disallow control characters in regular expressions (no-control-regex)
The "extends": "eslint:recommended"
property in a configuration file enables this rule.
Control characters are special, invisible characters in the ASCII range 0-31. These characters are rarely used in JavaScript strings so a regular expression containing these characters is most likely a mistake.
Rule Details
This rule disallows control characters in regular expressions.
Examples of incorrect code for this rule:
/*eslint no-control-regex: "error"*/
var pattern1 = /\x1f/;
var pattern2 = new RegExp("\x1f");
Examples of correct code for this rule:
/*eslint no-control-regex: "error"*/
var pattern1 = /\x20/;
var pattern2 = new RegExp("\x20");
When Not To Use It
If you need to use control character pattern matching, then you should turn this rule off.
Related Rules
Version
This rule was introduced in ESLint 0.1.0.