Nevermoi

2018, ReactJS Recap

Since last time I opened reactjs.org, it has been a long time.

1. Context

For example,

const ThemeContext = React.createContext('light');

Then the ThemeContext will have Provider and Consumer ready to use.

refs: ()[https://reactjs.org/docs/context.html]

Personally thought, not good to use.

1. componentDidCatch

This is a good thing, and easily integrated with redux saga

1. Fragments

This is a good thing, something I need to return a list of dom elements, but I dont want to wrap it into a div.

Can do it using return <> <div>I am A</div> <div> I am B </div> <>

1. HOC, Higher-Order Component

Similar to Proxy Pattern, I dont use at least

1. Refs and DOM

Since 16.3, refs API is changed to React.createRef(). Now define refs in constructor and then use it using this

Another way to use it is called callback refs, I personally use this pattern more.