Skip to main content

Interface: HistoryObservers

Observers for tracking history-related changes.

Properties​

currentElement​

currentElement: Observable<number>

The index of the currently active history entry.

This observable emits the index of the current position in the history stack. When the user performs undo/redo operations, this value changes to reflect the new position.

Example​

window.mimeeqApp.observers.history.currentElement.subscribe(({ newValue }) => {
  if (newValue !== undefined) {
    // Assuming you have access to the history stack
    const historyStack = window.mimeeqApp.observers.history.stack.getValue().newValue || [];
    const atStart = newValue <= 0;
    const atEnd = newValue >= historyStack.length - 1;

    document.getElementById('undo-btn').disabled = atStart;
    document.getElementById('redo-btn').disabled = atEnd;
  }
});

stack​

stack: Observable<HistoryStackValue>

The complete history stack of configuration changes.

This observable emits the entire history stack whenever it changes. The stack contains entries for each configuration change made since the configurator was initialized.

Example​

window.mimeeqApp.observers.history.stack.subscribe(({ newValue }) => {
  if (newValue) {
    console.log(`History has ${newValue.length} entries`);
  }
});