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Tail Call Optimization

Tail Call Optimization (TCO) is a feature in JavaScript that allows developers to make recursive function calls efficiently. This feature optimizes a specific type of function call known as a tail call.

A function call is considered a tail call when the function is the last operation performed by another function. For this scenario, the JavaScript engine doesn't need to keep the current stack frame in memory, and it could be replaced by the next function call, thus saving memory and preventing potential stack overflow for deep recursion.

However, it's essential to note that as of this writing, TCO is not supported by all JavaScript engines. ReactJS does not have out-of-the-box support for TCO, and its implementation will depend on the JavaScript engine your application uses.

Here is an example of a tail recursive function:

function factorial(n, acc = 1) {
if (n === 0) {
return acc;
} else {
return factorial(n - 1, n * acc);

In the above example, the recursive call to the `factorial` function is the last operation in the function, hence it's a tail call. The function uses an accumulator `acc` to hold the result of the factorial computation, which gets passed into each recursive call. This implementation allows TCO, hence preventing potential stack overflows for large inputs.

Again, remember, whether this code runs optimally and doesn't cause a stack overflow depends on whether your JavaScript environment supports TCO.

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