React why is this simple array map function not returning anything?
I have a React component creating a bulleted list for items in an array (called activePath). The array is reporting correctly via console.log, and here is the format:
{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}
There are six of these in the array. I did an Array.isArray just to confirm that this is a true array and it is. I am trying to map this array and output a bulleted list with the following:
activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
Here is the entire component ...
export default class ServicesInfo extends React.Component {
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
The ServicesInfo is the child component. Here is the parent ...
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo />
</div>
)
}
A single bullet with no text is returning. I have been at this project for about 16 hours straight and think I am just missing something simple. Please help!
arrays reactjs
asked Nov 12 at 12:14
CHays412
526
|
show 3 more comments
I have a React component creating a bulleted list for items in an array (called activePath). The array is reporting correctly via console.log, and here is the format:
{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}
There are six of these in the array. I did an Array.isArray just to confirm that this is a true array and it is. I am trying to map this array and output a bulleted list with the following:
activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
Here is the entire component ...
export default class ServicesInfo extends React.Component {
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
The ServicesInfo is the child component. Here is the parent ...
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo />
</div>
)
}
A single bullet with no text is returning. I have been at this project for about 16 hours straight and think I am just missing something simple. Please help!
arrays reactjs
asked Nov 12 at 12:14
CHays412
526
this code you have written inside render function or inside a separate function component.
– Mohammed Ashfaq
Nov 12 at 12:17
1
Could you please include your entire component? The code currently in your question isn't enough to say what might be wrong.
– Tholle
Nov 12 at 12:19
I am running it in the render function with const runTable = activePath.map((item,i) => <li key={i}>{item.device_id}</li> ) and calling it in the return with {runTable}
– CHays412
Nov 12 at 12:21
That's not enough either, sadly. Please include a Minimal, Complete, and Verifiable example or it will be difficult for anyone to help you.
– Tholle
Nov 12 at 12:22
1
You have not passed anypropstoServicesInfoin you code snippet above. Thereforethis.props.activePathis alwaysundefinedinside yourServicesInfocomponent.
– dschu
Nov 12 at 12:52
|
show 3 more comments
I have a React component creating a bulleted list for items in an array (called activePath). The array is reporting correctly via console.log, and here is the format:
{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}
There are six of these in the array. I did an Array.isArray just to confirm that this is a true array and it is. I am trying to map this array and output a bulleted list with the following:
activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
Here is the entire component ...
export default class ServicesInfo extends React.Component {
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
The ServicesInfo is the child component. Here is the parent ...
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo />
</div>
)
}
A single bullet with no text is returning. I have been at this project for about 16 hours straight and think I am just missing something simple. Please help!
arrays reactjs
asked Nov 12 at 12:14
CHays412
526
I have a React component creating a bulleted list for items in an array (called activePath). The array is reporting correctly via console.log, and here is the format:
{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}
There are six of these in the array. I did an Array.isArray just to confirm that this is a true array and it is. I am trying to map this array and output a bulleted list with the following:
activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
Here is the entire component ...
export default class ServicesInfo extends React.Component {
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
The ServicesInfo is the child component. Here is the parent ...
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo />
</div>
)
}
A single bullet with no text is returning. I have been at this project for about 16 hours straight and think I am just missing something simple. Please help!
arrays reactjs
arrays reactjs
asked Nov 12 at 12:14
CHays412
526
asked Nov 12 at 12:14
CHays412
526
edited Nov 12 at 12:43
asked Nov 12 at 12:14
CHays412
526
asked Nov 12 at 12:14
CHays412
526
asked Nov 12 at 12:14
CHays412
526
526
this code you have written inside render function or inside a separate function component.
– Mohammed Ashfaq
Nov 12 at 12:17
1
Could you please include your entire component? The code currently in your question isn't enough to say what might be wrong.
– Tholle
Nov 12 at 12:19
I am running it in the render function with const runTable = activePath.map((item,i) => <li key={i}>{item.device_id}</li> ) and calling it in the return with {runTable}
– CHays412
Nov 12 at 12:21
That's not enough either, sadly. Please include a Minimal, Complete, and Verifiable example or it will be difficult for anyone to help you.
– Tholle
Nov 12 at 12:22
1
You have not passed anypropstoServicesInfoin you code snippet above. Thereforethis.props.activePathis alwaysundefinedinside yourServicesInfocomponent.
– dschu
Nov 12 at 12:52
|
show 3 more comments
this code you have written inside render function or inside a separate function component.
– Mohammed Ashfaq
Nov 12 at 12:17
1
Could you please include your entire component? The code currently in your question isn't enough to say what might be wrong.
– Tholle
Nov 12 at 12:19
I am running it in the render function with const runTable = activePath.map((item,i) => <li key={i}>{item.device_id}</li> ) and calling it in the return with {runTable}
– CHays412
Nov 12 at 12:21
That's not enough either, sadly. Please include a Minimal, Complete, and Verifiable example or it will be difficult for anyone to help you.
– Tholle
Nov 12 at 12:22
1
You have not passed anypropstoServicesInfoin you code snippet above. Thereforethis.props.activePathis alwaysundefinedinside yourServicesInfocomponent.
– dschu
Nov 12 at 12:52
this code you have written inside render function or inside a separate function component.
– Mohammed Ashfaq
Nov 12 at 12:17
this code you have written inside render function or inside a separate function component.
– Mohammed Ashfaq
Nov 12 at 12:17
1
1
Could you please include your entire component? The code currently in your question isn't enough to say what might be wrong.
– Tholle
Nov 12 at 12:19
Could you please include your entire component? The code currently in your question isn't enough to say what might be wrong.
