Type ‘element[]’ is missing the following properties from type ‘reactelement‘: type, props, key

The error message “type ‘element[]’ is missing the following properties from type ‘reactelement<any, any>’: type, props, key” indicates that a certain array of elements is being treated as a single React element in TypeScript, but it lacks the necessary properties.

In TypeScript, when working with React elements, each element should have a “type”, “props”, and “key” property. These properties are essential for React to render and manage components effectively.

To fix this error, you need to ensure that the array contains valid React elements with the required properties. Here’s an example to illustrate this:

import React, { ReactElement } from 'react';

interface MyComponentProps {
  name: string;
  age: number;
}

function MyComponent(props: MyComponentProps): ReactElement {
  return (
    <div>
      <p>Name: {props.name}</p>
      <p>Age: {props.age}</p>
    </div>
  );
}

const elements: ReactElement[] = [
  <MyComponent key="1" name="John" age={25} />,
  <MyComponent key="2" name="Jane" age={30} />,
];

function App() {
  return <div>{elements}</div>;
}
  

In the example above, we define a component called “MyComponent” that expects “name” and “age” as its props. We then create an array called “elements” of type “ReactElement[]” and populate it with instances of “MyComponent”, each with a unique “key” property.

Finally, in the “App” component, we render the “elements” array within a div using curly braces. This ensures that each “MyComponent” in the array is considered a separate React element, with all the necessary properties.

By adhering to the correct structure and properties for React elements, you can avoid the error “type ‘element[]’ is missing the following properties from type ‘reactelement‘: type, props, key” and ensure proper rendering of your components.