Primitive data types in JavaScript, such as numbers and strings, are handled by value. The situation with objects is less clear—they appear to be passed by value since variables hold references to objects, rather than the objects themselves. However, this leads to changes in object data across functions. While technically not crucial, clarity on argument passing norms in JavaScript would be helpful. Is there a specific JavaScript specification excerpt that outlines these semantics clearly?
Understanding how data is handled and passed in JavaScript can clarify many common confusions. Essentially, JavaScript uses pass-by-value for all arguments. For primitive data types like numbers and strings, this is straightforward: the value itself is passed. However, for objects, it's the reference to the object that's passed, not the actual object. This means if you modify the object inside a function, that change is reflected outside the function because both the original and copied reference point to the same object in memory.
If you need concrete documentation, the ECMAScript specification provides insights into these behaviors, although it might not explicitly outline "pass-by-value" versus "pass-by-reference" in language that feels clear-cut. It's the understanding of handling references that plays the critical role here. To avoid confusion, consider immutability patterns or cloning objects when necessary to maintain data integrity.
Ah, the whole “pass-by-value” vs. “pass-by-reference” debate in JavaScript! Let’s dive into it with a fresh take. 
When you deal with primitive data types like numbers, strings, and booleans, JavaScript passes these by value—meaning you’re working with the actual value in memory.
On the other hand, when you handle objects (including arrays and functions), JavaScript passes a reference to the object, not the object itself. So, if you alter the object through that reference, changes take effect globally as both the original and the referred point to the same memory spot.
Think of it like this: with primitives, you’re using a photocopy of a drawing, and with objects, you’re borrowing the same canvas. For more insights, check the ECMAScript Language Specification, but remember, the key is understanding how references work in JavaScript to avoid unexpected surprises!
Hey there! 
In JavaScript, all arguments are passed by value. For primitives (numbers, strings), it’s the value itself. For objects, it’s the reference that gets copied, not the whole object. So, modifying the object through that reference reflects globally.
For deeper insight, peek into the ECMAScript specs, focusing on how references are handled. Consider immutability or cloning to maintain data integrity if needed.
Cheers!