Variable TRACE_CATEGORIESConst

Optional debug tracing. Disabled by default; zero cost when off.

Enable via one of:

• env (Node): WINDEASE_TRACE=dnd,history npm test
• browser: localStorage.setItem('windease.trace', 'dnd,history,*')
• browser: window.WINDEASE_TRACE = 'dnd'
• runtime: import { configureTrace } from '@windease/core'; configureTrace('*');

Categories are checked at call time, so toggling at runtime takes effect immediately.