React Noob – thought I’d ask here for a quick answer before I spend hours digging. In the example below I have an event listener inside useEffect that listens for scroll position on a container and fires a trigger after a point if it hasn’t done so already. I want to know why the event still triggers even though the
Tag: react-dom
Adding multiple elements issue using ReactDOM.render in react js
I am new to react js and i am trying to add HTML elements multiple times using ReactDOM.render but when I add elements to the dom multiple times the element is replaced each time not added one by one as a new element this is my code: Answer you can use ReactDOM.createPortal inside of ReactDOM.render like this
Why my green border doesn’t toggle?(disappear)
Why I can’t toggle the className in each div? I want to give each div a green border when I double click on h1 tag inside each div and when I double click again I want border to disapper I put image for you to understand my situation If you don’t get the problem comment under the question Answer Check
How to map JSON data in react js?
I want to map JSON data in key-value manner. I tried it doing on stackblitz but it is showing error. THE CODE I WROTE: THE ERROR I AM GETTING IS: Error in /turbo_modules/react-dom@17.0.0/cjs/react-dom.development.js (26083:13) Target container is not a DOM element. https://stackblitz.com/edit/react-lyrp91 Answer You must export default react components. I got it working in a sandbox (link), by changing this
Next.js PDFtron Webviewer – ReferenceError: window is not defined
I’m trying to create a PDF viewer on my nextjs static page but i dont know how! hope you guys can help me solving this error or showing one other way to do this. (I’m new to Next.js) I was following this working example here index.js viewer.js Answer WebViewer needs the window object to work. In nextjs there is a
React Dom not updating after updating a state array
so this function updates this state array: let [Produits, setProduit] = useState(JSON.parse(Devis.produits)) the array did update without any problem but the changes aren’t getting re-rendered as you can see i’m loggin to the console to check if that line is getting executed and it does ! but the values rendered doesn’t update ! Answer Don’t mutate state, do this instead:
Text Sliders front-end using React
I’m learning basics of react and currently im exploring certain problem statements available on the internet. One such problem statement required me to create a react app for a text slide creator with previous , next and reset buttons. I was able to create till here – My app.js file looks something like this- and my SlideComponent.js looks something like
Is it safe to render a react portal into another component DOM?
Consider the following example: Is it safe to render a portal inside other components DOM? I’ve tested it and it works, but I don’t know if this is reliable. The Portals doc mention that you can render a portal in a DOM node but nothing about components DOM. Why is this different (speculating here)? while updating the portal parent component,