Understanding JavaScript Execution Context and Call Stack for Better Debugging

Every time a JavaScript function runs, the engine creates an execution context containing scope, the value of 'this', and local variables, stacking these contexts in a call stack that follows LIFO order. Understanding this mechanism is critical for reading stack traces quickly and diagnosing errors like 'Maximum call stack size exceeded' under real traffic. Two common bugs tied directly to the call stack are uncontrolled recursion leading to stack overflow, and async code that silently drops stack traces when errors are not properly chained. Recursive functions without a base case or those traversing cyclic data structures can exhaust the call stack in production, and the recommended fix is converting to an iterative approach using an explicit stack with cycle detection. Since ES2022, JavaScript supports exception chaining via the 'cause' option when throwing errors, which preserves the original stack trace alongside business context for more useful production logs.