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/ answers: 1 / hits: 143922
/ 5 Years ago, wed, january 30, 2019, 12:00:00
The official reactjs.org website contains an excellent introductory tutorial.
The tutorial snippets are written in JavaScript and I am trying to convert these to TypeScript.
I have managed to get the code working but have a question about using interfaces.
What should the correct function signature be for the onClick callback.
Is there a way to replace the 'any' keyword in the IProps_Square interface with an explicit function signature ?
Any help or suggestions would be really appreciated, many thanks Russell
index.html
<!DOCTYPE html>
<html lang=en>
<body>
<div id=reactjs-tutorial></div>
</body>
</html>
index.tsx
import * as React from 'react';
import * as ReactDOM from 'react-dom';
interface IProps_Square {
message: string,
onClick: any,
}
class Square extends React.Component < IProps_Square > {
render() {
return (
<button onClick={this.props.onClick}>
{this.props.message}
</button>
);
}
}
class Game extends React.Component {
render() {
return (
<Square
message = { 'click this' }
onClick = { () => alert('hello') }
/>
);
}
}
ReactDOM.render(
<Game />,
document.getElementById('reactjs-tutorial')
);
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