How to map JSON data in react js?

Question

I want to map JSON data in key-value manner. I tried it doing on stackblitz but it is showing error.

THE CODE I WROTE:

import React from "react";
import ReactDOM from "react-dom";

const sampleJSON = {
  name: "Pluralsight",
  number: 1,
  address: "India",
  website: "https://www.pluralsight.com/"
};

function App() {
  return (
    <div>
      {Object.keys(sampleJSON).map((key, i) => (
        <p key={i}>
          <span>Key Name: {key}</span>
          <span>Value: {sampleJSON[key]}</span>
        </p>
      ))}
    </div>
  );
}

ReactDOM.render(<App />, document.getElementById("app"));

THE ERROR I AM GETTING IS:

Error in /turbo_modules/[email protected]/cjs/react-dom.development.js (26083:13) Target container is not a DOM element.

https://stackblitz.com/edit/react-lyrp91

"I tried it doing on stackblitz", you should share us the stackblitz itself — Dennis Vash
– Dennis Vash, Commented May 3, 2021 at 11:52
You are mapping the object just fine actually. It's the react component that's giving you issues. — Mainly Karma
– Mainly Karma, Commented May 3, 2021 at 11:58
Check if you have element with ID "app" since default CRA div has id "root"/ — Abdulah Proho
– Abdulah Proho, Commented May 3, 2021 at 12:00
Check if MYSTRING is actually an object or it's string. if it's string, then erase stringify and use parse only — Abdulah Proho
– Abdulah Proho, Commented May 3, 2021 at 12:01
Can you please put MYSTRING in your question too what you are getting from Backend? — Surjeet Bhadauriya
– Surjeet Bhadauriya, Commented May 3, 2021 at 12:08

Mainly Karma · Accepted Answer · 2021-05-03 11:56:40Z

2

You must export default react components. I got it working in a sandbox (link), by changing this line

ReactDOM.render(<App />, document.getElementById("app"));

to this

export default App;

answered May 3, 2021 at 11:56

Mainly Karma

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Comments

Surjeet Bhadauriya · Accepted Answer · 2021-05-03 12:09:57Z

You need to export your app component instead of rendering it to the element id app. The problem is it tries to find element id app, but it can't find in the DOM. However index.js do the same thing, so you don't have to do the ReactDOM.render thing.

ReactDOM.render(<App />, document.getElementById("root")); // you will find this line in index.js, you don't need to do this in app.js

Stackblitz Link

import React from "react";

const sampleJSON = {
  name: "Pluralsight",
  number: 1,
  address: "India",
  website: "https://www.pluralsight.com/"
};

export default function App() {
  return (
    <div>
      {Object.keys(sampleJSON).map((key, i) => (
        <p key={i}>
          <span>Key Name: {key}</span>
          <span>Value: {sampleJSON[key]}</span>
        </p>
      ))}
    </div>
  );
}

Blazej Kita · Accepted Answer · 2022-07-28 08:34:02Z

0

You have set state and then in render function add "map" and return html.

  render()
  {
   
    return(
     <div className='training'>
          <div className='items'>
            {
              this.state.training.map( (row,index)=>{
                 return(
                    <h1>{index}</h1>    
                 )                 
              }) 
            }             
          </div>
     </div>
    )
  }
}

answered Jul 28, 2022 at 8:34

Blazej Kita

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