javascript-examples/doc/topics/String.md

문자열

String

let str = new String("Hello");

charAt()
charCodeAt()
codePointAt()
indexOf()
lastIndexOf()
startsWith()
endsWith()
includes()
concat()
fromCharCode()
fromCodePoint()
split()
slice()
substring()
substr()
match(regexp)
replace(regexp)
search(regexp)
toLowerCae()
toUpperCase()
normalize()
repeat()
trim()

국제화; Intl

DateTimeFormat

const FORMAT = new Intl.DateTimeFormat("ko-KR", {
    year: "numeric", month: "2-digit", day: "2-digit",
    hour: "2-digit", minute: "2-digit", second: "2-digit",
    timeZoneName: "long"
});

let now = new Date();
console.log(FORMAT.format(now));

매개변수 옵션

• dateStyle

  • full
  • long
  • medium
  • short

• timeStyle

  • full
  • long
  • medium
  • short

• timeZone

  "UTC", "Asia/Seoul", …

• hour12

  12시간제 여부. true / false

• hourCycle

  • h11
  • h12
  • h23
  • h24

• weekday

  • long
  • short
  • narrow

• era

  • long
  • short
  • narrow

• year

  • numeric
  • 2-digit

• month

  • numeric
  • 2-digit
  • long
  • short
  • narrow

• day

  • numeric
  • 2-digit

• hour

  • numeric
  • 2-digit

• minute

  • numeric
  • 2-digit

• second

  • numeric
  • 2-digit

• timeZoneName

  • long
  • short

NumberFormat

let PRICE_FORMAT = new Intl.NumberFormat("ko-KR", {
    style: "currency", currency: "KRW",
    minimumFractionDigits: 2
});
console.log(PRICE_FORMAT.format(1000));

매개변수 옵션

• style

  • decimal
  • currency
  • percent

• currency

  "USD", "EUR", KRW", …

• currencyDisplay

  • symbol
  • code
  • name

• useGrouping

  천 단위 구분자. true / false

• minimumIntegerDigits

• minimumFractionDigits

• maximumFractionDigits

• minimumSignificantDigits

• maximumSignificantDigits