Changing variable names leading to change in output

Question

When i write

var first = {name};
first.name = "myName";
console.log(first.name);
//Output: myName

But when i write

var name = {first};
name.first = "myName";
console.log(name.first);
//Output: error

Why ? All i've done is change their names

Answer 1

because var name is window.name, the name property of window object.

try using let name to declare instead.

https://code.sololearn.com/W6QCoeIi2IaM/?ref=app

Answer 2

Your problem would be solved if you changed "name" for other word and if you removed "first" from the brackets, as there is no variable called "first".

The result could be this one:
var nombre = {};
nombre.first = 'Rushikesh';
console.log(nombre.first);

If you wanted to keep "first" in the brackets, the result could be this one:
var nombre = {first:""};
nombre.first = 'Rushikesh';
console.log(nombre.first);

The reason that "first" is working here it's that it's not seen as a variable but as a property with no value.

Answer 3

yes