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Merged
Carolis merged 2 commits into from
Oct 1, 2020
Merged

feat: explica e exemplifica readonly props #9

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feat: explica e exemplifica readonly props
navawho Oct 1, 2020
f13b927
Merge branch 'master' into feature/readonly-props
navawho Oct 1, 2020
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17 changes: 17 additions & 0 deletions README.md
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Expand Up @@ -426,6 +426,22 @@ interface Programador extends Pessoa {
tomarCafe(): void;
}

// utilizamos readonly para propriedades que são apenas para leitura
// elas disparam erro quando se tenta atualizá-las após definida

interface Identidade {
readonly rg: string;
emissor: string;
}

const minhaIdentidade: Identidade = {
rg: "0123456789",
emissor: "SSP"
}

minhaIdentidade.emissor = "CREA";
minhaIdentidade.rg = "9876543210" // dispara erro

// Quando queremos omitir algumas propriedades K de uma interface T podemos utilizar o Omit:

interface Veiculo {
Expand All @@ -443,6 +459,7 @@ const minhaBike: Bicicleta = {
};

```

## Typescript + React

É possível inicializar um projeto react com um template para typescript de várias formas, uma delas se utilizando do create-react-app específico para o typescript, usando os seguintes comandos:
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