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before
和 after
,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 }
的 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 }
的 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 }
的 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 }
的 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 }
的 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 }
的 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。