Require space before/after arrow function’s arrow (arrow-spacing)

要求箭头函数的箭头之前或之后有空格 (arrow-spacing)

The --fix option on the command line can automatically fix some of the problems reported by this rule.

命令行中的 --fix 选项可以自动修复一些该规则报告的问题。

This rule normalize style of spacing before/after an arrow function’s arrow(=>).

该该规则规范化箭头函数的箭头(=>)之前或之后的空格风格。

/*eslint-env es6*/

// { "before": true, "after": true }
(a) => {}

// { "before": false, "after": false }
(a)=>{}

Rule Details

This rule takes an object argument with before and after properties, each with a Boolean value.

该规则有一个对象参数,属性为beforeafter,对应的值为布尔类型的值。

The default configuration is { "before": true, "after": true }.

默认配置为 { "before": true, "after": true }

true means there should be one or more spaces and false means no spaces.

true 意味着应该有 一个或多个空格false意味着 没有空格

Examples of incorrect code for this rule with the default { "before": true, "after": true } option:

默认选项 { "before": true, "after": true }错误 代码示例:

/*eslint arrow-spacing: "error"*/
/*eslint-env es6*/

()=> {};
() =>{};
(a)=> {};
(a) =>{};
a =>a;
a=> a;
()=> {'\n'};
() =>{'\n'};

Examples of correct code for this rule with the default { "before": true, "after": true } option:

默认选项 { "before": true, "after": true }正确 代码示例:

/*eslint arrow-spacing: "error"*/
/*eslint-env es6*/

() => {};
(a) => {};
a => a;
() => {'\n'};

Examples of incorrect code for this rule with the { "before": false, "after": false } option:

选项 { "before": false, "after": false }错误 代码示例:

/*eslint arrow-spacing: ["error", { "before": false, "after": false }]*/
/*eslint-env es6*/

() =>{};
(a) => {};
()=> {'\n'};

Examples of correct code for this rule with the { "before": false, "after": false } option:

选项 { "before": false, "after": false }正确 代码示例:

/*eslint arrow-spacing: ["error", { "before": false, "after": false }]*/
/*eslint-env es6*/

()=>{};
(a)=>{};
()=>{'\n'};

Examples of incorrect code for this rule with the { "before": false, "after": true } option:

选项 { "before": false, "after": true }错误 代码示例:

/*eslint arrow-spacing: ["error", { "before": false, "after": true }]*/
/*eslint-env es6*/

() =>{};
(a) => {};
()=>{'\n'};

Examples of correct code for this rule with the { "before": false, "after": true } option:

选项 { "before": false, "after": true }正确 代码示例:

/*eslint arrow-spacing: ["error", { "before": false, "after": true }]*/
/*eslint-env es6*/

()=> {};
(a)=> {};
()=> {'\n'};

Version

This rule was introduced in ESLint 1.0.0-rc-1.

该规则在 ESLint 1.0.0-rc-1 中被引入。

Resources


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