createApplication() — express Function Reference

Architecture documentation for the createApplication() function in express.js from the express codebase.

Function javascript ExpressCore ApplicationInit

Entity Profile

ExpressCore→ ApplicationInit→ createApplication() — express Function Reference

Dependency Diagram

graph TD
  d52160c9_7d33_476d_280d_c1822b8443ab["createApplication()"]
  cfec277b_82ee_9595_362c_db549ae97eb6["express.js"]
  d52160c9_7d33_476d_280d_c1822b8443ab -->|defined in| cfec277b_82ee_9595_362c_db549ae97eb6
  style d52160c9_7d33_476d_280d_c1822b8443ab fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

lib/express.js lines 36–56

function createApplication() {
  var app = function(req, res, next) {
    app.handle(req, res, next);
  };

  mixin(app, EventEmitter.prototype, false);
  mixin(app, proto, false);

  // expose the prototype that will get set on requests
  app.request = Object.create(req, {
    app: { configurable: true, enumerable: true, writable: true, value: app }
  })

  // expose the prototype that will get set on responses
  app.response = Object.create(res, {
    app: { configurable: true, enumerable: true, writable: true, value: app }
  })

  app.init();
  return app;
}