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Eslint参考手册

规则 | Rules

max-statements

max-statements规则允许您指定函数中允许的最大语句数。

function foo() {
  var bar = 1; // one statement
  var baz = 2; // two statements
  var qux = 3; // three statements
}

规则细节

此规则强制实现功能块中允许的最大数量的语句。

选项

此规则有一个数字或对象选项:

  • "max"(默认值10)强制允许在功能块中允许的最大语句数量不推荐使用:maximum不推荐使用对象属性; 请改用对象属性max。此规则有一个对象选项:
  • "ignoreTopLevelFunctions": true 忽略顶层函数

max

此规则的默认代码错误代码示例{ "max": 10 }

/*eslint max-statements: ["error", 10]*/
/*eslint-env es6*/

function foo() {
  var foo1 = 1;
  var foo2 = 2;
  var foo3 = 3;
  var foo4 = 4;
  var foo5 = 5;
  var foo6 = 6;
  var foo7 = 7;
  var foo8 = 8;
  var foo9 = 9;
  var foo10 = 10;

  var foo11 = 11; // Too many.
}

let foo = () => {
  var foo1 = 1;
  var foo2 = 2;
  var foo3 = 3;
  var foo4 = 4;
  var foo5 = 5;
  var foo6 = 6;
  var foo7 = 7;
  var foo8 = 8;
  var foo9 = 9;
  var foo10 = 10;

  var foo11 = 11; // Too many.
};

具有默认选项的此规则的正确代码示例{ "max": 10 }

/*eslint max-statements: ["error", 10]*/
/*eslint-env es6*/

function foo() {
  var foo1 = 1;
  var foo2 = 2;
  var foo3 = 3;
  var foo4 = 4;
  var foo5 = 5;
  var foo6 = 6;
  var foo7 = 7;
  var foo8 = 8;
  var foo9 = 9;
  var foo10 = 10;
  return function () {

    // The number of statements in the inner function does not count toward the
    // statement maximum.

    return 42;
  };
}

let foo = () => {
  var foo1 = 1;
  var foo2 = 2;
  var foo3 = 3;
  var foo4 = 4;
  var foo5 = 5;
  var foo6 = 6;
  var foo7 = 7;
  var foo8 = 8;
  var foo9 = 9;
  var foo10 = 10;
  return function () {

    // The number of statements in the inner function does not count toward the
    // statement maximum.

    return 42;
  };
}

ignoreTopLevelFunctions

此规则的附加正确代码示例包含以下{ "max": 10 }, { "ignoreTopLevelFunctions": true }选项:

/*eslint max-statements: ["error", 10, { "ignoreTopLevelFunctions": true }]*/

function foo() {
  var foo1 = 1;
  var foo2 = 2;
  var foo3 = 3;
  var foo4 = 4;
  var foo5 = 5;
  var foo6 = 6;
  var foo7 = 7;
  var foo8 = 8;
  var foo9 = 9;
  var foo10 = 10;
  var foo11 = 11;
}

相关规则

  • complexity
  • max-depth
  • max-len
  • max-nested-callbacks
  • max-params

版本

规则在ESLint 0.0.9中引入。

资源

  • 规则来源
  • 文档来源

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.getter-return
39.global-require
40.global-strict
41.guard-for-in
42.handle-callback-err
43.id-blacklist
44.id-length
45.id-match
46.implicit-arrow-linebreak
47.indent
48.indent-legacy
49.init-declarations
50.jsx-quotes
51.key-spacing
52.keyword-spacing
53.line-comment-position
54.linebreak-style
55.lines-around-comment
56.lines-around-directive
57.lines-between-class-members
58.max-depth
59.max-len
60.max-lines
61.max-nested-callbacks
62.max-params
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