JavaScript Dicas Incríveis
JavaScript Dicas Incríveis
Uma coleção de dicas e truques úteis para JavaScript
Sobre o Livro
Nesse cookbook minimalista, conheça um compilado de dicas e truques úteis para você aplicar no JavaScript/Node.js, em cada dica, é apresentado um problema com respectivas soluções através de muito código prático.
Este é um livro para quem já esta familiarizado com JavaScript ou pelo menos tem noções básicas e quer se aprofundar mais, aprendendo desde hacks antigos do ES5, até chegar em soluções modernas do ES6, ES7, ES8, ES9 e ES10
Essa é uma versão traduzida do ebook: JavaScript Awesome Tips
Siga-nos no Instagram também, lá compartilhamos dicas e memes!
Reader Testimonials

Anderson Menezes
Livro incrível que valeu cada centavo investido!
Eu achei incrível! Foi válido cada centavo do meu investimento. São dicas extremamente úteis que me fez poupar horas de trabalho e claro aprender muito mais sobre a linguagem.

Evan Cavalcante
Se você é o Batman, esse ebook será seu cinto utilitário
As vezes, como dev, temos reimaginar e reinventar a roda para finalizar algumas tarefas, em muitos casos você cria umas funções helpers e pronto, este ebook do Caio é um cookbook completo para vc se tornar um desenvolvedor melhor aprendendo alguns truques do core JavaScript.

