typeof instanceof 之间的区别总结

    a=1;
    b=true;
    c="c";
    d=function(){
        console.log(" is d");
    }
    e={ e1:"is e1"}
    f=null;
    g=[1,2,3];
     
    console.log("a typeof="+typeof(a));
    console.log("b typeof="+typeof(b));
    console.log("c typeof="+typeof(c));
    console.log("d typeof="+typeof(d));
    console.log("e typeof="+typeof(e));
    console.log("f typeof="+typeof(f));