| pageClass | sidebarDepth | title | description | since |
|---|---|---|---|---|
rule-details |
0 |
regexp/no-standalone-backslash |
disallow standalone backslashes (`\`) |
v0.10.0 |
disallow standalone backslashes (
\)
This rule disallows backslash (\) without escape.
E.g. the regular expression /\c/ without the unicode (u) flag is the same pattern as /\\c/.
In most cases, standalone backslashes are used by accident when a control escape sequence (\cX) or another escape sequence was intended. They are very confusing and should not be used intentionally.
This behavior is described in Annex B of the ECMAScript specification.
/* eslint regexp/no-standalone-backslash: "error" */
/* ✓ GOOD */
var foo = /\cX/;
/* ✗ BAD */
var foo = /\c/;
var foo = /\c-/;
var foo = /[\c]/;Nothing.
This rule was introduced in eslint-plugin-regexp v0.10.0