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Other References

CSSStyleDeclaration JS Conversion


JavaScript String charCodeAt()

Voorbeelde

Kry die Unicode van die eerste karakter in 'n string:

let text = "HELLO WORLD";
let code = text.charCodeAt(0);

Kry die Unicode van die tweede:

let text = "HELLO WORLD";
let code = text.charCodeAt(1);

Meer voorbeelde hieronder.


Definisie en gebruik

Die charCodeAt()metode gee die Unicode van die karakter terug by 'n gespesifiseerde indeks (posisie) in 'n string.

Die indeks van die eerste karakter is 0, die tweede is 1, ....

Die indeks van die laaste karakter is string lengte - 1 (Sien Voorbeelde hieronder).

Sien ook die charAt()metode.

Let wel

Vir meer inligting oor Unicode-karakterstelle, besoek ons Unicode-verwysing .


Sintaksis

string.charCodeAt(index)

Grense

Parameter Description
indexOptional. A number.
The index (position) of a character.
Default value = 0.

Terugkeerwaarde

Tik Beskrywing
N nommerDie Unicode van die karakter by die gespesifiseerde indeks.
NaN as die indeks ongeldig is.


Meer voorbeelde

Kry die Unicode van die laaste karakter in 'n string:

let text = "HELLO WORLD";
let code = text.charCodeAt(text.length-1);

Kry die Unicode van die 15de karakter:

let text = "HELLO WORLD";
let code = text.charCodeAt(15);

Blaaierondersteuning

charCodeAt()is 'n ECMAScript1 (ES1) kenmerk.

ES1 (JavaScript 1997) word ten volle ondersteun in alle blaaiers:

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