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React Functional Components using TSX

jwp profile image John Peters ・1 min read

Today I wanted to see how to create a React Functional Component using Typescript.

Here's the rules.

Typescript Functional Components

  • Function files must have a tsx suffix.
  • In that tsx file:
    • Import the type of FC and perhaps UseState hook.
// FC = Functional Component
import React, { FC, useState }
 from "react";
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  • Create a property prototype
// allows HTML binding to a title property
type props = {
  title: string;
}; 
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  • Create the function
const Test: FC<props> = ({ title }) => {
  const [hidden, setDisplay] = useState(false);
  function toggleVisibility() {
     hidden===true?setDisplay(false)
     :setDisplay(true);
  }

  return (
    <div>
      <h3 hidden={hidden}>{title}!</h3>
      <button onClick={toggleVisibility}>Toggle visibility</button>
    </div>
  );
};
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Don't forget this part at the end of the file:

// Makes it a module
export default Test;
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Consumer
Import the component first:

import Test from "./fileName";
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Then use it like this:

    <Test title="Yes it works!"></Test> 
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For this simple example, we gain very little advantage for the effort.

This is all we gain on the caller side if we're looking for properties.

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2.5 Stars for TSX

P.S.

  • TSConfig.json should look similar to this:
{
    "compilerOptions": {
        "outDir": "./dist/",
        "sourceMap": true,
        "strict": true,
        "noImplicitReturns": true,
        "noImplicitAny": true,
        "module": "es6",
        "moduleResolution": "node",
        "target": "es5",
        "allowJs": true,
        "jsx": "react",
        "allowSyntheticDefaultImports": true,
    },
    "include": [
        "./src/**/*",
        "./src/public/**/*",
        "src/custom.d.ts"
    ]
}
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JWP2021 TSX

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