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., React-Query’s useQuery hook provides several powerful options that can help you build flexible and efficient data-fetching solutions in your React applications., 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., 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., I'm learning jQuery, and I'm trying to find a simple code example that will poll an API for a condition. (ie, request a webpage every few seconds and process the results), 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..