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Entendendo JavaScript Promises

Nicholas C. Zakas and Daniel Schmitz

Saiba tudo sobre Promises do JavaScript com o autor veterano de JavaScript Nicholas C. Zakas.

This book is a translation into Portuguese (Brazilian) of Understanding JavaScript Promises which was originally written in English

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About

About

About the Book

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

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JavaScriptNode.jsDenoWeb Development

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This book is a translation into Portuguese (Brazilian) of Understanding JavaScript Promises which was originally written in English

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Author

About the Authors

Nicholas C. Zakas

Nicholas C. Zakas is an independent software engineer, consultant, coach, and has authored over a dozen books. He created the ESLint open source project and has worked on everything from small websites to massive-scale web applications. He has worked at Box as a principal architect and Yahoo as a presentation architect. Nicholas is a strong advocate for development best practices including progressive enhancement, accessibility, performance, scalability, and maintainability.

Daniel Schmitz

Daniel Schmitz is a software developer and writer. He's originally from Brazil and has published several books in Portuguese/English.

Contents

Table of Contents

Introdução

  1. Sobre este Livro
  2. Agradecimentos
  3. Sobre o Autor
  4. Sobre o Tradutor
  5. Isenção de Responsabilidade

1. O Básico em Promises

  1. O Ciclo de Vida de uma Promise
  2. Criando Novas Promises Incompletas
  3. Criando Promises Completas
  4. Conclusão

2. Encadeando Promises

  1. Lidando com Erros
  2. Usando finally() em Cadeias de Promises
  3. Retornando Valores em um Encadeamento de Promises
  4. Retornando Promise em Encadeamento de Promises
  5. Conclusão

3. Trabalhando com Múltiplas Promises

  1. O Método Promise.all()
  2. O Método Promise.allSettled()
  3. O Método Promise.any()
  4. O Método Promise.race()
  5. Resumo

4. Funções Async e Expressões Await

  1. Definindo Funções Async
  2. O Que Torna as Funções Async Diferentes
  3. Resumo

5. Lidando com Rejeições sem Tratamento

  1. Detecção de Rejeições sem Tratamento
  2. Lidando Com Rejeições Não Tratadas no Web Browser
  3. Lidando Com Rejeições Sem Tratamento No Node.js
  4. Resumo

Pensamentos Finais

  1. Download de Extras
  2. Apoie o Autor
  3. Ajuda e Suporte
  4. Siga o Autor

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