Since, module attribute is not supported or a standard in node. This is a pattern that is encouraged and followed mainly on the bundlers userland.īut in node environment you need to export using only main field. The most common approach that package authors take is, exporting cjs using main field in package.json. And few cdn's resolve to the latest version of the package in that case. So, cdn's fail to reolve to fetch any meta like package version etc. Since the package is missing from both the places. If we serve such package from a cdn service, they tend to fail. Is not installed as it is missing from both depepdencies and peerDependencies. So, even if we manualy install peerDependencies. It install's only dependencies and not devDependencies. Which unstalls both deependencies and devDependencies but when we use When we are using such packages to bundle or build, we usually use the command that we had below. But the package defines react and reat-domĪs devDependency but not as peerDependency.Īccording to npm documentation, it's clear that devDependencies are using only in local development and testing.Īny package that is required by your application should go under dependecies or peerDependencies. And rc-util uses reactĭirectly in it's files. Here is a example, is using rc-image and rc-image in return is using rc-util. When using a package we mainly look at direct dependencies from package.json that the package is using.īut, we need to be careful about the sub-dependencies of the direct-dependencies the main package is using. When a package author misses defining a package in the package.json. Here, i am trying to explain a few of them. In the course of time, we had ran into several issues. So, these cdn's need to do some static-analysis of the package to serve them for clients. But, most of the libraries whichĪre shipped to npm today don't actully specify the exports-map. These cdn's mostly rely on exports-map which is a standard in node. We need a pure esm based one, so we can't rely on unpkg. Let's see the "why" and "what" and "how" here. PIKA and JSPM does transpiles the code from cjs to esm and then remaps all the imports to a statically transpiled ahead of time packages.īoth pika and jspm are doing a great job in handling all the problems that are caused because of mis-configured packages.Īs i was referring earlier that i was working on a version on my own. But unpkg has a new flag ?module which looks for the module entry point instead. It doesn't apply any bundling, transpiling or compressing. It basically parses the route you are asking for and serves the code. UNPKG can be considered as "mirror" for npm packages. How traditional UNPKG is different from Skypack and JSPM I will try to point out a few obseervation and try to explain then,Ī full unbundled development is just a few steps away. It started out as a fork from packd and over the time evolved and Like a hybrid version of cdn which servers packages from npm but bundled. So, i recently started working on something, where to mix both esm and bundling. Most of the modules are being published using cjs format and a esm entry with module flag in package.json file which is again a non nodejs standard. I recently started working with esm based cdn's and there are some short comings because of how the modules are being published to npm. In this blogpost, let us discsuss about the state of current CDN based unbundled application development looks like.
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