default-param-last

Enforce default parameters to be last.

此规则扩展了基本 eslint/default-param-last 规则。 它增加了对可选参数的支持。

英：This rule extends the base eslint/default-param-last rule. It adds support for optional parameters.

❌ 不正确

/* eslint @typescript-eslint/default-param-last: "error" */

function f(a = 0, b: number) {}
function f(a: number, b = 0, c: number) {}
function f(a: number, b?: number, c: number) {}
class Foo {
  constructor(
    public a = 10,
    private b: number,
  ) {}
}
class Foo {
  constructor(
    public a?: number,
    private b: number,
  ) {}
}

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✅ 正确

/* eslint @typescript-eslint/default-param-last: "error" */

function f(a = 0) {}
function f(a: number, b = 0) {}
function f(a: number, b?: number) {}
function f(a: number, b?: number, c = 0) {}
function f(a: number, b = 0, c?: number) {}
class Foo {
  constructor(
    public a,
    private b = 0,
  ) {}
}
class Foo {
  constructor(
    public a,
    private b?: number,
  ) {}
}

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如何使用

.eslintrc.cjs

module.exports = {
  "rules": {
    // Note: you must disable the base rule as it can report incorrect errors
    "default-param-last": "off",
    "@typescript-eslint/default-param-last": "error"
  }
};

在线运行试试这个规则 ↗

选项

参见 eslint/default-param-last 选项。

资源

• 规则源码
• 测试源码

^{摘自 ❤️ ESLint 内核}