require spacing around infix operators (space-infix-ops)

要求中缀操作符周围有空格 (space-infix-ops)

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。

While formatting preferences are very personal, a number of style guides require spaces around operators, such as:


var sum = 1 + 2;

The proponents of these extra spaces believe it make the code easier to read and can more easily highlight potential errors, such as:


var sum = i+++2;

While this is valid JavaScript syntax, it is hard to determine what the author intended.

虽然这是有效的 JavaScript 语法,但很难确定作者的意图。

Rule Details

This rule is aimed at ensuring there are spaces around infix operators.



This rule accepts a single options argument with the following defaults:


"space-infix-ops": ["error", {"int32Hint": false}]


Set the int32Hint option to true (default is false) to allow write a|0 without space.

设置 int32Hint 选项为 true (默认 false) 允许 a|0 不带空格.

var foo = bar|0; // `foo` is forced to be signed 32 bit integer

Examples of incorrect code for this rule:

错误 代码示例:

/*eslint space-infix-ops: "error"*/
/*eslint-env es6*/


a+ b

a +b


const a={b:1};

var {a=0}=bar;

function foo(a=0) { }

Examples of correct code for this rule:

正确 代码示例:

/*eslint space-infix-ops: "error"*/
/*eslint-env es6*/

a + b

a       + b

a ? b : c

const a = {b:1};

var {a = 0} = bar;

function foo(a = 0) { }

When Not To Use It

You can turn this rule off if you are not concerned with the consistency of spacing around infix operators.



This rule was introduced in ESLint 0.2.0.

该规则在 ESLint 0.2.0 中被引入。