Function Call vs. Function Object in `setTimeout()`: What's the Difference and Why Does it Matter?

Function Call vs. Function Object in setTimeout()

When working with setTimeouts in JavaScript, it's crucial to understand the difference between a function object and a function call. In the provided code:

setTimeout(GetUsersNumber(), 50000);

You're inadvertently making a function call by including parentheses after the function name, GetUsersNumber(). This executes the function immediately, which is not the desired behavior for a timed function.

To correctly delay the function execution, you need to pass the function object instead. Remove the parentheses from GetUsersNumber():

setTimeout(GetUsersNumber, 5000);

This delay represents 5 seconds, assuming that's what you intended (the original code had a delay of 50,000 milliseconds, which is 50 seconds).

Now, the setTimeout() function will wait for the specified interval (5 seconds) before invoking the GetUsersNumber() function. This will ensure that the value on the HTML page is updated every 5 seconds, preventing unnecessary strain on the server.

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