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CSSStyleDeclaration JS Conversion


JavaScript RegExp m wysiger


Voorbeeld

Doen 'n meerlynsoektog vir "is" aan die begin van elke reël in 'n string:

let text = `Is this
all there
is`

let pattern = /^is/m;

Definisie en gebruik

Die "m" wysiger spesifiseer 'n meerlynpassing .

Dit beïnvloed slegs die gedrag van begin ^ en einde $ .

^ spesifiseer 'n pasmaat aan die begin van 'n string.

$ spesifiseer 'n passing aan die einde van 'n string.

Met die "m" stel, pas ^ en $ ook aan die begin en einde van elke reël.

Blaaierondersteuning

/regexp/m is 'n ECMAScript3 (ES3) kenmerk.

ES3 (JavaScript 1999) word ten volle ondersteun in alle blaaiers:

Chrome IE Edge Firefox Safari Opera
Yes Yes Yes Yes Yes Yes

Sintaksis

new RegExp("regexp", "m")

or simply:

/regexp/m


Wenk

Die "m" wysiger is hooflettersensitief en nie globaal nie.

Om 'n globale, hoofletter-onsensitiewe soektog uit te voer, gebruik "m" met "g" en "i".

Voorbeeld

'n Globale, meerlynsoektog vir "is" aan die begin van elke stringlyn:

let text = `Is this
all there
is`

let pattern = /^is/gm;

Voorbeeld

'n Globale, hoofletter-onsensitiewe, meerlynsoektog vir "is" aan die begin van elke stringreël:

let text = `Is this
all there
is`

let pattern = /^is/gmi;

Voorbeeld

'n Globale, meerlynsoektog vir "is" aan die einde van elke stringlyn:

let text = `Is this
all there
is`

let text = "Is\nthis\nhis\n?";
let pattern = /is$/gm;

Wenk

Gebruik die multiline -eienskap om te kyk of die m wysiger gestel is.

Kyk of die "m" wysiger gestel is:

let pattern = /W3S/gi;
let result = pattern.multiline;

Soekmetodes vir gereelde uitdrukkings

In JavaScript kan 'n gewone uitdrukking tekssoektog met verskillende metodes gedoen word.

Met 'n patroon as 'n gereelde uitdrukking, is hierdie die mees algemene metodes:

VoorbeeldBeskrywing
text.match( patroon )Die String-metode pas()
text.search( patroon )Die String metode soek()
patroon .exec(teks)Die RexExp-metode exec()
patroon .toets(teks)Die RegExp metode toets()