配置规则

规则是 ESLint 的核心构建块。规则验证您的代码是否满足特定期望，以及如果不满足该期望该怎么办。规则还可以包含特定于该规则的其他配置选项。

ESLint 自带大量的内置规则，你可以通过插件添加更多的规则。您可以使用配置注释或配置文件修改您的项目使用的规则。

规则严重性

要更改规则的严重性，请将规则 ID 设置为以下值之一：

"off" 或 0 - 关闭规则
"warn" 或 1 - 打开规则作为警告（不影响退出代码）
"error" 或 2 - 打开规则作为错误（触发时退出代码为 1）

规则通常设置为 "error"，以在持续集成测试、预提交检查和拉取请求合并期间强制遵守规则，因为这样做会导致 ESLint 以非零退出代码退出。

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使用配置注释

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/* eslint eqeqeq: "off", curly: "error" */

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/* eslint eqeqeq: 0, curly: 2 */

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/* eslint quotes: ["error", "double"], curly: 2 */

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配置注释描述

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/* eslint eqeqeq: "off", curly: "error" -- Here's a description about why this configuration is necessary. */

/* eslint eqeqeq: "off", curly: "error"
    --------
    Here's a description about why this configuration is necessary. */

/* eslint eqeqeq: "off", curly: "error"
 * --------
 * This will not work due to the line above starting with a '*' character.
 */

使用配置文件

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{
    "rules": {
        "eqeqeq": "off",
        "curly": "error",
        "quotes": ["error", "double"]
    }
}

lObsq6aAiA8MkzIPYrFeAw==

---
rules:
  eqeqeq: off
  curly: error
  quotes:
    - error
    - double

来自插件的规则

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HSCgdjey2XDclPo7p3c8/4WVary9nmESwQ8ry3/sM6Y=

{
    "plugins": [
        "plugin1"
    ],
    "rules": {
        "eqeqeq": "off",
        "curly": "error",
        "quotes": ["error", "double"],
        "plugin1/rule1": "error"
    }
}

lObsq6aAiA8MkzIPYrFeAw==

---
plugins:
  - plugin1
rules:
  eqeqeq: 0
  curly: error
  quotes:
    - error
    - "double"
  plugin1/rule1: error

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/* eslint "plugin1/rule1": "error" */

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禁用规则

使用配置注释

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/* eslint-disable */

alert('foo');

/* eslint-enable */

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/* eslint-disable no-alert, no-console */

alert('foo');
console.log('bar');

/* eslint-enable no-alert, no-console */

4y/020zCKZw9AYAGpZ/mLVf8yTPJME+sdHZ7JxYpfMhekrZd0pKone9ZvTw9hKyFQzK5ceIVBjPgpQeNtdP9CrOXQ7bpHWGbub8pL9eXlqFvFwzRCdReH11pz047bVw6pPus90HeuoOwVdTAGozb3EhLU6KNhl1pZU2TjagoAm0DO1lBqPr4bHo+wW8kTLMG

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/* eslint-disable */

alert('foo');

/TLaSYPZl8Cjv+KFeMweCH50merI1C9VYGl0AtAWKTa6dVhBHLtdcmGGWgu+90/8S/e69yTFDtftykNVC0Nsdw==

/* eslint-disable no-alert */

alert('foo');

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/* eslint no-alert: "off" */

alert('foo');

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alert('foo'); // eslint-disable-line

// eslint-disable-next-line
alert('foo');

/* eslint-disable-next-line */
alert('foo');

alert('foo'); /* eslint-disable-line */

JN32/00iEYRA6g9RoyzrsSX3QAudIh3HZTLBz2Mlwx2Dd8Tq8ratPzUFhatp14oh

alert('foo'); // eslint-disable-line no-alert

// eslint-disable-next-line no-alert
alert('foo');

alert('foo'); /* eslint-disable-line no-alert */

/* eslint-disable-next-line no-alert */
alert('foo');

JN32/00iEYRA6g9RoyzrsWtEPs+tv/IA5VneogMmzQpnQxbf83AMcFEJtHYSijv7

alert('foo'); // eslint-disable-line no-alert, quotes, semi

// eslint-disable-next-line no-alert, quotes, semi
alert('foo');

alert('foo'); /* eslint-disable-line no-alert, quotes, semi */

/* eslint-disable-next-line no-alert, quotes, semi */
alert('foo');

/* eslint-disable-next-line
  no-alert,
  quotes,
  semi
*/
alert('foo');

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foo(); // eslint-disable-line example/rule-name
foo(); /* eslint-disable-line example/rule-name */

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注释描述

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// eslint-disable-next-line no-console -- Here's a description about why this configuration is necessary.
console.log('hello');

/* eslint-disable-next-line no-console --
 * Here's a very long description about why this configuration is necessary
 * along with some additional information
**/
console.log('hello');

使用配置文件

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{
  "rules": {...},
  "overrides": [
    {
      "files": ["*-test.js","*.spec.js"],
      "rules": {
        "no-unused-expressions": "off"
      }
    }
  ]
}

禁用内联注释

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{
  "rules": {...},
  "noInlineConfig": true
}

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报告未使用的 eslint-disable 注释

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{
  "rules": {...},
  "reportUnusedDisableDirectives": true
}

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