带有webpack的Istanbul，获取`require.context`是`undefined`😭

Question

When using karma-webpack and istanbul-instrumenter-loader or isparta-loader , I get an error when attempting to implement it.

require.context comes up as undefined .

I believe this is because it is using/finding nodejs require and NOT webpack, as Object.keys(require) logs as ['keys', 'resolve', 'id'] .

Answer 1

It looks like require.context is working, but require alone would use node . This may have something to do with the way that webpack doesn't always treat object syntax as an actual object.

Therefore require has nothing to do with require.context . It is likely a regex function replace during build-time.