offline-pdf-app/node_modules/axios/lib/core

axios // core

The modules found in core/ should be modules that are specific to the domain logic of axios. These modules would most likely not make sense to be consumed outside of the axios module, as their logic is too specific. Some examples of core modules are:

• Dispatching requests
  • Requests sent via adapters/ (see lib/adapters/README.md)
• Managing interceptors
• Handling config