You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.2 KiB
49 lines
1.2 KiB
1 month ago
|
const RE_REGEXP_CHAR = /[\\^$.*+?()[\]{}|]/gu
|
||
|
|
const RE_HAS_REGEXP_CHAR = new RegExp(RE_REGEXP_CHAR.source)
|
||
|
|
|
||
|
|
const RE_REGEXP_STR = /^\/(.+)\/(.*)$/u
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
|
||
|
|
* "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
|
||
|
|
*
|
||
|
|
* @param {string} string The string to escape.
|
||
|
|
* @returns {string} Returns the escaped string.
|
||
|
|
*/
|
||
|
|
function escape(string) {
|
||
|
|
return string && RE_HAS_REGEXP_CHAR.test(string)
|
||
|
|
? string.replace(RE_REGEXP_CHAR, String.raw`\$&`)
|
||
|
|
: string
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Convert a string to the `RegExp`.
|
||
|
|
* Normal strings (e.g. `"foo"`) is converted to `/^foo$/` of `RegExp`.
|
||
|
|
* Strings like `"/^foo/i"` are converted to `/^foo/i` of `RegExp`.
|
||
|
|
*
|
||
|
|
* @param {string} string The string to convert.
|
||
|
|
* @returns {RegExp} Returns the `RegExp`.
|
||
|
|
*/
|
||
|
|
function toRegExp(string) {
|
||
|
|
const parts = RE_REGEXP_STR.exec(string)
|
||
|
|
if (parts) {
|
||
|
|
return new RegExp(parts[1], parts[2])
|
||
|
|
}
|
||
|
|
return new RegExp(`^${escape(string)}$`)
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Checks whether given string is regexp string
|
||
|
|
* @param {string} string
|
||
|
|
* @returns {boolean}
|
||
|
|
*/
|
||
|
|
function isRegExp(string) {
|
||
|
|
return RE_REGEXP_STR.test(string)
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = {
|
||
|
|
escape,
|
||
|
|
toRegExp,
|
||
|
|
isRegExp
|
||
|
|
}
|