59 lines
1.2 KiB
Plaintext
59 lines
1.2 KiB
Plaintext
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---
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description: 'Enforce default parameters to be last.'
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---
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> 🛑 This file is source code, not the primary documentation location! 🛑
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>
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> See **https://typescript-eslint.io/rules/default-param-last** for documentation.
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This rule extends the base [`eslint/default-param-last`](https://eslint.org/docs/rules/default-param-last) rule.
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It adds support for optional parameters.
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<!--tabs-->
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### ❌ Incorrect
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```ts
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/* eslint @typescript-eslint/default-param-last: "error" */
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function f(a = 0, b: number) {}
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function f(a: number, b = 0, c: number) {}
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function f(a: number, b?: number, c: number) {}
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class Foo {
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constructor(
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public a = 10,
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private b: number,
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) {}
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}
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class Foo {
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constructor(
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public a?: number,
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private b: number,
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) {}
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}
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```
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### ✅ Correct
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```ts
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/* eslint @typescript-eslint/default-param-last: "error" */
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function f(a = 0) {}
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function f(a: number, b = 0) {}
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function f(a: number, b?: number) {}
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function f(a: number, b?: number, c = 0) {}
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function f(a: number, b = 0, c?: number) {}
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class Foo {
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constructor(
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public a,
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private b = 0,
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) {}
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}
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class Foo {
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constructor(
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public a,
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private b?: number,
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) {}
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}
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```
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