How I Got MediaPipe Face Landmarker Running in the Browser with Zero Build Tools (And the Import Bug That Wasted My Week

I built facecalculators.com a free, privacy-first face shape detector that runs entirely in the browser. No uploads. No server. No account. All facial analysis happens locally via WebAssembly, and nothing biometric ever leaves the device. The core of it is Google's MediaPipe Face Landmarker with the 478-point 3D model. Getting it working in a pure vanilla JavaScript environment, without a build tool, without React, and inside a WordPress theme, was not as straightforward as the docs make it look