Rodrigo Oler
Um bom cookbook e fácil de entender
Eu gostei desse ebook, cheio de dicas úteis sobre Strings, Number, Arrays e mais, é um bom cookbook e com exemplos fáceis de aprender tanto para iniciantes quanto desenvolvedores mais seniors.
Table of Contents
-
Prefácio
- JavaScript dominando o mundo
- Sobre o público desse livro
- Como ler esse livro
-
Capítulo 1: String Tips
- Criando slug strings usando regex
- Interpolando dados em uma string
- Repetindo strings em uma linha
- Diferenças entre substring() e substr()
- Capitalizando strings
- Editando querystrings no browser
- Três maneiras de converter string para array
- Aplicando replace all
- Pesquisando palavras nos atributos de um objeto
- Extraindo conteúdo de string tags html
-
Capítulo 2: Number Tips
- Convertendo número para moeda nativamente
- Convertendo string para numbers usando operador +
- Convertendo date para numbers usando operador +
- Arredondamento de números usando operador ~~
- Verificando se número é par ou ímpar
- Calculando idade like a boss
-
Capítulo 3: Array Tips
- Seleção aleatória em um array
- Embaralhando itens do array
- Convertendo nodelist para array
- Array trucation
- Ordenação de arrays numéricos em uma linha
- Somente itens únicos no array
- Obtendo a diferença entre dois arrays
- Concatenando múltiplos arrays
- Limpando valores sujos de um array
- Calculando média em uma linha
- Verificando existência de elementos
- Movendo primeiro item para última posição
- Movendo o último item para primeira posição
- Trocando valores entre duas variáveis
- Mapeamento usando Array.from()
- Clonando arrays corretamente
- Flattening arrays nativo
-
Capítulo 4: Object Tips
- Filtragem de atributos com shorthand value
- Combinando objetos
- Número máximo e mínino em uma linha
- Transformando objetos em arrays de chave-valor
-
Capítulo 5: Function Tips
- Tornando atributos obrigatórios
- Quando não usar arrow functions
- Múltiplas funções em paralelo
- Função sleep usando Promises + Async/Await
- Catch binding opcional
-
Capítulo 6: Bônus Tips
- Obtendo dados group objects do Regex
- Use === no lugar de ==
- Simplificando comparações de valores falsos
- null vs undefined
- Explorando módulo console
Authors have earned$9,908,691writing, publishing and selling on Leanpub, earning 80% royalties while saving up to 25 million pounds of CO2 and up to 46,000 trees.
Learn more about writing on Leanpub
A garantia Leanpub incondicional, sem riscos, de 100% de satisfação
Durante 45 dias da data de compra você pode solicitar o reembolso total de qualquer compra Leanpub, em dois cliques. Nós processamos os reembolsos manualmente, então eles podem demorar alguns dias para aparecer. Veja os termos completos.
Free Updates. DRM Free.
If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).
Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets) and MOBI (for Kindle). The formats that a book includes are shown at the top right corner of this page.
Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.
Learn more about Leanpub's ebook formats and where to read them
Top Books
C++ Best Practices
Jason TurnerLevel up your C++, get the tools working for you, eliminate common problems, and move on to more exciting things!
Continuous Delivery Pipelines
Dave FarleyThis practical handbook provides a step-by-step guide for you to get the best continuous delivery pipeline for your software.
OpenIntro Statistics
David Diez, Christopher Barr, Mine Cetinkaya-Rundel, and OpenIntroA complete foundation for Statistics, also serving as a foundation for Data Science.
Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects.
More resources: openintro.org.
C++20
Rainer GrimmC++20 is the next big C++ standard after C++11. As C++11 did it, C++20 changes the way we program modern C++. This change is, in particular, due to the big four of C++20: ranges, coroutines, concepts, and modules.
The book is almost daily updated. These incremental updates ease my interaction with the proofreaders.
Atomic Kotlin
Bruce Eckel and Svetlana IsakovaFor both beginning and experienced programmers! From the author of the multi-award-winning Thinking in C++ and Thinking in Java together with a member of the Kotlin language team comes a book that breaks the concepts into small, easy-to-digest "atoms," along with exercises supported by hints and solutions directly inside IntelliJ IDEA!
Introductory Statistics with Randomization and Simulation
Mine Cetinkaya-Rundel, Christopher Barr, OpenIntro, and David DiezA complete foundation for Statistics, also serving as a foundation for Data Science, that introduces inference using randomization and simulation while covering traditional methods.
Leanpub revenue supports OpenIntro, so we can provide free desk copies to teachers interested in using our books in the classroom.
More resources: openintro.org.
Ansible for DevOps
Jeff GeerlingAnsible is a simple, but powerful, server and configuration management tool. Learn to use Ansible effectively, whether you manage one server—or thousands.
Java OOP Done Right
Alan MellorObject Oriented Programming is still a great way to create clean, maintainable code. But only if you use it right.
This book gives you 25 years of OO best practice, ready to use.
You'll learn to design objects behaviour-first, use TDD to help, then confidently apply Design Patterns, SOLID principles and Refactoring to make clean, crafted code.
Introducing EventStorming
Alberto BrandoliniThe deepest tutorial and explanation about EventStorming, straight from the inventor.
Discrete Mathematics for Computer Science
Alexander Shen, Alexander S. Kulikov, Vladimir Podolskii, and Aleksandr GolovnevThis book supplements the DM for CS Specialization at Coursera and contains many interactive puzzles, autograded quizzes, and code snippets. They are intended to help you to discover important ideas in discrete mathematics on your own. By purchasing the book, you will get all updates of the book free of charge when they are released.
Top Bundles
- #1
Software Architecture for Developers: Volumes 1 & 2 - Technical leadership and communication
2 Books
"Software Architecture for Developers" is a practical and pragmatic guide to modern, lightweight software architecture, specifically aimed at developers. You'll learn:The essence of software architecture.Why the software architecture role should include coding, coaching and collaboration.The things that you really need to think about before... - #2
CCIE Service Provider Ultimate Study Bundle
2 Books
Piotr Jablonski, Lukasz Bromirski, and Nick Russo have joined forces to deliver the only CCIE Service Provider training resource you'll ever need. This bundle contains a detailed and challenging collection of workbook labs, plus an extensively detailed technical reference guide. All of us have earned the CCIE Service Provider certification... - #3
Cisco CCNA 200-301 Complet
4 Books
Ce lot comprend les quatre volumes du guide préparation à l'examen de certification Cisco CCNA 200-301. - #4
Modern C++ by Nicolai Josuttis
2 Books
- #5
CCDE Practical Studies (All labs)
3 Books
CCDE lab - #6
"The C++ Standard Library" and "Concurrency with Modern C++"
2 Books
Get my books "The C++ Standard Library" and "Concurrency with Modern C++" in a bundle. The first book gives you the details you should know about the C++ standard library; the second one dives deeper into concurrency with modern C++. In sum, you get more than 600 pages full of modern C++ and about 250 source files presenting the standard library... - #7
Mastering Containers
2 Books
Docker and Kubernetes are taking the world by storm! These books will get you up-to-speed fast! Docker Deep Dive is over 400 pages long, and covers all objectives on the Docker Certified Associate exam.The Kubernetes Book includes everything you need to get up and running with Kubernetes! - #8
Modern Management Made Easy
3 Books
Read all three Modern Management Made Easy books. Learn to manage yourself, lead and serve others, and lead the organization. - #9
The Future of Digital Health
6 Books
We put together the most popular books from The Medical Futurist to provide a clear picture about the major trends shaping the future of medicine and healthcare. Digital health technologies, artificial intelligence, the future of 20 medical specialties, big pharma, data privacy and how technology giants such as Amazon or Google want to conquer... - #10
Django for Beginners/APIs/Professionals
3 Books