関連ワード:  javascript get first 3 characters of string    javascript get first 3 letters of string    javascript first 3 characters of string    take first 3 characters of string javascript    javascript compare first 3 characters of string    javascript check first 3 characters of string    javascript remove first 3 characters of string    javascript first 3 letters of string    javascript get first 4 characters of string  
結果 : javascript get first 3 characters of string