arrow-spacing
Enforce consistent spacing before and after the arrow in arrow functions
🔧 Fixable
Some problems reported by this rule are automatically fixable by the --fix
command line option
这条规则规范了箭头函数的箭头(=>
)前后的间距样式。
/*eslint-env es6*/
// { "before": true, "after": true }
(a) => {}
// { "before": false, "after": false }
(a)=>{}
规则细节
这个规则接受对象参数,其中包含 before
和 after
属性,每个都是布尔值。
默认配置是 { "before": true, "after": true }
。
true
意味着应该有一个或多个空格,false
意味着没有空格。
使用此规则与默认 { "before": true, "after": true }
选项的错误示例:
Open in Playground
/*eslint arrow-spacing: "error"*/
/*eslint-env es6*/
()=> {};
() =>{};
(a)=> {};
(a) =>{};
a =>a;
a=> a;
()=> {'\n'};
() =>{'\n'};
使用此规则与默认 { "before": true, "after": true }
选项的正确示例:
Open in Playground
/*eslint arrow-spacing: "error"*/
/*eslint-env es6*/
() => {};
(a) => {};
a => a;
() => {'\n'};
使用此规则与 { "before": false, "after": false }
选项的错误示例:
Open in Playground
/*eslint arrow-spacing: ["error", { "before": false, "after": false }]*/
/*eslint-env es6*/
() =>{};
(a) => {};
()=> {'\n'};
使用此规则与 { "before": false, "after": false }
选项的正确示例:
Open in Playground
/*eslint arrow-spacing: ["error", { "before": false, "after": false }]*/
/*eslint-env es6*/
()=>{};
(a)=>{};
()=>{'\n'};
使用此规则与 { "before": false, "after": true }
选项的错误示例:
Open in Playground
/*eslint arrow-spacing: ["error", { "before": false, "after": true }]*/
/*eslint-env es6*/
() =>{};
(a) => {};
()=>{'\n'};
使用此规则与 { "before": false, "after": true }
选项的正确示例:
Open in Playground
/*eslint arrow-spacing: ["error", { "before": false, "after": true }]*/
/*eslint-env es6*/
()=> {};
(a)=> {};
()=> {'\n'};
Version
This rule was introduced in ESLint v1.0.0-rc-1.