waitForId example

$result = $page->findField('added_field');
    $this->assertEmpty($result);
    $test_field->click();
    $result = $assert_session->waitForField('added_field');
    $this->assertNotEmpty($result);
    $this->assertInstanceOf(NodeElement::class, $result);

    $result = $page->findById('js_webassert_test_field_id');
    $this->assertEmpty($result);
    $test_id->click();
    $result = $assert_session->waitForId('js_webassert_test_field_id');
    $this->assertNotEmpty($result);
    $this->assertInstanceOf(NodeElement::class, $result);

    // Test waitOnAjaxRequest. Verify the element is available after the wait     // and the behaviors have run on completing by checking the value.     $result = $page->findField('test_assert_wait_on_ajax_input');
    $this->assertEmpty($result);
    $test_wait_on_ajax->click();
    $assert_session->assertWaitOnAjaxRequest();
    $result = $page->findField('test_assert_wait_on_ajax_input');
    $this->assertNotEmpty($result);