Accessing React component params in event handler
I'm not sure if I'm going about this the best way, but I am trying to access a React component's param in an onMouseOver event handler.
Event handler:
handleTabHover = event => {
this.setState({ indicatorColor: event });
};
React component:
<LinkTab
label="Dashboard"
to="/"
indicatorColor="gray"
onMouseOver={this.handleTabHover}
onFocus={this.handleTabHover}
/>
Basically, I'm expecting that event in the handleTabHover function to be the LinkTab component and then I can access it's "indicatorColor" param to set the class indicatorColor state, but that's not the case. I'm new to React and ES6 syntax so I'm sure I'm missing something fundamental to how event handler parameters work.
javascript reactjs
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
add a comment |
I'm not sure if I'm going about this the best way, but I am trying to access a React component's param in an onMouseOver event handler.
Event handler:
handleTabHover = event => {
this.setState({ indicatorColor: event });
};
React component:
<LinkTab
label="Dashboard"
to="/"
indicatorColor="gray"
onMouseOver={this.handleTabHover}
onFocus={this.handleTabHover}
/>
Basically, I'm expecting that event in the handleTabHover function to be the LinkTab component and then I can access it's "indicatorColor" param to set the class indicatorColor state, but that's not the case. I'm new to React and ES6 syntax so I'm sure I'm missing something fundamental to how event handler parameters work.
javascript reactjs
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
you can use event.target.style to get access to all styling attributes
– AlbertS
Nov 23 '18 at 18:00
add a comment |
I'm not sure if I'm going about this the best way, but I am trying to access a React component's param in an onMouseOver event handler.
Event handler:
handleTabHover = event => {
this.setState({ indicatorColor: event });
};
React component:
<LinkTab
label="Dashboard"
to="/"
indicatorColor="gray"
onMouseOver={this.handleTabHover}
onFocus={this.handleTabHover}
/>
Basically, I'm expecting that event in the handleTabHover function to be the LinkTab component and then I can access it's "indicatorColor" param to set the class indicatorColor state, but that's not the case. I'm new to React and ES6 syntax so I'm sure I'm missing something fundamental to how event handler parameters work.
javascript reactjs
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
I'm not sure if I'm going about this the best way, but I am trying to access a React component's param in an onMouseOver event handler.
Event handler:
handleTabHover = event => {
this.setState({ indicatorColor: event });
};
React component:
<LinkTab
label="Dashboard"
to="/"
indicatorColor="gray"
onMouseOver={this.handleTabHover}
onFocus={this.handleTabHover}
/>
Basically, I'm expecting that event in the handleTabHover function to be the LinkTab component and then I can access it's "indicatorColor" param to set the class indicatorColor state, but that's not the case. I'm new to React and ES6 syntax so I'm sure I'm missing something fundamental to how event handler parameters work.
javascript reactjs
javascript reactjs
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
edited Nov 23 '18 at 18:14
Adrita Sharma
86921129
86921129
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
asked Nov 23 '18 at 17:42
gamecockcowboysfangamecockcowboysfan
313
313
you can use event.target.style to get access to all styling attributes
– AlbertS
Nov 23 '18 at 18:00
add a comment |
you can use event.target.style to get access to all styling attributes
– AlbertS
Nov 23 '18 at 18:00
you can use event.target.style to get access to all styling attributes
– AlbertS
Nov 23 '18 at 18:00
you can use event.target.style to get access to all styling attributes
– AlbertS
Nov 23 '18 at 18:00
add a comment |
1 Answer
1
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oldest
votes
Basically, I'm expecting that "event" in the handleTabHover function to be the "LinkTab" component and then I can access it's "indicatorColor" param to set the class "indicatorColor" state, but that's not the case.
Yes, You can't do that.
The correct way would be
<LinkTab
label="Dashboard"
to="/"
indicatorColor={Colors.Deloitte.Primary.coolGray2}
onMouseOver={() => this.handleTabHover(Colors.Deloitte.Primary.coolGray2)}
onFocus={this.handleTabHover}
/>
and in your handler will be
handleTabHover = indicatorColor => {
this.setState({ indicatorColor });
};
You can read more here. https://reactjs.org/docs/faq-functions.html#how-do-i-pass-a-parameter-to-an-event-handler-or-callback
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
Ah, thank you! Just out of curiosity, is there an alternative way to do this that doesn't involve an arrow function/binding in Render? I don't think I'll have any performance issues, but it'd be nice to know of other possibilities.
– gamecockcowboysfan
Nov 23 '18 at 18:13
The performance cost isn't that big, so you can skip worrying about that part. ;) twitter.com/mjackson/status/1006600058228207616 Maybe another way can be using the customdata-*attribute if you want. reactjs.org/docs/… But not sure if it aligns with what you want to achieve.
– Hardik Modha
Nov 23 '18 at 18:19
add a comment |
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Basically, I'm expecting that "event" in the handleTabHover function to be the "LinkTab" component and then I can access it's "indicatorColor" param to set the class "indicatorColor" state, but that's not the case.
Yes, You can't do that.
The correct way would be
<LinkTab
label="Dashboard"
to="/"
indicatorColor={Colors.Deloitte.Primary.coolGray2}
onMouseOver={() => this.handleTabHover(Colors.Deloitte.Primary.coolGray2)}
onFocus={this.handleTabHover}
/>
and in your handler will be
handleTabHover = indicatorColor => {
this.setState({ indicatorColor });
};
You can read more here. https://reactjs.org/docs/faq-functions.html#how-do-i-pass-a-parameter-to-an-event-handler-or-callback
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
Ah, thank you! Just out of curiosity, is there an alternative way to do this that doesn't involve an arrow function/binding in Render? I don't think I'll have any performance issues, but it'd be nice to know of other possibilities.
