In this tutorial, we'll develop a secure poll and voting system using PHP and MySQL. This system will allow you to interact with your audience and display a collection of polls. You'll learn to create polls, implement a voting system, delete polls, and display the list of published polls., We’ll call query.fetchNextPage() every 2 minutes while the app is in the foreground. In other words, we will request a new page of data every odd minute in the timeline., Whether you need to poll an API at a regular interval, fetch data in the background, or transform the data before it’s returned to the component, options like refetchInterval, refetchIntervalInBackground, and select make it easy to get the job done., We make use of Placeholder in forms, to show data related to the entity. For example let's say we have an EditUser page and form. We are using Placeholder as an example while viewing this page, to show some interesting live updating status about some thing based on this user., placeholderData: TData | () => TData Optional If set, this value will be used as the placeholder data for this particular query observer while the query is still in the loading data and no initialData has been provided. placeholderData is not persisted to the cache Optional, We make use of Placeholder in forms, to show data related to the entity. For example let's say we have an EditUser page and form. We are using Placeholder as an example while viewing this page, to show some interesting live updating status about some thing based on this user..