Solid Example: CreateDebouncer

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import { PacerProvider } from '@tanstack/solid-pacer/provider'
import { createSignal } from 'solid-js'
import { render } from 'solid-js/web'
import { createDebouncer } from '@tanstack/solid-pacer/debouncer'

function App1() {
  // Use your state management library of choice
  const [instantCount, setInstantCount] = createSignal(0)
  const [debouncedCount, setDebouncedCount] = createSignal(0)

  // Lower-level createDebouncer hook - requires you to manage your own state
  const setCountDebouncer = createDebouncer(
    setDebouncedCount,
    {
      wait: 800,
      get enabled() {
        return instantCount() > 2
      }, // optional, defaults to true
      // leading: true, // optional, defaults to false
    },
    // Alternative to setCountDebouncer.Subscribe: pass a selector as 3rd arg to track state and subscribe to updates
    // (state) => state,
  )

  function increment() {
    const newInstantCount = instantCount() + 1
    setInstantCount(newInstantCount)
    setCountDebouncer.maybeExecute(newInstantCount) // debounced state update
  }

  return (
    <div>
      <h1>TanStack Pacer createDebouncer Example 1</h1>
      <table>
        <tbody>
          <setCountDebouncer.Subscribe
            selector={(state) => ({
              status: state.status,
              executionCount: state.executionCount,
            })}
          >
            {(state) => (
              <>
                <tr>
                  <td>Status:</td>
                  <td>{state().status}</td>
                </tr>
                <tr>
                  <td>Execution Count:</td>
                  <td>{state().executionCount}</td>
                </tr>
                <tr>
                  <td colSpan={2}>
                    <hr />
                  </td>
                </tr>
                <tr>
                  <td>Instant Count:</td>
                  <td>{instantCount()}</td>
                </tr>
                <tr>
                  <td>Debounced Count:</td>
                  <td>{debouncedCount()}</td>
                </tr>
              </>
            )}
          </setCountDebouncer.Subscribe>
        </tbody>
      </table>
      <div>
        <button onClick={increment}>Increment</button>
        <button
          onClick={() => setCountDebouncer.flush()}
          style={{ 'margin-left': '10px' }}
        >
          Flush
        </button>
      </div>
      <setCountDebouncer.Subscribe selector={(state) => state}>
        {(state) => (
          <pre style={{ 'margin-top': '20px' }}>
            {JSON.stringify(state(), null, 2)}
          </pre>
        )}
      </setCountDebouncer.Subscribe>
    </div>
  )
}

function App2() {
  const [searchText, setSearchText] = createSignal('')
  const [debouncedSearchText, setDebouncedSearchText] = createSignal('')

  // Lower-level createDebouncer hook - requires you to manage your own state
  const setSearchDebouncer = createDebouncer(
    setDebouncedSearchText,
    {
      wait: 500,
      get enabled() {
        return searchText().length > 2
      }, // optional, defaults to true
    },
    // Alternative to setSearchDebouncer.Subscribe: pass a selector as 3rd arg to track state and subscribe to updates
    // (state) => state,
  )

  function handleSearchChange(e: Event) {
    const target = e.target as HTMLInputElement
    const newValue = target.value
    setSearchText(newValue)
    setSearchDebouncer.maybeExecute(newValue)
  }

  return (
    <div>
      <h1>TanStack Pacer createDebouncer Example 2</h1>
      <div>
        <input
          autofocus
          type="search"
          value={searchText()}
          onInput={handleSearchChange}
          placeholder="Type to search..."
          style={{ width: '100%' }}
        />
      </div>
      <table>
        <tbody>
          <setSearchDebouncer.Subscribe
            selector={(state) => ({
              isPending: state.isPending,
              executionCount: state.executionCount,
            })}
          >
            {(state) => (
              <>
                <tr>
                  <td>Is Pending:</td>
                  <td>{state().isPending ? 'Yes' : 'No'}</td>
                </tr>
                <tr>
                  <td>Execution Count:</td>
                  <td>{state().executionCount}</td>
                </tr>
                <tr>
                  <td colSpan={2}>
                    <hr />
                  </td>
                </tr>
                <tr>
                  <td>Instant Search:</td>
                  <td>{searchText()}</td>
                </tr>
                <tr>
                  <td>Debounced Search:</td>
                  <td>{debouncedSearchText()}</td>
                </tr>
              </>
            )}
          </setSearchDebouncer.Subscribe>
        </tbody>
      </table>
      <div>
        <button onClick={() => setSearchDebouncer.flush()}>Flush</button>
      </div>
      <setSearchDebouncer.Subscribe selector={(state) => state}>
        {(state) => (
          <pre style={{ 'margin-top': '20px' }}>
            {JSON.stringify(state(), null, 2)}
          </pre>
        )}
      </setSearchDebouncer.Subscribe>
    </div>
  )
}

function App3() {
  const [currentValue, setCurrentValue] = createSignal(50)
  const [debouncedValue, setDebouncedValue] = createSignal(50)
  const [instantExecutionCount, setInstantExecutionCount] = createSignal(0)
  const [wait, setWait] = createSignal(250)
  const [enabled, setEnabled] = createSignal(true)

