My Node version is v16.15.0, and I am trying to learn the opensea-js sdk, see https://github.com/ProjectOpenSea/opensea-js

In the part 1 of Getting Started, If I use "import", I get Uncaught TypeError: Failed to resolve module specifier "web3". Relative references must start with either "/", "./", or "../".

If I use "require", I get Uncaught ReferenceError: require is not defined

I have tried adding "type":"module" or "type":"commonjs" in my package.json, but it can't work.

Thank you for your help.