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It's going to be a quick lesson to avoid any memory leaks, so whenever we're generating that create

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object neutral, there's a precaution that we should take and that's to avoid any memory leaks.

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So using the file value, we're going to check to see if it already exists.

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So I'm going to move this actually as a global variable.

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And that way, if we create a second file, we can always check to see if the first one exists.

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So let's take a look for that before we generate our.

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Create object euro and we're going to check to see if file is not equal to null.

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So basically, if there is a value for file, then what we want to do is we want to use that window

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object you, Earl, and revoke object you URL.

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So basically it releases an existing object, your URL that might be there and we're going to revoke

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it as file.

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So that will give us the ability when we do want to create the new one that we're removing that existing

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one.

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And we're actually going to place that on neutral instead of file so that you are all needs to be the

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one that's the global object, not the file.

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So we're checking to see if the Eurail is there.

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And if it is, then we're releasing the URL and otherwise we're going to set the URL and then this one

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can still have the file within the CSFI.

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So within that scope.

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There's a URL and this is the revoking of the URL, checking to see if it's available globally and this

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is obviously a URL is a window object, so you can include the window as well to make it more exact.

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And I'll work the same way.

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So let's try that out.

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So now when we create the file and we can create another file, we can create another one because it's

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constantly releasing the existing one, whereas before if we clicked it, we would only have the one.

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So it's a quick fix.

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And coming up next, we're going to go back into creating the CSV file.