optional argument can **not** be omitted
function createUser(isAdmin = false, id) {}
createUser(undefined, "tabby")
```

## Rule Details

This rule enforces default parameters to be the last of parameters.

Examples of **incorrect** code for this rule:

```js
/* eslint default-param-last: ["error"] */

function f(a = 0, b) {}

function f(a, b = 0, c) {}
```

Examples of **correct** code for this rule:

```js
/* eslint default-param-last: ["error"] */

function f(a, b = 0) {}
```
Commit	Line	Data
eb39fafa DC	1	# enforce default parameters to be last (default-param-last)
	2
	3	Putting default parameter at last allows function calls to omit optional tail arguments.
	4
	5	```js
	6	// Correct: optional argument can be omitted
	7	function createUser(id, isAdmin = false) {}
	8	createUser("tabby")
	9
	10	// Incorrect: optional argument can not be omitted
	11	function createUser(isAdmin = false, id) {}
	12	createUser(undefined, "tabby")
	13	```
	14
	15	## Rule Details
	16
	17	This rule enforces default parameters to be the last of parameters.
	18
	19	Examples of incorrect code for this rule:
	20
	21	```js
	22	/* eslint default-param-last: ["error"] */
	23
	24	function f(a = 0, b) {}
	25
	26	function f(a, b = 0, c) {}
	27	```
	28
	29	Examples of correct code for this rule:
	30
	31	```js
	32	/* eslint default-param-last: ["error"] */
	33
	34	function f(a, b = 0) {}
	35	```