“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"]
}
]
reactjs
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
|
show 3 more comments
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"]
}
]
reactjs
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
2
I believe you can't import JSON with the vanillaimport/exportsyntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a.jsfile 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
|
show 3 more comments
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"]
}
]
reactjs
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
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
reactjs
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
asked Nov 23 '18 at 19:05
DekeDeke
1,47611226
1,47611226
2
I believe you can't import JSON with the vanillaimport/exportsyntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a.jsfile 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
|
show 3 more comments
2
I believe you can't import JSON with the vanillaimport/exportsyntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a.jsfile 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
|
show 3 more comments
0
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2
I believe you can't import JSON with the vanilla
import/exportsyntax of ES6. You either have to use something like webpack+json-loader, or convert your JSON to a.jsfile 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