Why Console.log Displays Incorrect Object's Values?

I don't understand why console.log displays that d1 contains [100,200,300] before I even introduced these numbers. Regular for loop displays internals of d1 correctly though. Can s

Solution 1:

that's because what is in the console is the reference of dt not a copy.

you can copy the object and log it (the code from this question ).

or you can log the string that represents it using JSON.stringify.

console.log( JSON.stringify(dt) ); will print it as string.

Also if you are using lodash then you can use console.log(_.cloneDeep(dt)) to clone and log the correct values inside the object at that very moment.