score:2
is there a explanation about this?
the issue you are seeing is due to the fact that key
and ref
are special props.
see
most props on a jsx element are passed on to the component, however, there are two special props (ref and key) which are used by react, and are thus not forwarded to the component.
for instance, attempting to access this.props.key from a component (i.e., the render function or proptypes) is not defined. if you need to access the same value within the child component, you should pass it as a different prop (ex:
<listitemwrapper key={result.id} id={result.id} />
). while this may seem redundant, it’s important to separate app logic from reconciling hints.
to access ref in child pass it in a different prop.
say you create a ref
like
const ref = react.createref();
and then you pass it to your component as shown below:
<fancybutton forwardedref={ref} text="click me!" />
where inside the fancybutton
the ref will be available as
<button
onclick={() => {
this.logref(forwardedref);
}}
ref={forwardedref}
>
{text}
</button>
where logref
is defined as
logref(myref) {
console.log(myref.current);
}
a working example can be seen at (click on the button and check the console) : https://codesandbox.io/s/ko6wnrorv
score:0
ref does not behave like a regular props. it has a special meaning.
class a extends react.component{
render(){
return <b
ref={ref=>this.bref = ref}
/>
}
}
what it means here is, you are getting a reference of component 'b' in component 'a'. that is, you can use this.bref to call some methods in component 'b' from component 'a'
note: this.bref will get it's value only after a and b is rendered until then it will be undefined.
Source: stackoverflow.com
Related Query
- Why is ref not a property in children components?
- forwarding ref to react.FC gives type error: Property ref does not exist on type 'IntrinsicAttributes & Props & { children :? ReactNode}
- ts(2322) Property children does not exist on type 'Intrinsic attributes and Props'
- Why can I not nest Route components in react-router 4.x?
- TypeScript: Property 'checked' does not exist on type 'EventTarget & Element'. Why it doesn't exist?
- why onChange event does not have event.keyCode property in react?
- Why does React say not to set 'selected' property on <option> elements?
- why activeClassName property in NavLink is not working in 6.0.2 version of react router?
- Why am I getting error TS2339 on querySelectorAll for checkbox property 'checked' does not exist
- TypeError: Cannot read property 'Countries' of undefined. Why an array of objects is not recognized and is not filtered?
- stored ref object in reducer, does not have offsetTop property
- gatsbyjs, reactjs - why components are rendering twice and images do not appear?
- Why does React re-renders children when props does not change?
- ReactJS high order components not forwarding property in a render loop
- Why are these children as array not rendered in TS?
- Why objects are not valid as react children? What are valid children in react and why?
- Getting TypeError: Cannot read property 'localeCompare' of undefined for my sortBy function in my React component and I'm not sure why
- Children of components to do not get rendered
- Reactjs state changes do not propagate to dynamically-created children components
- What is the proper way of communicating between components in react? Why not using refs everywhere?
- Why does iterating through an ES6 Map not create any children elements in ReactJS?
- Property 'setTabChange' does not exist on type 'never'. (React hooks Typescript) using ref
- I just used react context, why does static context not work if I console on other components
- Why can I nest Styled Components but not ordinary React Components
- React: Why are these components not updated when useState changes? (components rendered after the app is mounted)
- Why my Tailwind components library 'FlowBite' is not working?
- How to fix "Uncaught Error: Objects are not valid as a React child" when passing objects, obtained from the blockchain, to the children components
- Property 'then' does not exist on type 'RelayObservable<unknown>'. when I try to fetch data using relay in react. I don't know why this error come
- Unable to set ref due to error "TS2339: Property 'X' does not exist on type 'Y' " inside a react component
- Children do not update on props change via Ref
More Query from same tag
- redux-form How to have initial value in the input field
- Nested object destructuring with computed object property names - react state
- Passing object literal styled component
- how to make an axios get server side call then send to client
- Asserting that dynamic class name is not present
- How to return the first object of array in reactjs
- React hooks : how to watch changes in a JS class object?
- NextJS app temporarily shows restricted route component
- Add script tag to React component without using props or context in NextJS
- setState is not called
- Get updated variable from within react hook before return
- Babel not using react preset set in babelrc
- Is it normal Redux removes a local state in this situation?
- React hooks throwing invariant violations in production build only
- Spotify API, can't chain two API calls properly
- Countdown Timer using functional component in ReactJS doesn't work properly
- do I need two useEffect for mount and state change?
- Attach a property to a functional component wrapped with React.forwardRef
- TypeError: Products.find is not a function in( react/typescript)
- how to use recursive function call in react, which return some array?
- How to preserve props of original html element when using styled components?
- Why display flex has no effect on body in reactJS?
- Map sibling thead & tbody elements in React
- why do my redux- persist lose data on reload?
- How to bind the selected option from the drop down to a reactjs state property in functional component and show it to side of the dropdown
- Compiling ES6 React code using laravel-mix
- list elements are not rendered in react
- GAE web.xml to fallback to React-Router
- How to have a common state between two React custom Hooks?
- Match and Param object in Next.js router for Server side rendering