– gamecockcowboysfan
Nov 23 '18 at 18:13
The performance cost isn't that big, so you can skip worrying about that part. ;) twitter.com/mjackson/status/1006600058228207616 Maybe another way can be using the customdata-*attribute if you want. reactjs.org/docs/… But not sure if it aligns with what you want to achieve.
– Hardik Modha
Nov 23 '18 at 18:19
add a comment |
Basically, I'm expecting that "event" in the handleTabHover function to be the "LinkTab" component and then I can access it's "indicatorColor" param to set the class "indicatorColor" state, but that's not the case.
Yes, You can't do that.
The correct way would be
<LinkTab
label="Dashboard"
to="/"
indicatorColor={Colors.Deloitte.Primary.coolGray2}
onMouseOver={() => this.handleTabHover(Colors.Deloitte.Primary.coolGray2)}
onFocus={this.handleTabHover}
/>
and in your handler will be
handleTabHover = indicatorColor => {
this.setState({ indicatorColor });
};
You can read more here. https://reactjs.org/docs/faq-functions.html#how-do-i-pass-a-parameter-to-an-event-handler-or-callback
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
Ah, thank you! Just out of curiosity, is there an alternative way to do this that doesn't involve an arrow function/binding in Render? I don't think I'll have any performance issues, but it'd be nice to know of other possibilities.
– gamecockcowboysfan
Nov 23 '18 at 18:13
The performance cost isn't that big, so you can skip worrying about that part. ;) twitter.com/mjackson/status/1006600058228207616 Maybe another way can be using the customdata-*attribute if you want. reactjs.org/docs/… But not sure if it aligns with what you want to achieve.
– Hardik Modha
Nov 23 '18 at 18:19
add a comment |
Basically, I'm expecting that "event" in the handleTabHover function to be the "LinkTab" component and then I can access it's "indicatorColor" param to set the class "indicatorColor" state, but that's not the case.
Yes, You can't do that.
The correct way would be
<LinkTab
label="Dashboard"
to="/"
indicatorColor={Colors.Deloitte.Primary.coolGray2}
onMouseOver={() => this.handleTabHover(Colors.Deloitte.Primary.coolGray2)}
onFocus={this.handleTabHover}
/>
and in your handler will be
handleTabHover = indicatorColor => {
this.setState({ indicatorColor });
};
You can read more here. https://reactjs.org/docs/faq-functions.html#how-do-i-pass-a-parameter-to-an-event-handler-or-callback
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
Basically, I'm expecting that "event" in the handleTabHover function to be the "LinkTab" component and then I can access it's "indicatorColor" param to set the class "indicatorColor" state, but that's not the case.
Yes, You can't do that.
The correct way would be
<LinkTab
label="Dashboard"
to="/"
indicatorColor={Colors.Deloitte.Primary.coolGray2}
onMouseOver={() => this.handleTabHover(Colors.Deloitte.Primary.coolGray2)}
onFocus={this.handleTabHover}
/>
and in your handler will be
handleTabHover = indicatorColor => {
this.setState({ indicatorColor });
};
You can read more here. https://reactjs.org/docs/faq-functions.html#how-do-i-pass-a-parameter-to-an-event-handler-or-callback
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
answered Nov 23 '18 at 17:46
Hardik ModhaHardik Modha
4,33212029
4,33212029
Ah, thank you! Just out of curiosity, is there an alternative way to do this that doesn't involve an arrow function/binding in Render? I don't think I'll have any performance issues, but it'd be nice to know of other possibilities.
– gamecockcowboysfan
Nov 23 '18 at 18:13
The performance cost isn't that big, so you can skip worrying about that part. ;) twitter.com/mjackson/status/1006600058228207616 Maybe another way can be using the customdata-*attribute if you want. reactjs.org/docs/… But not sure if it aligns with what you want to achieve.
– Hardik Modha
Nov 23 '18 at 18:19
add a comment |
Ah, thank you! Just out of curiosity, is there an alternative way to do this that doesn't involve an arrow function/binding in Render? I don't think I'll have any performance issues, but it'd be nice to know of other possibilities.
– gamecockcowboysfan
Nov 23 '18 at 18:13
The performance cost isn't that big, so you can skip worrying about that part. ;) twitter.com/mjackson/status/1006600058228207616 Maybe another way can be using the customdata-*attribute if you want. reactjs.org/docs/… But not sure if it aligns with what you want to achieve.
– Hardik Modha
Nov 23 '18 at 18:19
Ah, thank you! Just out of curiosity, is there an alternative way to do this that doesn't involve an arrow function/binding in Render? I don't think I'll have any performance issues, but it'd be nice to know of other possibilities.
– gamecockcowboysfan
Nov 23 '18 at 18:13
Ah, thank you! Just out of curiosity, is there an alternative way to do this that doesn't involve an arrow function/binding in Render? I don't think I'll have any performance issues, but it'd be nice to know of other possibilities.
– gamecockcowboysfan
Nov 23 '18 at 18:13
The performance cost isn't that big, so you can skip worrying about that part. ;) twitter.com/mjackson/status/1006600058228207616 Maybe another way can be using the custom
data-* attribute if you want. reactjs.org/docs/… But not sure if it aligns with what you want to achieve.– Hardik Modha
Nov 23 '18 at 18:19
The performance cost isn't that big, so you can skip worrying about that part. ;) twitter.com/mjackson/status/1006600058228207616 Maybe another way can be using the custom
data-* attribute if you want. reactjs.org/docs/… But not sure if it aligns with what you want to achieve.– Hardik Modha
Nov 23 '18 at 18:19
add a comment |
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you can use event.target.style to get access to all styling attributes
– AlbertS
Nov 23 '18 at 18:00