非常教程

Eslint参考手册

规则 | Rules

quotes

--fix命令行上的选项可以自动修复一些被这条规则反映的问题。

JavaScript 允许你以三种方式之一定义字符串:双引号,单引号和反引号(从 ECMAScript 6开始)。例如:

/*eslint-env es6*/

var double = "double";
var single = 'single';
var backtick = `backtick`;    // ES6 only

这些行中的每一行都会创建一个字符串,并且在某些情况下可以互换使用。如何在代码库中定义字符串的选择是模板文字之外的一种文体(它允许解释表达式的嵌入)。

许多代码库需要以一致的方式定义字符串。

规则细节

此规则强制一致使用反引号,双引号或单引号。

选项

该规则有两个选项,一个字符串选项和一个对象选项。

字符串选项:

  • "double" (默认)需要尽可能使用双引号
  • "single" 尽可能要求使用单引号
  • "backtick" 需要尽可能使用反引号

对象选项:

  • "avoidEscape": true 允许字符串使用单引号或双引号,只要字符串包含必须以其他方式转义的引号
  • "allowTemplateLiterals": true 允许字符串使用反引号

已弃用:对象属性avoid-escape已弃用;请改用对象属性avoidEscape

double

此规则的默认代码错误代码示例"double"

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

var single = 'single';
var unescaped = 'a string containing "double" quotes';
var backtick = `back\ntick`; // you can use \n in single or double quoted strings

具有默认"double"选项的此规则的正确代码示例:

/*eslint quotes: ["error", "double"]*/
/*eslint-env es6*/

var double = "double";
var backtick = `back
tick`;  // backticks are allowed due to newline
var backtick = tag`backtick`; // backticks are allowed due to tag

single

此规则的错误代码示例包含以下"single"选项:

/*eslint quotes: ["error", "single"]*/

var double = "double";
var unescaped = "a string containing 'single' quotes";

此规则的正确代码示例包含以下"single"选项:

/*eslint quotes: ["error", "single"]*/
/*eslint-env es6*/

var single = 'single';
var backtick = `back${x}tick`; // backticks are allowed due to substitution

backticks

此规则的错误代码示例包含以下"backtick"选项:

/*eslint quotes: ["error", "backtick"]*/

var single = 'single';
var double = "double";
var unescaped = 'a string containing `backticks`';

此规则的正确代码示例包含以下"backtick"选项:

/*eslint quotes: ["error", "backtick"]*/
/*eslint-env es6*/

var backtick = `backtick`;

avoidEscape

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

/*eslint quotes: ["error", "double", { "avoidEscape": true }]*/

var single = 'a string containing "double" quotes';

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

/*eslint quotes: ["error", "single", { "avoidEscape": true }]*/

var double = "a string containing 'single' quotes";

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

/*eslint quotes: ["error", "backtick", { "avoidEscape": true }]*/

var double = "a string containing `backtick` quotes"

allowTemplateLiterals

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

/*eslint quotes: ["error", "double", { "allowTemplateLiterals": true }]*/

var double = "double";
var double = `double`;

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

/*eslint quotes: ["error", "single", { "allowTemplateLiterals": true }]*/

var single = 'single';
var single = `single`;

何时不使用它

如果您不需要字符串样式的一致性,则可以安全地禁用此规则。

版本

该规则在 ESLint 0.0.7中引入。

资源

  • 规则资源
  • 文档资源

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
64.max-statements-per-line
65.multiline-comment-style
66.multiline-ternary
67.new-cap
68.new-parens
69.newline-after-var
70.newline-before-return
71.newline-per-chained-call
72.no-alert
73.no-array-constructor
74.no-arrow-condition
75.no-await-in-loop
76.no-bitwise
77.no-buffer-constructor
78.no-caller
79.no-case-declarations
80.no-catch-shadow
81.no-class-assign
82.no-comma-dangle
83.no-compare-neg-zero
84.no-cond-assign
85.no-confusing-arrow
86.no-console
87.no-const-assign
88.no-constant-condition
89.no-continue
90.no-control-regex
91.no-debugger
92.no-delete-var
93.no-div-regex
94.no-dupe-args
95.no-dupe-class-members
96.no-dupe-keys
97.no-duplicate-case
98.no-duplicate-imports
99.no-else-return
100.no-empty
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