getCheckpointIds
The getCheckpointIds method returns an array of the checkpoint Ids being managed by this Checkpoints object.
getCheckpointIds(): CheckpointIds| returns | CheckpointIds | A |
|---|
The returned CheckpointIds array contains 'backward' checkpoint Ids, the current checkpoint Id (if present), and the 'forward' checkpointIds. Together, these are sufficient to understand the state of the Checkpoints object and what movement is possible backward or forward through the checkpoint stack.
Example
This example creates a Store, adds a Checkpoints object, and then gets the Ids of the checkpoints as it sets them and moves around the stack.
const store = createStore().setTables({pets: {fido: {sold: false}}});
const checkpoints = createCheckpoints(store);
console.log(checkpoints.getCheckpointIds());
// -> [[], '0', []]
store.setCell('pets', 'fido', 'sold', true);
checkpoints.addCheckpoint('sale');
console.log(checkpoints.getCheckpointIds());
// -> [['0'], '1', []]
checkpoints.goBackward();
console.log(checkpoints.getCheckpointIds());
// -> [[], '0', ['1']]
checkpoints.goForward();
console.log(checkpoints.getCheckpointIds());
// -> [['0'], '1', []]