how to stop external libraries in build mode

[xxholly32]

• I confirm that this is an issue rather than a question.

Bug report

Steps to reproduce

i wrote a component with openlayer. can run in dev mode but cant build in build mode

What is expected?

build works

What is actually happening?

build failed with error "window is not definded"

Other relevant information

ssr docs not tell us how to avoid external libraries. i wonder if vuepress docs can show me how to do. or maybe provide a config to stop ssr

• My VuePress version is lower and euqal than 1.0.0-alpha.47:

  • VuePress version:
  • OS:
  • Node.js version:
  • Browser version:
  • Is this a global or local install?
  • Which package manager did you use for the install?
  • Does this issue occur when all plugins are disabled?

• My VuePress version is higher than 1.0.0-alpha.47, the following is the output of npx vuepress info in my VuePress project:

[ulivz]

See: Browser API Access Restrictions

[xxholly32]

ty for your help