Improve quick info on JSX component elements

TS Template added by @mjbvz

TypeScript Version: 4.4.0-dev.20210713

Search Terms

• react
• prop-types
• jsx

---

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.58.2 (was happening before this version as well)
• OS Version: Mac OS 10.14

Steps to Reproduce:

1. Create a React functional component like this:

import React from "react";
import PropTypes from "prop-types";

//  vscode is able to infer the types correctly in autocomplete
// as this is a functional component, with prop types
// Please note that vscode still does not show the correct types
// when hovering on the component usage

function MyComponent({ prop1, prop2, prop3 }) {
  return (
    <div>
      <span>{prop1}</span>
      <span>{prop2}</span>
    </div>
  );
}

MyComponent.propTypes = {
  prop1: PropTypes.string.isRequired,
  prop2: PropTypes.bool,
  prop3: PropTypes.shape({
    p1: PropTypes.string
  })
};

MyComponent.defaultProps = {
  prop2: false
};

export default MyComponent;

2. At the point of usage, where you have imported this component, hover on the usage, you will see that vscode is able to identify the function signature, but not the types of the function arguments, and shows them as any

3. If you hovber over the specific prop though, you would see that vscode shows the correct type (inferred from prop types) and also provides autocompletion for the prop name. (Although there is still an issue that it shows all the props as optional)

Example:

https://codesandbox.io/s/vscode-intellisense-proptypes-fc-w-destructuring-w-proptypes-cngth?from-embed=&file=/src/MyComponent.js:0-655

Expectation:

I would have expected that

• vscode would be able to infer the types on hovering as well, same as it can do while providing autocomplete suggestion for the prop
• vscode would not show all the props as optional, since it seems that it can infer prop names and types from prop types, it should also be able to infer whether it is required or optional.

Start with the linked CodeSandbox and reproduce the JSX component hover behavior in the TypeScript language service. Compare quick info for the component usage with the prop autocomplete and inferred PropTypes in MyComponent.js. Done means hover shows the inferred prop types and distinguishes required from optional props.