arrow-spacing

在箭头函数中的箭头前后强制执行一致的间距

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此规则报告的一些问题可通过 --fix 命令行 选项自动修复

Important

This rule was deprecated in ESLint v8.53.0. Please use the corresponding rule in @stylistic/eslint-plugin-js.

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此规则规范了箭头函数的箭头（=>）之前/之后的间距样式。

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

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

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

规则详情

¥Rule Details

此规则采用具有 before 和 after 属性的对象参数，每个属性都有一个布尔值。

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

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

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

true 表示应该有一个或多个空格，false 表示没有空格。

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

使用默认 { "before": true, "after": true } 选项的此规则的错误代码示例：

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

在线运行 
/*eslint arrow-spacing: "error"*/

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

使用默认 { "before": true, "after": true } 选项的此规则的正确代码示例：

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

在线运行 
/*eslint arrow-spacing: "error"*/

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

使用 { "before": false, "after": false } 选项的此规则的错误代码示例：

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

在线运行 
/*eslint arrow-spacing: ["error", { "before": false, "after": false }]*/

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

使用 { "before": false, "after": false } 选项的此规则的正确代码示例：

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

在线运行 
/*eslint arrow-spacing: ["error", { "before": false, "after": false }]*/

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

使用 { "before": false, "after": true } 选项的此规则的错误代码示例：

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

在线运行 
/*eslint arrow-spacing: ["error", { "before": false, "after": true }]*/

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

使用 { "before": false, "after": true } 选项的此规则的正确代码示例：

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

在线运行 
/*eslint arrow-spacing: ["error", { "before": false, "after": true }]*/

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

版本

此规则是在 ESLint v1.0.0-rc-1 中引入。

资源