– Tholle
Nov 12 at 12:19
I am running it in the render function with const runTable = activePath.map((item,i) => <li key={i}>{item.device_id}</li> ) and calling it in the return with {runTable}
– CHays412
Nov 12 at 12:21
I am running it in the render function with const runTable = activePath.map((item,i) => <li key={i}>{item.device_id}</li> ) and calling it in the return with {runTable}
– CHays412
Nov 12 at 12:21
That's not enough either, sadly. Please include a Minimal, Complete, and Verifiable example or it will be difficult for anyone to help you.
– Tholle
Nov 12 at 12:22
That's not enough either, sadly. Please include a Minimal, Complete, and Verifiable example or it will be difficult for anyone to help you.
– Tholle
Nov 12 at 12:22
1
1
You have not passed any
props to ServicesInfo in you code snippet above. Therefore this.props.activePath is always undefined inside your ServicesInfo component.– dschu
Nov 12 at 12:52
You have not passed any
props to ServicesInfo in you code snippet above. Therefore this.props.activePath is always undefined inside your ServicesInfo component.– dschu
Nov 12 at 12:52
|
show 3 more comments
2 Answers
2
active
oldest
votes
In the InfoHolder you haven't passed activePath as a prop to the ServicesInfo component. You have to pass the activePath like this: <ServicesInfo activePath={activePath} />
Codesandbox
answered Nov 12 at 12:49
im_tsm
711321
add a comment |
Pass your array in the component.
Also add constructor(props){ to get props from other components.
super(props) {}
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
this.state={
objectArray =[{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}]
}
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo activePath={this.state.object} />
</div>
)
}
export default class ServicesInfo extends React.Component {
constructor(props) {
super(props) {
}
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
answered Nov 13 at 10:48
Yahya Ahmed
1639
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
In the InfoHolder you haven't passed activePath as a prop to the ServicesInfo component. You have to pass the activePath like this: <ServicesInfo activePath={activePath} />
Codesandbox
answered Nov 12 at 12:49
im_tsm
711321
add a comment |
In the InfoHolder you haven't passed activePath as a prop to the ServicesInfo component. You have to pass the activePath like this: <ServicesInfo activePath={activePath} />
Codesandbox
answered Nov 12 at 12:49
im_tsm
711321
add a comment |
In the InfoHolder you haven't passed activePath as a prop to the ServicesInfo component. You have to pass the activePath like this: <ServicesInfo activePath={activePath} />
Codesandbox
answered Nov 12 at 12:49
im_tsm
711321
In the InfoHolder you haven't passed activePath as a prop to the ServicesInfo component. You have to pass the activePath like this: <ServicesInfo activePath={activePath} />
Codesandbox
answered Nov 12 at 12:49
im_tsm
711321
answered Nov 12 at 12:49
im_tsm
711321
answered Nov 12 at 12:49
im_tsm
711321
answered Nov 12 at 12:49
im_tsm
711321
711321
add a comment |
add a comment |
Pass your array in the component.
Also add constructor(props){ to get props from other components.
super(props) {}
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
this.state={
objectArray =[{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}]
}
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo activePath={this.state.object} />
</div>
)
}
export default class ServicesInfo extends React.Component {
constructor(props) {
super(props) {
}
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
answered Nov 13 at 10:48
Yahya Ahmed
1639
add a comment |
Pass your array in the component.
Also add constructor(props){ to get props from other components.
super(props) {}
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
this.state={
objectArray =[{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}]
}
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo activePath={this.state.object} />
</div>
)
}
export default class ServicesInfo extends React.Component {
constructor(props) {
super(props) {
}
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
answered Nov 13 at 10:48
Yahya Ahmed
1639
add a comment |
Pass your array in the component.
Also add constructor(props){ to get props from other components.
super(props) {}
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
this.state={
objectArray =[{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}]
}
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo activePath={this.state.object} />
</div>
)
}
export default class ServicesInfo extends React.Component {
constructor(props) {
super(props) {
}
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
answered Nov 13 at 10:48
Yahya Ahmed
1639
Pass your array in the component.
Also add constructor(props){ to get props from other components.
super(props) {}
export default class InfoHolder extends React.Component {
constructor(props) {
super(props) {
this.state={
objectArray =[{device_id: "nlab5320a", port_id: "XGigabitEthernet0/0/3"}]
}
}
render() {
return(
<div>
<p>Here is a listing of the nodes:</p>
<ServicesInfo activePath={this.state.object} />
</div>
)
}
export default class ServicesInfo extends React.Component {
constructor(props) {
super(props) {
}
render() {
const { activePath } = this.props;
const runTable = activePath.map((item, i) => (
<li key={i}>{item.device_id}</li>
));
return (
<div>
<ul>{runTable}</ul>
</div>
);
}
}
answered Nov 13 at 10:48
Yahya Ahmed
1639
answered Nov 13 at 10:48
Yahya Ahmed
1639
answered Nov 13 at 10:48
Yahya Ahmed
1639
answered Nov 13 at 10:48
Yahya Ahmed
1639
1639
add a comment |
add a comment |
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this code you have written inside render function or inside a separate function component.
– Mohammed Ashfaq
Nov 12 at 12:17
1
Could you please include your entire component? The code currently in your question isn't enough to say what might be wrong.
– Tholle
Nov 12 at 12:19
I am running it in the render function with const runTable = activePath.map((item,i) => <li key={i}>{item.device_id}</li> ) and calling it in the return with {runTable}
– CHays412
Nov 12 at 12:21
That's not enough either, sadly. Please include a Minimal, Complete, and Verifiable example or it will be difficult for anyone to help you.
– Tholle
Nov 12 at 12:22
1
You have not passed any
propstoServicesInfoin you code snippet above. Thereforethis.props.activePathis alwaysundefinedinside yourServicesInfocomponent.– dschu
Nov 12 at 12:52