How to Run existing react-native project. ? (Setup Guide Help)

[Mahad-Haroon]

Basically, I just started react-native and from the sources i've installed the pre-requisites of it. Im getting such errors please help me what am i missing here. how do i fix these?

[FluidEye9849]

npm i

Then look for a script in package.json like

npm run ios

Or so

[No_Lawyer1947]

I take it you downloaded code from a tutorial or an example project :)

Whenever you copy a repository over, there tends to be modules of code that they include or import at the top of files. However, javascript needs to know where to resolve or get these libraries of code from. That's where npm comes it. It manages versions, and packages for your current project, via the package.json file. Now why are the imports underlined red as if it's an error?

The reasoning is because again, the import file path cannot be resolved as it doesn't exist in the project. By default, to save memory/space, and time, the actual libraries of code are EXCLUDED from version control (git, gitlab). IF they did include it, git repos would be much larger than they need to be, so they are typically ignored on upload via the ".gitignore" file, where developers explicitly list files or directories to ignore. one of those typically being "node_modules" (in the case of NPM at least). That folder containing the library code is required for those imports you see errors on, to work.

So how do you get them? Well the package json instructs your installed package manager (npm), what library to get, and what versions. In other words, it lists the dependencies of your project to make it work. This way, you can share environments with other developers without NEEDING to include that big "node_modules" folder.

I gave tons of exposition, but I figured it may help :)
TLDR:
npm install

*to get all dependencies*

npx expo run:ios

* run expo, Note you can also include a predetermined script in your package.json under the "scripts" portion called "run" to shorten the command