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#Resolve aliases jest test webpack full#In that sense, you'll need to give full import, like models/User/index.Īfter some tests, I've realized that isn't necessarily the plugin's fault. If you try to do something like models/User/ the plugin will complain saying that "models/User" is a folder, not a file. That's because the official plugin to do that isn't smart enough to recognize index.js imports. ![]() Rollup is one of the most annoying tools to do this configuration. #Resolve aliases jest test webpack how to#If we want to let VSCode aware of how to suggest these modules, we need to create a file called jsconfig.json (in root level), which it's a JavaScript version of tsconfig.json and also declare those alias there:Īfter this, you'll be able to import files from helpers/ and models/. When you just configure alias in Babel, for example, you kinda lost that and that's sucks. If you use VSCode, you probably already notice that when you need to import something, because VSCode uses TS, and it does a lot of inference, usually it's possible either to automatically imports the method you're trying to use or have an autocompletion for the imports, right? After that, you'll check how your project works and do all configurations needed to enable this feature into your project.īefore we dive deep into the configs, let's talk about Developer Experience (DX). #Resolve aliases jest test webpack plus#If you're working on a JS project with all these configurations and want to move to TypeScript, you'll need to keep this configuration everywhere plus configure the tsconfig.json file to let TS aware of how to resolve those aliases.Īs you can see this can be puzzling but here I want to give you an understanding of each possible tool.If you're working in a JS project with some built-in Webpack config and you add Storybook, you'll need to add an alias in both and also customize Storybook.If you're working on a JS project only with Babel and add jest to test your app, you'll need to add aliases in both places.Here some examples where this could be tricky: The more tooling you introduce in your application, the more complicated it becomes to get it configured. Nice, I only need to do once this configuration!Īnd the answer is: it depends. ![]() But luckily we are always using a tool that supports that (e.g. JavaScript itself does not allow us doing that those imports natively. A lot of waste of energy having to navigate to the code. #Resolve aliases jest test webpack code#In the same example above we would have some code like this: Hey, when you encounter "helpers/text", could you consider "./src/helpers/text" please? Module resolution or import alias is a way we can emulate the same way we import node_modules but with our internal code. We have a better way to do that and it's via module resolution or import alias That's not too much work but isn't by far optimal. Of course, modern code editors can help you out with that by just showing you which level you are and sometimes even completing it for you, but still.Īnother problem is that if you eventually create a subfolder (for whatever reason you might have), you need to fix ALL imports by adding another "go up" level in the path. It's not so bad, but as soon as you start having more and more imports from different folders and levels, it starts to become more confusing.Īlso, you always need to guess how many levels you have to go up and down to import your code. ![]() Let's see an example of a tiny and not too nested app folder structure:Įnter fullscreen mode Exit fullscreen mode and sometimes, creating subfolders inside these folders and as consequence, creating a deeply nested structure. Notwithstanding we don't have a standard of "how to structure", we always try to organize like components, helpers, models, etc. In well-structured JavaScript applications it's common we organize our codebase in a way that makes explicit what these files do or each domain they belong to. The idea here is to do not stitch in any specific framework/tool but to give you an idea of knowing what and how to do, based on your application setup.įirst, let's check what problem we're trying to solve, a solution in a more abstract way and how to configure your project to support that. This is might be an old topic but I think it still can be a bit confused when you try to do this configuration: ![]()
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