Tag: react-hooks

I am trying to learn hooks and the useState method has made me confused. I am assigning an initial value to a state in the form of an array. The set method in useState is not working for me, both with and without the spread syntax. I have made an API on another PC that I am calling and fetching

My question relates to Javascript mechanisms that make react hooks possible. Recent development in React allows us to create hooks, ie. for React state, within as simple function like: The hook useState returns an array with an accessor and a mutator, and we use them by array decomposition inside our App function. So under the hood, the hook looks something

I’m playing around with React Hooks and am facing a problem. It shows the wrong state when I’m trying to console log it using a button handled by event listener. CodeSandbox: https://codesandbox.io/s/lrxw1wr97m Click on ‘Add card’ button 2 times In first card, click on Button1 and see in console that there are 2 cards in state (correct behaviour) In first

I’m trying React hooks for the first time and all seemed good until I realised that when I get data and update two different state variables (data and loading flag), my component (a data table) is rendered twice, even though both calls to the state updater are happening in the same function. Here is my api function which is returning

According to the docs: componentDidUpdate() is invoked immediately after updating occurs. This method is not called for the initial render. We can use the new useEffect() hook to simulate componentDidUpdate(), but it seems like useEffect() is being ran after every render, even the first time. How do I get it to not run on initial render? As you can see