Can I add properties to package JSON?

Yes, you’re allowed to add custom entries to package. json .

Can I modify package json file?

json file. If you want to add the latest version either you can run npm install or npm install @latest . … json file will get updated but not package.

What information can go into a package json file?

Your package. json holds important information about the project. It contains human-readable metadata about the project (like the project name and description) as well as functional metadata like the package version number and a list of dependencies required by the application.

Can you add comments to package json?

According to Isaac Schlueter who created npm: … the “//” key will never be used by npm for any purpose, and is reserved for comments … If you want to use a multiple line comment, you can use either an array, or multiple “//” keys.

What is the main property in package json?

The main property

json is a direction to the entry point to the module that the package. json is describing. In a Node. js application, when the module is called via a require statement, the module’s exports from the file named in the main property will be what’s returned to the Node.

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Should I push package json?

You need to commit package. json . All other developers, after pulling the code, will just need to perform npm install to get the latest dependencies required for the project. Whenever you or someone else wants to add new dependencies to the project you perform npm install –save or npm install –save-dev .

Can I modify package-lock json?

A key point here is that install can alter package-lock. json if it registers that it’s outdated. For example, if someone manually alters package. json — say, for example, they remove a package since it’s just a matter of removing a single line — the next time that someone runs npm install , it will alter package-lock.

What is the difference between package json and package-lock json?

To avoid differences in installed dependencies on different environments and to generate the same results on every environment we should use the package-lock. json file to install dependencies. … json file and you will able to generate the same results as you developed with that particular package.

What is bin in package json?

bin. A lot of packages have one or more executable files that they’d like to install into the PATH. npm makes this pretty easy (in fact, it uses this feature to install the “npm” executable.) To use this, supply a bin field in your package.json which is a map of command name to local file name.

What are peerDependencies in package json?

peerDependencies. Peer dependencies are a special type of dependency that would only ever come up if you were publishing your own package. Having a peer dependency means that your package needs a dependency that is the same exact dependency as the person installing your package.

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Can package json have comments?

json file. You can find most of the possible ways to add comments to JSON in the linked article. This will be a good way for adding comments to your package. json file if you maintain a good structure of your comments preferably close to the structure of your package.

Are comments permitted in json?

JSON doesn’t support comments by default but some parsers and apps allow you to add comments especially that JSON is nowadays used for configuration files where comments can be very useful. … If you edit a JSON file that contains comments. VS Code will outputs an error saying: “Comments are not permitted in JSON.”

What is resolutions in package json?

Yarn supports selective version resolutions, which lets you define custom package versions or ranges inside your dependencies through the resolutions field in your package. json file. Normally, this would require manual edits in the yarn. lock file.

How do I run a main package in json?

If you set the package. json main parameter as follows “main”: “lib/module. js” , you will be able to load the module this way: require(‘my-npm-module’) . If you have for instance in your package.

How do I install a specific version?

Use npm list [package-name] to know the specific latest version of an installed package. Use npm install [package-name]@[version-number] to install an older version of a package. Prefix a version number with a caret (^) or a tilde (~) to specify to install the latest minor or patch version, respectively.

Which is better npm or yarn?

As you can see above, Yarn clearly trumped npm in performance speed. During the installation process, Yarn installs multiple packages at once as contrasted to npm that installs each one at a time. … While npm also supports the cache functionality, it seems Yarn’s is far much better.

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