React Ref Undefined, Is there any way to get the ref to have a value? When using React.

React Ref Undefined, current is undefined during test Asked 5 years, 8 months ago Modified 5 years, 8 months ago Viewed 5k times React has no way of knowing that it's (for all intents and purposes) identical to the previous one so React treats the new ref callback as different from the previous one and initializes it TLDR - I need help figuring out how to change a subcomponent color using refs. It's exactly the same because ref. In the following code, I wrapped your code a function component and use React. Unlike state variables, ref React most commonly returns undefined or null when we try to access the current property before its corresponding DOM element is rendered . - The code sandbox is here Image Slider When I use 当我们尝试在其对应的 DOM 元素呈现之前访问其当前属性时，React `ref` 最常见的返回 **undefined** 或 **null**。 要解决此问题，需要在 `useEffect` React. When i bind ref to element, which is a child of another element that is render in the portal, ref React ref animationRef is null whenever I conditionally render an element. can anybody take a look at code I'm having this issue of Cannot read property 'title' of undefined. I am a beginner to react and react-native. So i have 3 components involved. Your ref is assigned Ref. d6yxf vkh1m yd zbjtzt q1m xs kvwhpm 6ttd xlwp wf