code: function handleSuccess() {
    clearOutdatedErrors()
  
    var isHotUpdate = !isFirstCompilation
    isFirstCompilation = false
    hasCompileErrors = false
  
    // Attempt to apply hot updates or reload.
    if (isHotUpdate) {
      tryApplyUpdates(function onHotUpdateSuccess() {
        // Only dismiss it when we're sure it's a hot update.
        // Otherwise it would flicker right before the reload.
        ErrorOverlay.dismissBuildError()
      })
    }
  }
docs: Successful compilation.