regexp-support
Version:
check RegExp ( regular expressions ) support
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Markdown
# regexp-support
check RegExp ( regular expressions ) support
## install
```nodemon
npm install regexp-support
```
[version test log](test/log)
## Api
allow u check support on other RegExp base class
```ts
hasSupportFlag(flag: string, RegExpClass?: typeof RegExp, skipPatternCheck?: boolean): boolean
testFlag(flag: string, RegExpClass?: typeof RegExp, flagsPattern?): boolean
```
`RegExpClass` can be Object with `create`, for some class can't create by `new`
```ts
export interface ICreateRegExp
{
create(pattern: string, flag?: string, ...argv)
}
```
## demo
```ts
import support from 'regexp-support';
console.log(support);
```
## todo
* need more test on unicode set [unicode.ts](lib/pattern/charset/unicode.ts) , [unicode-script.ts](lib/pattern/charset/unicode-script.ts)
### desc
#### lookAheadPositive, lookAheadNegative
* `aa(?=bb)`
* `aa(?!bb)`
#### lookBehindPositive
* `(?<=\$)foo`
```ts
const RE_DOLLAR_PREFIX = /(?<=\$)foo/g;
'$foo %foo foo'.replace(RE_DOLLAR_PREFIX, 'bar'); // => '$bar %foo foo'
```
#### lookBehindNegative
* `(?<!\$)foo`
```ts
const RE_NO_DOLLAR_PREFIX = /(?<!\$)foo/g;
'$foo %foo foo'.replace(RE_NO_DOLLAR_PREFIX, 'bar'); // => '$foo %bar bar'
```
### node.js 10
```ts
{ nativeFlags: 'gimsuy',
flags:
{ multiline: true,
m: true,
global: true,
g: true,
ignoreCase: true,
i: true,
sticky: true,
y: true,
unicode: true,
u: true,
dotAll: true,
s: true,
freeSpacing: false,
x: false,
n: false },
flagsAll: { g: true, i: true, m: true, s: true, u: true, y: true },
pattern:
{ namedCapturingGroups: true,
namedCapturingGroupsUnicode: true,
namedCapturingGroupsEmoji: false,
namedCapturingGroupsBackreference: true,
namedCapturingGroupsDuplicate: false,
lookAheadPositive: true,
lookAheadNegative: true,
lookBehindPositive: true,
lookBehindNegative: true,
dotUnicodeEmoji: true,
classSub: false },
prototype:
{ source: true,
flags: true,
lastIndex: true,
dotAll: true,
global: true,
ignoreCase: true,
multiline: true,
sticky: true,
unicode: true },
static:
{ '$1': true,
'$2': true,
'$3': true,
'$4': true,
'$5': true,
'$6': true,
'$7': true,
'$8': true,
'$9': true,
input: true,
'$_': true,
lastMatch: true,
'$&': true,
lastParen: true,
'$+': true,
leftContext: true,
'$`': true,
rightContext: true,
'$\'': true,
'$10': false,
'$100': false },
symbol:
{ species: false,
match: true,
replace: true,
search: true,
split: true },
objectStringTag: '[object RegExp]',
unicodeSet:
{ unicode: true,
script: true,
blocks: false,
unicodeTest:
{ C: true,
Other: true,
Cc: true,
Control: true,
Cs: true,
Surrogate: true,
L: true,
Letter: true,
LC: true,
Cased_Letter: true,
Ll: true,
Lowercase_Letter: true,
Lo: true,
Other_Letter: true,
Lu: true,
Uppercase_Letter: true,
M: true,
Mark: true,
Me: true,
Enclosing_Mark: true,
Mn: true,
Nonspacing_Mark: true,
N: true,
Number: true,
Nd: true,
Decimal_Number: true,
Nl: true,
Letter_Number: true,
No: true,
Other_Number: true,
P: true,
Punctuation: true,
Pc: true,
Connector_Punctuation: true,
Pd: true,
Dash_Punctuation: true,
Pe: true,
Close_Punctuation: true,
Pf: true,
Final_Punctuation: true,
Pi: true,
Initial_Punctuation: true,
Po: true,
Other_Punctuation: true,
Ps: true,
Open_Punctuation: true,
S: true,
Symbol: true,
Sc: true,
Currency_Symbol: true,
Sk: true,
Modifier_Symbol: true,
Sm: true,
Math_Symbol: true,
So: true,
Other_Symbol: true,
Z: true,
Separator: true,
Zl: true,
Line_Separator: true,
Zp: true,
Paragraph_Separator: true,
Zs: true,
Space_Separator: true,
ASCII: true,
Alphabetic: true,
Any: true,
White_Space: true,
Alpha: true,
Emoji: true,
Emoji_Component: true,
Emoji_Modifier: true,
Emoji_Presentation: true,
Ideographic: true,
Ideo: true,
Lower: true,
Quotation_Mark: true,
QMark: true,
Unified_Ideograph: true,
Upper: true,
Combining_Mark: true,
punct: true,
Digit: false,
Alnum: false,
Punct: false,
Graph: false,
Blank: false,
Cntrl: false,
XDigit: false,
Space: false,
Decimal_Digit_Number: false },
scriptTest:
{ Arabic: true,
Bengali: true,
Common: true,
Coptic: true,
Cyrillic: true,
Ethiopic: true,
Georgian: true,
Greek: true,
Han: true,
Hangul: true,
Hiragana: true,
Katakana: true,
Latin: true,
Tamil: true,
Tibetan: true,
Arab: true,
Beng: true,
Copt: true,
Cyrl: true,
Ethi: true,
Geor: true,
Grek: true,
Hani: true,
Hira: true,
Kana: true,
Latn: true,
Taml: true,
Tibt: true },
blocksTest: { InBasic_Latin: false } } }
```
### node.js 9
> by test on RunKit
```ts
{ flags:
{ multiline: true,
m: true,
global: true,
g: true,
ignoreCase: true,
i: true,
sticky: true,
y: true,
unicode: true,
u: true,
dotAll: true,
s: true,
freeSpacing: false,
x: false,
n: false },
flagsAll: { g: true, i: true, m: true, s: true, u: true, y: true },
pattern:
{ namedCapturingGroups: false,
namedCapturingGroupsUnicode: false,
namedCapturingGroupsEmoji: false } }
```
### node.js 8
> by test on RunKit
```ts
{ flags:
{ multiline: true,
m: true,
global: true,
g: true,
ignoreCase: true,
i: true,
sticky: true,
y: true,
unicode: true,
u: true,
dotAll: true,
s: true,
freeSpacing: false,
x: false,
n: false },
flagsAll: { g: true, i: true, m: true, s: true, u: true, y: true },
pattern:
{ namedCapturingGroups: false,
namedCapturingGroupsUnicode: false,
namedCapturingGroupsEmoji: false } }
```
## link
* http://2ality.com/archive.html?tag=regexp
* http://2ality.com/2017/07/regexp-unicode-property-escapes.html
* https://en.wikipedia.org/wiki/Unicode_character_property
* http://www.wellho.net/regex/javare.html
* https://zhuanlan.zhihu.com/p/33335629
* https://github.com/Icemic/huozi.js/blob/master/lib/isCJK.js
* https://github.com/ethantw/Han/blob/master/src/js/regex/unicode.js
* https://github.com/tc39/proposal-regexp-unicode-property-escapes#why-not-support-the-name-property-pname
* https://stackoverflow.com/questions/6493954/how-to-properly-write-regex-for-unicode-first-name-in-java