easyJet Brand Widget Service (easyDom)
easyJet's hosted client-side widget platform for partner and white-label sites. Each widget is a script tag on brand.easyjet.com whose behaviour is driven by query-string parameters and scoped to a partner identifier. The branding widgets (Header.js, Footer.js) answer anonymously with HTTP 200; the identity widgets (Script.js, SignIn.js, Registration.js, VRPanel.js) return a zero-byte body unless the partner id is recognised, and drive easyJet customer sign-in, registration and visitor recognition through the easyDom JavaScript library in Redirect, Dialog or Embedded mode. easyJet publishes no documentation, no versioning and no support channel for this surface; the parameter and callback contract catalogued here was observed verbatim from easyJet's own publicly indexed sample partner implementation. It is not a data API — no flight search, booking or ancillary operation is exposed — but it is the only easyJet integration surface reachable without a commercial agreement.