creepjs (reference impl)

Pairs `navigator.userAgent` with `navigator.userAgentData.platform`. UA-CH consistency cross-check. A spoofed UA usually leaves UA-CH untouched (or vice versa).

• members: ["navigator.userAgent","navigator.userAgentData.platform"]
• witnesses: [{"key":"navigator.userAgent","loc":{"end":{"line":2045,"column":48},"start":{"line":2045,"column":29}},"snippet":"navigator.userAgent"},{"key":"navigator.userA

navigator.userAgent

Pairs `navigator.platform` with `navigator.userAgentData.platform`. legacy-platform vs UA-CH-platform consistency.

• members: ["navigator.platform","navigator.userAgentData.platform"]
• witnesses: [{"key":"navigator.platform","loc":{"end":{"line":2042,"column":46},"start":{"line":2042,"column":28}},"snippet":"navigator.platform"},{"key":"navigator.userAge

navigator.platform

Pairs `Intl.DateTimeFormat().resolvedOptions().timeZone` with `Date.prototype.getTimezoneOffset` (or `Date.toString`). timezone-spoofing consistency check; a known headless tell.

• members: ["Intl.DateTimeFormat","*.getTimezoneOffset"]
• witnesses: [{"key":"Intl.DateTimeFormat","loc":{"end":{"line":1138,"column":44},"start":{"line":1138,"column":25}},"snippet":"Intl.DateTimeFormat"},{"key":"*.getTimezoneOf

Intl.DateTimeFormat

Pairs WebGL `UNMASKED_RENDERER_WEBGL` access with `navigator.platform`. GPU/OS cross-check (a Mac claiming an NVIDIA renderer is a strong tell).

• members: ["*.getExtension","navigator.platform"]
• witnesses: [{"key":"*.getExtension","loc":{"end":{"line":1809,"column":58},"start":{"line":1809,"column":33}},"snippet":"contextWebgl.getExtension"},{"key":"navigator.plat

contextWebgl.getExtension

Pairs screen dimensions with `devicePixelRatio` and `outerWidth`. geometry triangulation for window-size spoofing detection.

• members: ["screen.width","screen.height","devicePixelRatio"]
• witnesses: [{"key":"screen.width","loc":{"end":{"line":3748,"column":28},"start":{"line":3748,"column":16}},"snippet":"screen.width"},{"key":"screen.height","loc":{"end":{

screen.width