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

The --fix option on the command line automatically fixes problems reported by this rule.

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.

Examples of incorrect code for this rule:

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

var foo = 0;//•••••
var baz = 5;//••
//•••••

Examples of correct code for this rule:

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

var foo = 0;
var baz = 5;

Options

This rule has an object option:

skipBlankLines

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

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

var foo = 0;
var baz = 5;
//•••••

Version

This rule was introduced in ESLint 0.7.1.

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