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In this lecture, we're going to briefly talk about the main entry file.

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Every application has one.

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It's the first file in our application to run.

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Therefore, it's the most critical file in the entire application.

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There are two responsibilities the main entry file has.

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First, it needs to load the Angular framework.

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Our app won't be able to function correctly without Angular.

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The second responsibility is to load our app's code.

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It's important we load Angular before loading our app.

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The main entry file can be found inside the source directory.

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It's called Main.ts.

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The code inside this file is already performing the steps for loading Angular and our application.

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Regardless, I think it would be a good idea to write the code for this file.

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This way, we can genuinely understand why Angular has decided to write this code for us.

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Let's empty out the entire file.

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Our app will temporarily be broken.

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That's to be expected since we removed the entire file.

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Let's check out the browser.

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The page is completely blank.

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Perfect.

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In the next lecture, we're going to start rewriting the file to get a better understanding of what's

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going on when Angular starts our app.