package-lock.json explained
package-lock.json explained #devtools99 #webdevelopment #javascript #programming #webdeveloper
package-lock.json Explained
Every project generated by the npm CLI has a file named package.json that stores information about the project, such as its name and dependencies.
However, there is also another file that gets generated called package-lock.json, which you need to commit to your repository, although most people don't know why it even exists.
The package.json file lists the dependencies and their versions that are required for your project to work. You can use special characters like ^ and ~ to let npm install the latest patch or minor version of a package.
This can sometimes be problematic. For example, imagine you are using React version 18.0.0 in your project, and you are using ^. This means npm will try to install the latest patch or minor version of React. Then, someone clones your project, and npm installs version 18.1.0 of React, which ends up breaking your app.
What they can do is run the "npm ci" command to install the exact version of the packages that were installed on your machine. The "npm ci" command uses the package-lock.json file instead of the package.json file to look for dependencies and their specific versions.
The package-lock.json file contains a description of the exact tree of your node_modules folder. npm updates the package-lock.json file whenever node_modules changes by running npm commands like install, update, or remove. This is especially useful for continuous integration.
This is why lockfile conflicts are so common when merging in Git.
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