Function scheduleUpdate

packages/react-refresh-utils/internal/helpers.ts:156–195

()

var isUpdateScheduled: boolean = false
// This function aggregates updates from multiple modules into a single React Refresh call.
function scheduleUpdate() {
  if (isUpdateScheduled) {
    return
  }
  isUpdateScheduled = true

  function canApplyUpdate(status: ModuleHotStatus) {
    return status === 'idle'
  }

  function applyUpdate() {
    isUpdateScheduled = false
    try {
      RefreshRuntime.performReactRefresh()
    } catch (err) {
      console.warn(
        'Warning: Failed to re-render. We will retry on the next Fast Refresh event.\n' +
          err
      )
    }
  }

  if (canApplyUpdate(module.hot.status())) {
    // Apply update on the next tick.
    Promise.resolve().then(() => {
      applyUpdate()
    })
    return
  }

  const statusHandler = (status) => {
    if (canApplyUpdate(status)) {
      module.hot.removeStatusHandler(statusHandler)
      applyUpdate()
    }
  }

  // Apply update once the HMR runtime's status is idle.
  module.hot.addStatusHandler(statusHandler)
}

// Needs to be compatible with IE11
export default {