myapp % npm install
npm WARN deprecated core-js@2.6.12: core-js@<3.3 is no longer maintained and not recommended for usage due to the number of issues. Because of the V8 engine whims, feature detection in old core-js versions could cause a slowdown up to 100x even if nothing is polyfilled. Please, upgrade your dependencies to the actual version of core-js.
added 123 packages, and audited 124 packages in 23s
7 packages are looking for funding
run `npm fund` for details
4 vulnerabilities (2 low, 2 high)
To address all issues, run:
npm audit fix --force
Run `npm audit` for details.
原文：https://www.cnblogs.com/anyboo/p/15171725.html