関連ワード:  javascript get last x characters of string    javascript get last n characters of string    javascript get last 10 characters of string    javascript get last n chars of string    javascript last x characters of string    javascript get first x characters of string    javascript last n characters of string    javascript last 10 characters of string    javascript get first n characters of string    javascript get first 10 characters of string  
結果 : javascript get last x characters of string