Question

all right, it’s far easier showing some code…

Is there any performance or any other kind of difference between this javascript code

var obj = {
  'id':   0,
  'name': 'new obj'
};

and

var obj = {
  id:   0,
  name: 'new obj'
};

(Have a look at the single quotes surrounding id and name)

—

If I recall correctly, in php it was adviced to always use the single quotes, because if not the interpreter had to check if there existed a variable with that name…

Answer 1

no performance difference i believe.

Usually we use quotes to use reserved words in JavaScript like class, which is not allowed to be used as an object key.