Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
new version of context in React 16.3
Search
sota ohara
March 30, 2018
3
1.7k
new version of context in React 16.3
sota ohara
March 30, 2018
Tweet
Share
More Decks by sota ohara
See All by sota ohara
Re-Architecture of ReactNative
sottar
0
260
Implement prerendering w/ puppeteer
sottar
1
280
create own CMS from scratch
sottar
2
9k
Let’s try to hack AST of JavaScript
sottar
1
1.7k
フロントエンドエンジニアが伝えたい最近の事情
sottar
28
18k
複数人で高速に開発するためのnpmモジュール
sottar
5
2.6k
2ヶ月半でサービスをリリースした話し
sottar
2
2.2k
Redux のディレクトリ構成を考える
sottar
2
15k
モダンなJavaScriptアプリケーションでモダンにスタイリングする方法
sottar
9
5k
Featured
See All Featured
A Modern Web Designer's Workflow
chriscoyier
694
190k
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
53
2.8k
Building Better People: How to give real-time feedback that sticks.
wjessup
367
19k
Measuring & Analyzing Core Web Vitals
bluesmoon
7
500
Helping Users Find Their Own Way: Creating Modern Search Experiences
danielanewman
29
2.7k
Into the Great Unknown - MozCon
thekraken
39
1.9k
Statistics for Hackers
jakevdp
799
220k
Java REST API Framework Comparison - PWX 2021
mraible
31
8.7k
Testing 201, or: Great Expectations
jmmastey
42
7.6k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3.1k
Embracing the Ebb and Flow
colly
86
4.7k
Why You Should Never Use an ORM
jnunemaker
PRO
58
9.4k
Transcript
new version of context in React 16.3 - We Are
JavaScripters! @17th Mercari, inc. Frontend Engineer Sota Ohara
about me Sota Ohara / sottar Mercari, inc. / Souzoh,
inc. Frontend Engineer mercari NOW, CSTool @sottar_ sottar
React v16.3 is upcoming
React v16.3 is upcoming React v16.3 has released
React v16.3 has released https://twitter.com/reactjs/status/979458172833357825
• New life-cycle methods The functions that will be deprecated
are: • componentWillMount • componentWillUpdate • componentWillReceiveProps New method is: • static getDerivedStateFromProps • StrictMode API • AsyncMode • Update React DevTools • Update Context API ….. What’s new in React v16.3
New context API
• Typically, data in a React application is passed top-
down (parent to child) via props. • So, we also need to pass the related entire site values each layer components motivation it’s too painful !!
• The value set in the context can be acquired
from any child component. • New component types: Provider and Consumer. • Refer to the ancestor as the provider and the child as the consumer • Providers and consumers come in pairs New context API
Basic Sample
* A provider-consumer pair is created using * requires a
default value React.createContext() React.createContext()
* The provider accepts a context value as a prop
* In the typical scenario, context value has in state. and updated by calling setState. Provider
* The consumer uses a render prop API * In
the typical scenario, context value has in state and updated by calling setState. Consumer
FYI. What’s new in React 16.3(0-alpha) https://medium.com/@baphemot/whats-new-in-react-16-3-d2c9b7b6193b
We are hiring !!