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package.json vs. package-lock.json

Photo by Caspar Camille Rubin on Unsplash

What is package.json

What is package-lock.json

Do we need both ?

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A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store