Many projects choose to include their source code in the NPM distribution package bundle. One example is React, which has unminified/unbuilt JavaScript files in a lib folder, as well as built files in a dist folder.
Is this beneficial practice?
On the downside, it may increase download times and disk consumption. That's why I often add source code folders to the .npmignore file.
However, I wonder why so many libraries choose to include their source code. What are the advantages?
In my view, this question may not fit within the usual queries on SO as it leans towards opinions and discussions. Nevertheless, here are my thoughts:
Most libraries provide their source code (often open-source) to aid in debugging. They usually include a .map file as well. You can find a useful post explaining what a map file is here..
Consider this: users who employ your distribution will likely only need to install it once, perhaps during project deployment or initial installation.
Also, consider the size of your distribution. Will it significantly slow down installation time?
Generally, a few MB should not impact performance significantly on modern machines.
Personally, I believe including the source code is beneficial. Understanding how libraries function and being able to troubleshoot errors in your code interacting with the library is valuable to me. However, there may be valid reasons not to include it as well.
tl;dr
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