JavaScript variable assignment and parameter passing

Come to the conclusion first!

Variable assignment:

Base type: passed by value (that is, a copy is copied)

Reference type: passed by reference (that is, a reference to the object is passed)

Parameter passing

Base type: passed by value (that is, a copy is copied)

Reference type: Passing by value (that is, copying a copy)//There is a doubt!!!!

If all the above conclusions are known, you can stop looking down ...

Variable assignment- basic type
var num1 = 1;

var num2 = NUM1;
Num2= 2;
alert (NUM1);//1

Variable assignment-- object type     varnew  object ();     // Modify the point    var obj2 = obj1;     ' haha ' ;    alert (obj2.name);     // The result is haha .

function SetName (obj) {obj.name='haha'; Obj=NewObject (); Obj.name='Wuwuwu'; }    varperson=NewObject (); alert (person.name);//according to the author, here is the haha instead of the Wuwuwu. Description is a value pass rather than a reference (feel the problem with this example)//But the result of my variable assignment is still haha, not wuwu.     varObj1 =NewObject (); //Modify the Point    varObj2 =obj1; Obj2.name='haha'; Obj2=NewObject (); Obj2.name='Wuwuwu'; alert (obj1.name);

JavaScript variable assignment and parameter passing