非常教程

Eslint参考手册

规则 | Rules

getter-return

get 语法将一个对象属性绑定到一个函数,该函数将在查找该属性时被调用。它首先在 ECMAScript 5 中引入:

var p = {
        get name(){
            return "nicholas";
        }
    };

    Object.defineProperty(p, "age", {
        get: function (){
            return 17;
        }
    });

请注意,每个getter预期都会返回一个值。

规则细节

该规则强制在属性获取器中存在返回语句。

此规则的错误代码示例:

/*eslint getter-return: "error"*/

p = {
    get name(){
        // no returns.
    }
};

Object.defineProperty(p, "age", {
    get: function (){
        // no returns.
    }
});

class P{
    get name(){
        // no returns.
    }
}

此规则的正确代码示例:

/*eslint getter-return: "error"*/

p = {
    get name(){
        return "nicholas";
    }
};

Object.defineProperty(p, "age", {
    get: function (){
        return 18;
    }
});

class P{
    get name(){
        return "nicholas";
    }
}

选项

该规则有一个对象选项:

  • "allowImplicit": false(默认)不允许隐式返回未定义的返回; 声明。

选项的正确代码示例{ "allowImplicit": true }

/*eslint getter-return: ["error", { allowImplicit: true }]*/
p = {
    get name(){
        return; // return undefined implicitly.
    }
};

何时不使用它

如果您的项目不使用 ES5 属性获取器,则不需要此规则。

进一步阅读

  • MDN: Functions getter
  • Understanding ES6: Accessor Properties

版本

这条规则是在 ESLint 4.2.0 中引入的。

资源

  • Rule source
  • Documentation source

规则 | Rules相关

1.accessor-pairs
2.array-bracket-newline
3.array-bracket-spacing
4.array-callback-return
5.array-element-newline
6.arrow-body-style
7.arrow-parens
8.arrow-spacing
9.block-scoped-var
10.block-spacing
11.brace-style
12.callback-return
13.camelcase
14.capitalized-comments
15.class-methods-use-this
16.comma-dangle
17.comma-spacing
18.comma-style
19.complexity
20.computed-property-spacing
21.consistent-return
22.consistent-this
23.constructor-super
24.curly
25.default-case
26.dot-location
27.dot-notation
28.eol-last
29.eqeqeq
30.for-direction
31.func-call-spacing
32.func-name-matching
33.func-names
34.func-style
35.function-paren-newline
36.generator-star
37.generator-star-spacing
38.global-require
39.global-strict
40.guard-for-in
41.handle-callback-err
42.id-blacklist
43.id-length
44.id-match
45.implicit-arrow-linebreak
46.indent
47.indent-legacy
48.init-declarations
49.jsx-quotes
50.key-spacing
51.keyword-spacing
52.line-comment-position
53.linebreak-style
54.lines-around-comment
55.lines-around-directive
56.lines-between-class-members
57.max-depth
58.max-len
59.max-lines
60.max-nested-callbacks
61.max-params
62.max-statements
63.max-statements-per-line
64.multiline-comment-style
65.multiline-ternary
66.new-cap
67.new-parens
68.newline-after-var
69.newline-before-return
70.newline-per-chained-call
71.no-alert
72.no-array-constructor
73.no-arrow-condition
74.no-await-in-loop
75.no-bitwise
76.no-buffer-constructor
77.no-caller
78.no-case-declarations
79.no-catch-shadow
80.no-class-assign
81.no-comma-dangle
82.no-compare-neg-zero
83.no-cond-assign
84.no-confusing-arrow
85.no-console
86.no-const-assign
87.no-constant-condition
88.no-continue
89.no-control-regex
90.no-debugger
91.no-delete-var
92.no-div-regex
93.no-dupe-args
94.no-dupe-class-members
95.no-dupe-keys
96.no-duplicate-case
97.no-duplicate-imports
98.no-else-return
99.no-empty
100.no-empty-character-class
Eslint

ESLint 是一个代码规范和错误检查工具,有以下几个特性。所有东西都是可以插拔的。你可以调用任意的 rule api 或者 formatter api 去打包或者定义 rule or formatter。任意的 rule 都是独立的。没有特定的 coding style,你可以自己配置。

主页 https://eslint.org/
源码 https://github.com/eslint/eslint
发布版本 4.12.0

Eslint目录

1.指南 | Guide
2.规则 | Rules