Solid Example: CreateBatcher

Github StackBlitz CodeSandbox

import { For, createSignal } from 'solid-js'
import { render } from 'solid-js/web'
import { createBatcher } from '@tanstack/solid-pacer/batcher'

function App1() {
  const [processedBatches, setProcessedBatches] = createSignal<
    Array<Array<number>>
  >([])

  // Create the batcher instance
  const batcher = createBatcher(
    (items: Array<number>) => {
      setProcessedBatches((prev) => [...prev, items])
      console.log('Processing batch', items)
    },
    {
      maxSize: 5,
      wait: 3000,
      getShouldExecute: (items) => items.includes(42),
    },
    // Alternative to batcher.Subscribe: pass a selector as 3rd arg to track state and subscribe to updates
    // (state) => state,
  )

  return (
    <div>
      <h1>TanStack Pacer createBatcher Example 1</h1>
      <batcher.Subscribe
        selector={(state) => ({
          size: state.size,
          items: state.items,
          executionCount: state.executionCount,
          totalItemsProcessed: state.totalItemsProcessed,
        })}
      >
        {(state) => (
          <>
            <div>Batch Size: {state().size}</div>
            <div>Batch Max Size: {5}</div>
            <div>Batch Items: {state().items.join(', ')}</div>
            <div>Batches Processed: {state().executionCount}</div>
            <div>Items Processed: {state().totalItemsProcessed}</div>
            <div>
              Processed Batches:{' '}
              <For each={processedBatches()}>
                {(b) => <span>[{b.join(', ')}], </span>}
              </For>
            </div>
            <div
              style={{
                display: 'grid',
                'grid-template-columns': 'repeat(2, 1fr)',
                gap: '8px',
                'max-width': '600px',
                margin: '16px 0',
              }}
            >
              <button
                onClick={() => {
                  const nextNumber = state().items.length
                    ? state().items[state().items.length - 1] + 1
                    : 1
                  batcher.addItem(nextNumber)
                }}
              >
                Add Number
              </button>
              <button
                disabled={state().size === 0}
                onClick={() => {
                  batcher.flush()
                }}
              >
                Process Current Batch
              </button>
            </div>
          </>
        )}
      </batcher.Subscribe>
      <batcher.Subscribe selector={(state) => state}>
        {(state) => (
          <pre style={{ 'margin-top': '20px' }}>
            {JSON.stringify(state, null, 2)}
          </pre>
        )}
      </batcher.Subscribe>
    </div>
  )
}

render(
  () => (
    <div>
      <App1 />
    </div>
  ),
  document.getElementById('root')!,
)