# regexp/prefer-predefined-assertion
prefer predefined assertion over equivalent lookarounds
- ⚙️ This rule is included in
"plugin:regexp/recommended"
. - 🔧 The
--fix
option on the command line (opens new window) can automatically fix some of the problems reported by this rule.
# 📖 Rule Details
All predefined assertions (\b
, \B
, ^
, and $
) can be expressed as lookaheads and lookbehinds. E.g. /a$/
is the same as /a(?![^])/
.
In most cases, it's better to use the predefined assertions because they are better known.
# 🔧 Options
Nothing.
# 🚀 Version
This rule was introduced in eslint-plugin-regexp v0.10.0