spark.worker.hasPersisted

function hasPersisted(key: string): boolean

Check if a value is already persisted.

Useful for conditional initialization or testing whether a value survived a hot reload.

Parameters

boolean– True if the value exists in persistent storage

if (spark.hasPersisted('model')) {
  console.log('Model survived hot reload');
} else {
  console.log('Model was recreated');
}

function hasPersisted(key: string): boolean

Check if a value is already persisted.

Useful for conditional initialization or testing whether a value survived a hot reload.

boolean– True if the value exists in persistent storage

if (spark.hasPersisted('model')) {
  console.log('Model survived hot reload');
} else {
  console.log('Model was recreated');
}