  // Lower-level createDebouncer hook - requires you to manage your own state
  const setValueDebouncer = createDebouncer(
    setDebouncedValue,
    {
      get wait() {
        return wait()
      },
      get enabled() {
        return enabled()
      },
    },
    // Alternative to setValueDebouncer.Subscribe: pass a selector as 3rd arg to track state and subscribe to updates
    // (state) => state,
  )

  function handleRangeChange(e: Event) {
    const target = e.target as HTMLInputElement
    const newValue = parseInt(target.value, 10)
    setCurrentValue(newValue)
    setInstantExecutionCount((c) => c + 1)
    setValueDebouncer.maybeExecute(newValue)
  }

  return (
    <div>
      <h1>TanStack Pacer createDebouncer Example 3</h1>
      <fieldset>
        <legend>Reactive options</legend>
        <label>
          Delay: {wait()} ms
          <input
            type="range"
            min="0"
            max="1500"
            step="50"
            value={wait()}
            onInput={(event) => setWait(event.currentTarget.valueAsNumber)}
          />
        </label>
        <label>
          <input
            type="checkbox"
            checked={enabled()}
            onChange={(event) => setEnabled(event.currentTarget.checked)}
          />
          Enabled
        </label>
        <p>
          Changing the delay affects the next scheduled call. Disabling cancels
          pending work.
        </p>
      </fieldset>
      <div style={{ 'margin-bottom': '20px' }}>
        <label>
          Current Range:
          <input
            type="range"
            min="0"
            max="100"
            value={currentValue()}
            onInput={handleRangeChange}
            style={{ width: '100%' }}
          />
          <span>{currentValue()}</span>
        </label>
      </div>
      <div style={{ 'margin-bottom': '20px' }}>
        <label>
          Debounced Range (Readonly):
          <input
            type="range"
            min="0"
            max="100"
            value={debouncedValue()}
            disabled
            style={{ width: '100%' }}
          />
          <span>{debouncedValue()}</span>
        </label>
      </div>
      <table>
        <tbody>
          <setValueDebouncer.Subscribe
            selector={(state) => ({
              isPending: state.isPending,
              executionCount: state.executionCount,
            })}
          >
            {(state) => (
              <>
                <tr>
                  <td>Is Pending:</td>
                  <td>{state().isPending ? 'Yes' : 'No'}</td>
                </tr>
                <tr>
                  <td>Instant Executions:</td>
                  <td>{instantExecutionCount()}</td>
                </tr>
                <tr>
                  <td>Debounced Executions:</td>
                  <td>{state().executionCount}</td>
                </tr>
                <tr>
                  <td>Saved Executions:</td>
                  <td>{instantExecutionCount() - state().executionCount}</td>
                </tr>
                <tr>
                  <td>% Reduction:</td>
                  <td>
                    {instantExecutionCount() === 0
                      ? '0'
                      : Math.round(
                          ((instantExecutionCount() - state().executionCount) /
                            instantExecutionCount()) *
                            100,
                        )}
                    %
                  </td>
                </tr>
              </>
            )}
          </setValueDebouncer.Subscribe>
        </tbody>
      </table>
      <div style={{ color: '#666', 'font-size': '0.9em' }}>
        <p>Debounced with {wait()}ms wait time</p>
      </div>
      <div>
        <button onClick={() => setValueDebouncer.flush()}>Flush</button>
      </div>
      <setValueDebouncer.Subscribe selector={(state) => state}>
        {(state) => (
          <pre style={{ 'margin-top': '20px' }}>
            {JSON.stringify(state(), null, 2)}
          </pre>
        )}
      </setValueDebouncer.Subscribe>
    </div>
  )
}

render(
  () => (
    <PacerProvider>
      <div>
        <App1 />
        <hr />
        <App2 />
        <hr />
        <App3 />
      </div>
    </PacerProvider>
  ),
  document.getElementById('root')!,
)