Entendendo JavaScript Promises
Entendendo JavaScript Promises
Sobre o Livro
Desde que as Promises foram adicionadas ao JavaScript em 2015, elas se tornaram parte integrante da linguagem. Uma boa compreensão de como as Promises funcionam é mais importante do que nunca para se tornar um desenvolvedor proficiente do JavaScript. Este livro foi escrito para introduzir as Promises e suas complexidades em um formato simples e fácil de ler. Cada capítulo é preenchido com exemplos práticos e reais, usando as técnicas discutidas, e todos os exemplos estão disponíveis para download com sua compra.
O que você vai aprender:
- Quais partes das Promises são síncronas e quais são assíncronas
- Como utilizar eficazmente cadeias de Promises para simplificar seu código
- A melhor maneira de capturar erros nas Promises
- Como criar suas próprias Promises
- Formas de trabalhar com múltiplas Promises ao mesmo tempo
- Uso das as expressões async/await para facilitar o uso das Promises
- O que acontece com as Promises rejeitadas sem os manipuladores de rejeição
Sobre os Autores
Sumário
-
Introdução
- Sobre este Livro
- Agradecimentos
- Sobre o Autor
- Sobre o Tradutor
- Isenção de Responsabilidade
-
1. O Básico em Promises
- O Ciclo de Vida de uma Promise
- Criando Novas Promises Incompletas
- Criando Promises Completas
- Conclusão
-
2. Encadeando Promises
- Lidando com Erros
- Usando finally() em Cadeias de Promises
- Retornando Valores em um Encadeamento de Promises
- Retornando Promise em Encadeamento de Promises
- Conclusão
-
3. Trabalhando com Múltiplas Promises
- O Método Promise.all()
- O Método Promise.allSettled()
- O Método Promise.any()
- O Método Promise.race()
- Resumo
-
4. Funções Async e Expressões Await
- Definindo Funções Async
- O Que Torna as Funções Async Diferentes
- Resumo
-
5. Lidando com Rejeições sem Tratamento
- Detecção de Rejeições sem Tratamento
- Lidando Com Rejeições Não Tratadas no Web Browser
- Lidando Com Rejeições Sem Tratamento No Node.js
- Resumo
-
Pensamentos Finais
- Download de Extras
- Apoie o Autor
- Ajuda e Suporte
- Siga o Autor
- Notes
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