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Now besides icons and splash screen, our app also might include other assets.

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This app actually doesn't

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but you might have other images here in the asset folder which you're using in your app with image component,

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so not network images but local images

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as we also use them earlier in the course or you might be using custom fonts as I did in many of the course

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modules.

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Now if you do that, there is actually something interesting happening in a managed expo app.

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When you publish your app and even if you later deploy it to the app stores which I will show you, these

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assets by default are actually taken by expo, are optimized and so on and are then uploaded onto one of

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their servers for free but they're uploaded there and your app is configured to download them from the

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servers when it launches.

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Now the advantage of this is that your app bundle is kept a bit smaller because the files are not included

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in your app but instead live on a server and are downloaded into the running app

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but the disadvantage of this approach can be that your app always needs an Internet connection because

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if you don't have an internet connection, your images and your fonts can't be loaded into the app and

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that of course might lead to your app not working in the way it should.

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So therefore, you actually might not want to have your images or fonts uploaded to expo's servers or

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at least not all of them

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and that's what you can control with that asset bundle patterns

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setting in the app.json file. Whichever path or paths you provide here will be excluded from uploading

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and you can use wild cards.

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Now as you see, what this basically says is all files should not be uploaded, so all files should be included

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into the app bundle.

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If this would be an empty array or if this would not be set at all, this option, then you would have the

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default behavior of uploading all assets to the servers.

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With this approach which was preconfigured here, you say upload everything to expo's servers except

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for what you find in this path and this path on the other hand is a wild card that says everything,

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so every file in every folder of this project should be part of the app bundle, so actually nothing

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will be uploaded with this setting.

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You could also be saying everything in assets or maybe everything in assets and subfolders of

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assets should be part of the asset bundle,

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if you had any other files which you use the app in other folders, you would upload them. So you can really

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control this in great detail

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and again you can learn more in the official docs if you wish to, attached you find a link to that as well

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and therefore you can control what's part of your bundle,

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therefore increasing the size of it a little bit and the loading time of the app a little bit or what

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should be stored on servers, which might make your bundle a bit smaller but which forces you to always

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have an internet connection.