ESLint：eslintrc文件中出现意外的"indent"属性

Question

如此处所述，ESLint有一个关于缩进的属性叫做indent。示例代码如下：

Or for tabbed indentation:

{
    "indent": ["error", "tab"]
}

然而，如果我将这段代码粘贴到我的.eslintrc文件中，VS Code会提示出错：

ESLint: ESLint configuration in .eslintrc is invalid: - Unexpected top-level property "indent". . Please see the 'ESLint' output channel for details.

我之前的.eslintrc文件已经有一些规则，没有打印出任何错误信息。如果我将"indent"添加到该列表中或者单独使用它，就会失败。

以下是在VS Code的ESLint输出通道中打印的错误和堆栈跟踪：

[Error - 10:38:55 PM] ESLint stack trace:
[Error - 10:38:55 PM] Error: ESLint configuration in .eslintrc is invalid:
    - Unexpected top-level property "indent".
    at validateConfigSchema (/home/aaronfranke/workspace/OddJobs/node_modules/eslint/lib/shared/config-validator.js:286:15)
    at ConfigArrayFactory._normalizeConfigData (/home/aaronfranke/workspace/OddJobs/node_modules/eslint/lib/cli-engine/config-array-factory.js:469:9)
    at ConfigArrayFactory._loadConfigDataInDirectory (/home/aaronfranke/workspace/OddJobs/node_modules/eslint/lib/cli-engine/config-array-factory.js:445:33)
    at ConfigArrayFactory.loadInDirectory (/home/aaronfranke/workspace/OddJobs/node_modules/eslint/lib/cli-engine/config-array-factory.js:401:18)
    at CascadingConfigArrayFactory._loadConfigInAncestors (/home/aaronfranke/workspace/OddJobs/node_modules/eslint/lib/cli-engine/cascading-config-array-factory.js:305:46)
    at CascadingConfigArrayFactory.getConfigArrayForFile (/home/aaronfranke/workspace/OddJobs/node_modules/eslint/lib/cli-engine/cascading-config-array-factory.js:250:18)
    at CLIEngine.executeOnText (/home/aaronfranke/workspace/OddJobs/node_modules/eslint/lib/cli-engine/cli-engine.js:860:47)
    at /home/aaronfranke/.vscode/extensions/dbaeumer.vscode-eslint-1.9.1/server/out/eslintServer.js:1:60107
    at /home/aaronfranke/.vscode/extensions/dbaeumer.vscode-eslint-1.9.1/server/out/eslintServer.js:1:61116

发生了什么？这个选项不可用吗？示例配置有误吗？我的ESLint扩展有问题吗？VS Code有问题吗？我正在使用Ubuntu 18.04 Linux 64位操作系统，VS Code 1.40.1版本，ESLint扩展1.9.1版本，eslint --version的输出是v5.16.0。

- Aaron Franke

Answer 1

不允许将此设置作为顶级属性，这意味着它必须嵌套在另一个属性中，即"rules"。因此，您必须按以下方式编写:

{
    //... other stuff ...

    "rules": {
        "indent": [ "error", "tab" ]
    }
}

- John Archer