What is YARN and npm

yarn to JavaScript, is what composer is to PHP, a dependency manager, meant to replace npm, but still works with npm

package.json is the file that dictated the dependencies for npm

So, a small comparison of yarn commands (executed in the terminal in the project’s directory which produces a build directory within that directory), the build directory is what you serve the world, in other words, it is what you put in your website’s root directory !

Create the build directorynpm run buildyarn run build
Update all packagesnpm installyarn (synonyms to yarn install)