disallow trailing whitespace at the end of lines (no-trailing-spaces)

禁用行尾空白 (no-trailing-spaces)

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。

Sometimes in the course of editing files, you can end up with extra whitespace at the end of lines. These whitespace differences can be picked up by source control systems and flagged as diffs, causing frustration for developers. While this extra whitespace causes no functional issues, many code conventions require that trailing spaces be removed before check-in.


Rule Details

This rule disallows trailing whitespace (spaces, tabs, and other Unicode whitespace characters) at the end of lines.

该规则禁止使用行尾空白(空格、tab 和其它 Unicode 空白字符)。

Examples of incorrect code for this rule:

错误 代码示例:

/*eslint no-trailing-spaces: "error"*/

var foo = 0;//•••••
var baz = 5;//••

Examples of correct code for this rule:

正确 代码示例:

/*eslint no-trailing-spaces: "error"*/

var foo = 0;

var baz = 5;


This rule has an object option:



Examples of correct code for this rule with the { "skipBlankLines": true } option:

选项 { "skipBlankLines": true }正确 代码示例:

/*eslint no-trailing-spaces: ["error", { "skipBlankLines": true }]*/

var foo = 0;
var baz = 5;


This rule was introduced in ESLint 0.7.1.

该规则在 ESLint 0.7.1 中被引入。