> React uses console.error instead of console.warn for warnings so that browsers show a full stack trace in the console. (Our warnings appear when you use patte

> React uses console.error instead of console.warn for warnings so that browsers show a full stack trace in the console. (Our warnings appear when you use patterns that will break in future releases and for code that is likely to behave unexpectedly, so we do consider our warnings to be “must-fix” errors.) Out of all the release notes this is probably the one that I'm the most excited about. Hopefully this sheds some light on the more confusing warnings (e.g. warnings about missing keys with no real way to determine where they are missing).