Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
861 views
in Technique[技术] by (71.8m points)

reactjs - How does the inner function in a HOC get the props

I'm just getting my head around using HOC in React, one thing that is confusing me slightly is, how does my inner function in this example gain access to props as an argument?

const withProps = Component => (
  props => {
    return <Component {...props}/>
  }
)

export default withProps
See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

To add more to what @AliAnarkali said, a HOC returns you a component so when you write like

const EnhancedApp = withProps(App);

EnhancedApp is basically

  const EnhancedApp = props => {
    return <Component {...props}/>
  }

which a functional component and when you render EnhancedApp like

<EnhancedApp onChange={this.onChange} value={this.state.value} />

It is similar to how a functional component receives onChange and value as props and hence in an HOC, the inner function gets the props like this.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...