String.prototype
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問題文
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ふりがな表示
(length)
length
(constructor)
constructor
(charat)
charAt
(charcodeat)
charCodeAt
(tostring)
toString
(trim)
trim
(trimleft)
trimLeft
(trimright)
trimRight
(valueof)
valueOf
(codepointat)
codePointAt
(concat)
concat
(endswith)
endsWith
(includes)
includes
(indexof)
indexOf
(lastindexof)
lastIndexOf
(localecompare)
localeCompare
(match)
match
(normalize)
normalize
(repeat)
repeat
(replace)
replace
など
(search)
search
(slice)
slice
(split)
split
(startswith)
startsWith
(tolowercase)
toLowerCase
(tolocalelowercase)
toLocaleLowerCase
(touppercase)
toUpperCase
(tolocaleuppercase)
toLocaleUpperCase