Web Reference: Apr 18, 2023 · In JavaScript, variables can hold two types of data: primitive values and reference values. Understanding the difference between these two types of data is crucial for writing efficient and bug-free code. Mar 23, 2021 · In JavaScript, you can pass by value and by reference. The main difference between the two is that passing by value happens when assigning primitives while passing by reference when assigning objects. JavaScript always evaluates each expression in a function call parameter list before calling the function, so the parameters are always values. The confusing part is that references to objects are common JavaScript values. That doesn't make it a "pass by reference" language, however.
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