関連ワード:  null is not a data type of javascript    null is not a data type of javascript true or false    which of the following is not a javascript data type null undefined number    which of the following is not a javascript data type null undefined number class    is not null in javascript    not javascript data types    is null a data type in javascript    is null a data type    is not null js  
結果 : null is not a data type of javascript