eslint-插件，流動型不驗證

我想配置eslint + babel-eslint + eslint-plugin-react + eslint-plugin-flowtypeeslint-插件，流動型不驗證

devDependencies在package.json我有以下幾點：

"babel-eslint": "^7.1.1", 
"eslint": "^3.10.2", 
"eslint-config-airbnb": "^13.0.0", 
"eslint-plugin-flowtype": "^2.25.0", 
"eslint-plugin-import": "^2.2.0", 
"eslint-plugin-jsx-a11y": "^2.2.3", 
"eslint-plugin-react": "^6.7.1"

而下面.eslinrc：

{ 
    "parser": "babel-eslint", 
    "plugins": [ 
    "flowtype" 
    ], 
    "extends": [ 
    "airbnb", 
    "plugin:flowtype/recommended" 
    ], 
    "rules": { 
    "max-len": [1, 80, 2, {"ignoreComments": true}], 
    "prop-types": [0], 
    "react/jsx-filename-extension": [1, { "extensions": [".js", ".jsx"] }], 
    "react/prefer-stateless-function": [ 
     0, 
     { 
     "ignorePureComponents": true 
     } 
    ], 
    "no-console": 0 
    }, 
    "settings": { 
    "flowtype": { 
     "onlyFilesWithFlowAnnotation": true 
    } 
    } 
}

我寫的簡單代碼示例App.js：

function foo() { 
    const a: string = 1; 
    return a; 
} 

async function bar() { 
    const b = await foo(); 
    return b; 
}

如果我啓動eslint src/App.js，則eslint不顯示任何消息。如果我然後添加到"flowtype/require-return-type": 2.eslintrceslint顯示：

error Missing return type annotation flowtype/require-return-type 
error Missing return type annotation flowtype/require-return-type 
✖ 2 problems (2 errors, 0 warnings)

但我不明白爲什麼const a: string = 1;是有效的。如何啓用檢查類型const a: string = 1;？

來源

2016-11-23 Ilya Z.