“Cannot read property 'map' of undefined” while doing an import





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0















What is the best way to map over array inside an array when we are importing a local file. I get an error : "Cannot read property 'map' of undefined".



Shop.js



import Details from './details.json'


render(){
return (
<ul>
{Details.map(detail => (
detail.shops.map(shop=> (
<li>{shop}</li>
))
))}
</ul>
)}


Json is like this:



[
{
"id": 1,
"shops": ["one", "two"]
}
]









share|improve this question


















  • 2





    I believe you can't import JSON with the vanilla import/export syntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a .js file and then import it (see this question's answer: stackoverflow.com/questions/34944099/…)

    – Jayce444
    Nov 23 '18 at 19:25








  • 1





    It works as in codesandbox.io/s/13p1k8x2zq. But as Jayce444 said you have to use an appropriate loader for webpack(if you are using webpack), This sandbox is create-react-app based and built in config does that for in sandbox.

    – XPD
    Nov 23 '18 at 19:27













  • xpd: SyntaxError /src/index.js: Unexpected token, expected "}" (18:10) 16 | <li>{shop}</li> 17 | )) > 18 | )); | ^

    – Deke
    Nov 23 '18 at 19:31













  • Is it the warning?

    – XPD
    Nov 23 '18 at 19:33






  • 1





    Sorry check now

    – XPD
    Nov 23 '18 at 19:36


















0















What is the best way to map over array inside an array when we are importing a local file. I get an error : "Cannot read property 'map' of undefined".



Shop.js



import Details from './details.json'


render(){
return (
<ul>
{Details.map(detail => (
detail.shops.map(shop=> (
<li>{shop}</li>
))
))}
</ul>
)}


Json is like this:



[
{
"id": 1,
"shops": ["one", "two"]
}
]









share|improve this question


















  • 2





    I believe you can't import JSON with the vanilla import/export syntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a .js file and then import it (see this question's answer: stackoverflow.com/questions/34944099/…)

    – Jayce444
    Nov 23 '18 at 19:25








  • 1





    It works as in codesandbox.io/s/13p1k8x2zq. But as Jayce444 said you have to use an appropriate loader for webpack(if you are using webpack), This sandbox is create-react-app based and built in config does that for in sandbox.

    – XPD
    Nov 23 '18 at 19:27













  • xpd: SyntaxError /src/index.js: Unexpected token, expected "}" (18:10) 16 | <li>{shop}</li> 17 | )) > 18 | )); | ^

    – Deke
    Nov 23 '18 at 19:31













  • Is it the warning?

    – XPD
    Nov 23 '18 at 19:33






  • 1





    Sorry check now

    – XPD
    Nov 23 '18 at 19:36














0












0








0








What is the best way to map over array inside an array when we are importing a local file. I get an error : "Cannot read property 'map' of undefined".



Shop.js



import Details from './details.json'


render(){
return (
<ul>
{Details.map(detail => (
detail.shops.map(shop=> (
<li>{shop}</li>
))
))}
</ul>
)}


Json is like this:



[
{
"id": 1,
"shops": ["one", "two"]
}
]









share|improve this question














What is the best way to map over array inside an array when we are importing a local file. I get an error : "Cannot read property 'map' of undefined".



Shop.js



import Details from './details.json'


render(){
return (
<ul>
{Details.map(detail => (
detail.shops.map(shop=> (
<li>{shop}</li>
))
))}
</ul>
)}


Json is like this:



[
{
"id": 1,
"shops": ["one", "two"]
}
]






reactjs






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Nov 23 '18 at 19:05









DekeDeke

1,47611226




1,47611226








  • 2





    I believe you can't import JSON with the vanilla import/export syntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a .js file and then import it (see this question's answer: stackoverflow.com/questions/34944099/…)

    – Jayce444
    Nov 23 '18 at 19:25








  • 1





    It works as in codesandbox.io/s/13p1k8x2zq. But as Jayce444 said you have to use an appropriate loader for webpack(if you are using webpack), This sandbox is create-react-app based and built in config does that for in sandbox.

    – XPD
    Nov 23 '18 at 19:27













  • xpd: SyntaxError /src/index.js: Unexpected token, expected "}" (18:10) 16 | <li>{shop}</li> 17 | )) > 18 | )); | ^

    – Deke
    Nov 23 '18 at 19:31













  • Is it the warning?

    – XPD
    Nov 23 '18 at 19:33






  • 1





    Sorry check now

    – XPD
    Nov 23 '18 at 19:36














  • 2





    I believe you can't import JSON with the vanilla import/export syntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a .js file and then import it (see this question's answer: stackoverflow.com/questions/34944099/…)

    – Jayce444
    Nov 23 '18 at 19:25








  • 1





    It works as in codesandbox.io/s/13p1k8x2zq. But as Jayce444 said you have to use an appropriate loader for webpack(if you are using webpack), This sandbox is create-react-app based and built in config does that for in sandbox.

    – XPD
    Nov 23 '18 at 19:27













  • xpd: SyntaxError /src/index.js: Unexpected token, expected "}" (18:10) 16 | <li>{shop}</li> 17 | )) > 18 | )); | ^

    – Deke
    Nov 23 '18 at 19:31













  • Is it the warning?

    – XPD
    Nov 23 '18 at 19:33






  • 1





    Sorry check now

    – XPD
    Nov 23 '18 at 19:36








2




2





I believe you can't import JSON with the vanilla import/export syntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a .js file and then import it (see this question's answer: stackoverflow.com/questions/34944099/…)

– Jayce444
Nov 23 '18 at 19:25







I believe you can't import JSON with the vanilla import/export syntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a .js file and then import it (see this question's answer: stackoverflow.com/questions/34944099/…)

– Jayce444
Nov 23 '18 at 19:25






1




1





It works as in codesandbox.io/s/13p1k8x2zq. But as Jayce444 said you have to use an appropriate loader for webpack(if you are using webpack), This sandbox is create-react-app based and built in config does that for in sandbox.

– XPD
Nov 23 '18 at 19:27







It works as in codesandbox.io/s/13p1k8x2zq. But as Jayce444 said you have to use an appropriate loader for webpack(if you are using webpack), This sandbox is create-react-app based and built in config does that for in sandbox.

– XPD
Nov 23 '18 at 19:27















xpd: SyntaxError /src/index.js: Unexpected token, expected "}" (18:10) 16 | <li>{shop}</li> 17 | )) > 18 | )); | ^

– Deke
Nov 23 '18 at 19:31







xpd: SyntaxError /src/index.js: Unexpected token, expected "}" (18:10) 16 | <li>{shop}</li> 17 | )) > 18 | )); | ^

– Deke
Nov 23 '18 at 19:31















Is it the warning?

– XPD
Nov 23 '18 at 19:33





Is it the warning?

– XPD
Nov 23 '18 at 19:33




1




1





Sorry check now

– XPD
Nov 23 '18 at 19:36





Sorry check now

– XPD
Nov 23 '18 at 19:36












0






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