What's the difference between tilde(~) and caret(^) in package.json?

Question

After I upgraded to latest stable node and npm, I tried npm install moment --save. It saves the entry in the package.json

Answer 1

~ : Reasonably close to

   ~1.1.5: 1.1.0 <= accepted < 1.2.0

^: Compatible with

   ^1.1.5: 1.1.5 <= accepted < 2.0.0

   ^0.1.3: 0.1.3 <= accepted < 0.2.0

   ^0.0.4: 0.0.4 <= accepted < 0.1.0