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Código da Vídeo sobre React com typescript
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import { useState } from "react"; | |
import "./App.css"; | |
type TypographyProps = { | |
children: React.ReactNode; | |
size?: "small" | "large"; | |
}; | |
type ParagraphProps = { | |
color: string; | |
}; | |
const Paragraph = ({ | |
children, | |
size, | |
color, | |
}: TypographyProps & ParagraphProps) => { | |
return ( | |
<h1 | |
style={{ | |
fontSize: size === "small" ? "1.5rem" : "3rem", | |
color: color, | |
}} | |
> | |
{children} | |
</h1> | |
); | |
}; | |
const Title = ({ children, size }: TypographyProps) => { | |
return ( | |
<h1 | |
style={{ | |
fontSize: size === "small" ? "1.5rem" : "3rem", | |
}} | |
> | |
{children} | |
</h1> | |
); | |
}; | |
const titleDefaultProps = { | |
size: "small", | |
}; | |
Title.defaultProps = titleDefaultProps; | |
const user = { | |
id: 1, | |
name: "John Doe", | |
age: 30, | |
isAdmin: true, | |
birthDate: new Date("1980-01-01"), | |
}; | |
type UserAttributes = typeof user; | |
function sumNumbers(a: number, b: number) { | |
return a + b; | |
} | |
function List<ItemType>({ | |
items, | |
render, | |
}: { | |
items: ItemType[]; | |
render: (item: ItemType, index: number) => React.ReactNode; | |
}) { | |
return ( | |
<ul> | |
{items.map((item, index) => { | |
return render(item, index); | |
})} | |
</ul> | |
); | |
} | |
function App() { | |
const [count, setCount] = useState<number | null>(null); | |
if (count !== null) { | |
return <div>{count}</div>; | |
} | |
const items = [ | |
{ | |
code: 1, | |
name: "John Doe", | |
}, | |
{ | |
code: 2, | |
name: "Jane Doe", | |
}, | |
]; | |
return ( | |
<div className="App"> | |
<Title> | |
<span> | |
Hello <b>World</b> | |
</span> | |
</Title> | |
<Paragraph color="red" size="small"> | |
Eu sou um parágrafo | |
</Paragraph> | |
<List | |
items={items} | |
render={(item, index) => { | |
if (item.code === 1) { | |
return <p>{item.name}</p>; | |
} | |
return <h3>{item.name}</h3>; | |
}} | |
/> | |
</div> | |
); | |
} | |
export default App; |
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