Pass props to all instances of same component

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In my React app I am conditionally rendering views depending on which button is clicked in my menu component by passing the a changeView method as props from the parent to the menu. The current view is stored as state in the parent component.

I also want to use this same changeView method to control a button in each conditionally rendered view to go back to the menu on click.

I am currently achieving this as so:

render() {
  let view;
  switch(this.state.view) {
    case 0:
      view = (<Menu changeView={this.changeView} />);
      break;
    case 1:
      view = (<View changeView={this.changeView}>Test 1</View>);
      break;
    case 2:
      view = (<View changeView={this.changeView}>Test 2</View>);
      break;
    default:
      view = (<View changeView={this.changeView}>An error has ocurred!</View>);
  }

  return (
    <div>
      {view}
    </div>
  );
}

As you can see I am having to pass the changeView method individually to each instance of the View component. Is there any way to set up the View component so that every instance is passed the changeView prop without me having to explicitly declare it each time?

You could change your switch to just change copy and component if needed instead.

render() {
  let copy = "";
  let Component = View;

  switch (this.state.view) {
    case 0:
      Component = Menu;
      break;
    case 1:
      copy = "Test 1";
      break;
    case 2:
      copy = "Test 2";
      break;
    default:
      copy = "An error has ocurred!";
  }

  return (
    <div>
      <Component changeView={this.changeView}>{copy}</Component>
    </div>
  );
}

Render Props – React, After all, props are only used to pass data from one component to For instance, the same pattern applies for having page components in your  After all, props are only used to pass data from one component to another component React, but only from parent to child components down the component tree. React Props vs. State Passing only props from component to component doesn't make the component interactive, because nothing is there to change the props.

Try moving the switch statement inside the View component

render() {
  return (
    <div>
      {this.state.view === 0 && <Menu changeView={this.changeView} />}
      {this.state.view > 0 && <View changeView={this.changeView}>
      {() => {
        switch (this.state.view) {
          case 1:
            return 'Test 1';
          case 2:
            return 'Test 2';
          default:
            return 'An error has ocurred!';
        }
      }}
      </View>
    </div>
  );
}

How to pass props to components in React, How to Pass Props Object from Child Component to Parent Component in React's HelloReact component via the this instance of our HelloReact class. Also, state can be passed down as props to any child component. component and at the same time, we can pass it to any of the child components. If we want to pass data from one page to the other, we can lift up the state to the parent component (in most cases, the App component). The parent would have all the individual page components as its child. Thus, the data will be managed as state in the topmost level component and at the same time, we can pass it to any of the child components.

You can create a function to do that for you,

getView(Component, children){
    return <Component changeView = {this.changeView}>{children}</Component>
}

render() {
  let view;
  switch(this.state.view) {
    case 0:
      view = getView(Menu)
      break;
    case 1:
      view = getView(View,'Test 1')
      break;
    case 2:
      view = getView(View,'Test 2')
      break;
    default:
      view = getView(View,'An error has ocurred!');
  }

  return (
    <div>
      {view}
    </div>
  );
}

Props!, Using context, we can avoid passing props through intermediate elements: Any component can read it, no matter how deep it is. Changes are determined by comparing the new and old values using the same algorithm as Object.is . Note. I have 3 instances of same component (very similar to the VisibleTodoList example) where this component has a selector that relies on the given "prop" value to get the state. The only difference is each instance resides under different parent components. Based on the VisibleTodoList example, I created makeMapStateToProps that looks like this:-

All you need is the changing text inside the view. Move the text to an array outside of the component, and select the text by the view index or fallback to the error:

const text = ['', 'Test 1', 'Test 2'];

class Demo extends React.Component {
  state = {
    view: 1
  }

  render() {  
    const { view } = this.state;
    const text = text[view] || 'An error has ocurred!';

    return (
      <div>
        {view === 0 ?
          <Menu changeView={this.changeView} />
          :
          <View changeView={this.changeView}>{text}</View>
        }             
      </div>
    );
  }
}

How to Pass Props Object from Child Component to Parent , Most props on a JSX element are passed on to the component, however, there For instance, attempting to access this.props.key from a component (i.e., the the same value within the child component, you should pass it as a different prop​  instead, you want to pass all the props, regardless of their name. You can do so with the spread operator : const IntermediateComponent = (props) => { return (< ChildComponent { props } />) }

Context – React, No way to update props on same component instance like enzyme's but I have all tests passing using react-testing-library (at least all the  Let’s take as an example the vuetify’s button component, one of the simplest ones. Say that we want to pass the same bunch of props in most cases: <v-btn color='primary' href='https://alligator.io' small outline block ripple > Hello Meat </v-btn>.

Special Props Warning – React, Learn how props allows you to write pre-configurable components. In ReactDOM.render we'll also need to pass in <Liquid /> instead of <Water /> . With that out of the way, lets figure out how to actually make this component reusable with any liquid's Lets spin up two instances of this component — one will have water's  1. Using Props To Share Data From Parent To Child. VueJS props are the simplest way to share data between components. Props are custom attributes that we can give to a component. Then, in our template, we can give those attributes values and — BAM — we’re passing data from a parent to a child component!

Change props on same component instance · Issue #65 · testing , styled-components v5 does not introduce any breaking public API changes, and styled component <Button /> would render with the same static class every time​. component to have that prop, and pass props directly when every instance  The simplest way to define a component is to write a JavaScript function: function Welcome (props) { return < h1 > Hello, { props. name } </ h1 > ; } This function is a valid React component because it accepts a single “props” (which stands for properties) object argument with data and returns a React element.

Comments
  • This is perfect. Thanks!
  • @SamWalpole Great! You're welcome.
  • for case 0 component is Menu not View
  • @dotconnor Thanks for the help. I think Tholle's answer is more elegant though.