Module wasm_runner 

Step-based program runner for WASM targets.

WasmRunner drives an ftui Model without threads, blocking polls, or OS-level I/O. Instead, the host (JavaScript) delivers events via [push_event] and calls [step] / [render] from its own animation loop.

The execution model is:

JS animation frame
  → push_event(Event)        // keyboard, mouse, resize
  → step(now)                // drain events, fire ticks, run model.update
  → render()                 // if dirty: model.view → Buffer + optional Diff
  → present the output       // apply patches to WebGPU / canvas

Deterministic record/replay: all inputs go through the event queue with monotonic timestamps from the host clock (performance.now()), so replaying the same event stream produces identical frames.

Structs

RenderedFrame

Rendered frame output from WasmRunner::render.

StepResult

Outcome of a single WasmRunner::step call.

WasmRunner

Step-based program runner for WASM (no threads, no blocking).