Regex

Regex conveniences — escape a string for literal use in a pattern, test, match all, split, replace all. escapeRegExp is the one that earns its place: interpolating user input into a RegExp without it gives you a broken pattern at best and catastrophic backtracking at worst. The rest are thin wrappers that add the g flag where it is needed and return plain arrays rather than iterators, so results are easy to destructure and inspect.

Example

import { escapeRegExp, matchAll } from '@rtorcato/js-common/regex'

// Highlight the user's search term. Without escaping, 'c++' is an invalid pattern
// and '(.*)' quietly matches everything.
const pattern = new RegExp(escapeRegExp(userInput), 'gi')
text.replace(pattern, (hit) => `<mark>${hit}</mark>`)

matchAll('a1b22c', /\d+/) // [['1'], ['22']] — a plain array, not an iterator

Import

import { escapeRegExp, matchAll, replaceAllRegex } from '@rtorcato/js-common/regex'

Exports

Name	Summary
`escapeRegExp`	Escapes special regex characters in a string so it can be used in a RegExp.
`matchAll`	Returns all matches of a regex pattern in a string.
`replaceAllRegex`	Replaces all matches of a regex pattern in a string with a replacement.
`splitByRegex`	Splits a string by a regex pattern.
`testRegex`	Tests if a string matches a given regex pattern.

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Example

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