Why is my react function returning [object,object]
I have a function in my Numbers component that should return the state however it returns [object,object] I cant see what i've done wrong?
I've written a function in Numbers, that returns another function in my apps component!
import React, { Component } from 'react';
import Numbers from './Numbers'
import './App.css';
class App extends Component {
constructor(props){
super()
this.state={
calcValue:0
}
}
takeValue = (n) => {
alert(n)
}
render() {
return (
<div className="App">
<Numbers submit={(n) => this.takeValue(n)} numberValue={1}/>
</div>
);
}
}
export default App;
Number component:
import React, { Component } from 'react';
import propTypes from 'prop-types';
class Numbers extends Component {
constructor(props){
super();
this.state={
numberValue:6
}
}
submit = (n) => {
this.props.takeValue(this.state.numberValue)
}
render() {
return (
<div>
<button value={this.state.numberValue} onClick={this.props.submit}>
{this.props.numberValue}
</button>
</div>
)
}
}
// Completed.propTypes={
// test:propTypes.string.isRequired
export default Numbers
reactjs
edited Dec 31 '18 at 11:42
EatYaFood
537212
asked Dec 31 '18 at 9:50
LeeLee
195
add a comment |
I have a function in my Numbers component that should return the state however it returns [object,object] I cant see what i've done wrong?
I've written a function in Numbers, that returns another function in my apps component!
import React, { Component } from 'react';
import Numbers from './Numbers'
import './App.css';
class App extends Component {
constructor(props){
super()
this.state={
calcValue:0
}
}
takeValue = (n) => {
alert(n)
}
render() {
return (
<div className="App">
<Numbers submit={(n) => this.takeValue(n)} numberValue={1}/>
</div>
);
}
}
export default App;
Number component:
import React, { Component } from 'react';
import propTypes from 'prop-types';
class Numbers extends Component {
constructor(props){
super();
this.state={
numberValue:6
}
}
submit = (n) => {
this.props.takeValue(this.state.numberValue)
}
render() {
return (
<div>
<button value={this.state.numberValue} onClick={this.props.submit}>
{this.props.numberValue}
</button>
</div>
)
}
}
// Completed.propTypes={
// test:propTypes.string.isRequired
export default Numbers
reactjs
edited Dec 31 '18 at 11:42
EatYaFood
537212
asked Dec 31 '18 at 9:50
LeeLee
195
add a comment |
I have a function in my Numbers component that should return the state however it returns [object,object] I cant see what i've done wrong?
I've written a function in Numbers, that returns another function in my apps component!
import React, { Component } from 'react';
import Numbers from './Numbers'
import './App.css';
class App extends Component {
constructor(props){
super()
this.state={
calcValue:0
}
}
takeValue = (n) => {
alert(n)
}
render() {
return (
<div className="App">
<Numbers submit={(n) => this.takeValue(n)} numberValue={1}/>
</div>
);
}
}
export default App;
Number component:
import React, { Component } from 'react';
import propTypes from 'prop-types';
class Numbers extends Component {
constructor(props){
super();
this.state={
numberValue:6
}
}
submit = (n) => {
this.props.takeValue(this.state.numberValue)
}
render() {
return (
<div>
<button value={this.state.numberValue} onClick={this.props.submit}>
{this.props.numberValue}
</button>
</div>
)
}
}
// Completed.propTypes={
// test:propTypes.string.isRequired
export default Numbers
reactjs
edited Dec 31 '18 at 11:42
EatYaFood
537212
asked Dec 31 '18 at 9:50
LeeLee
195
I have a function in my Numbers component that should return the state however it returns [object,object] I cant see what i've done wrong?
I've written a function in Numbers, that returns another function in my apps component!
import React, { Component } from 'react';
import Numbers from './Numbers'
import './App.css';
class App extends Component {
constructor(props){
super()
this.state={
calcValue:0
}
}
takeValue = (n) => {
alert(n)
}
render() {
return (
<div className="App">
<Numbers submit={(n) => this.takeValue(n)} numberValue={1}/>
</div>
);
}
}
export default App;
Number component:
import React, { Component } from 'react';
import propTypes from 'prop-types';
class Numbers extends Component {
constructor(props){
super();
this.state={
numberValue:6
}
}
submit = (n) => {
this.props.takeValue(this.state.numberValue)
}
render() {
return (
<div>
<button value={this.state.numberValue} onClick={this.props.submit}>
{this.props.numberValue}
</button>
</div>
)
}
}
// Completed.propTypes={
// test:propTypes.string.isRequired
export default Numbers
reactjs
reactjs
edited Dec 31 '18 at 11:42
EatYaFood
537212
asked Dec 31 '18 at 9:50
LeeLee
195
edited Dec 31 '18 at 11:42
EatYaFood
537212
asked Dec 31 '18 at 9:50
LeeLee
195
edited Dec 31 '18 at 11:42
EatYaFood
537212
edited Dec 31 '18 at 11:42
EatYaFood
537212
edited Dec 31 '18 at 11:42
EatYaFood
537212
537212
asked Dec 31 '18 at 9:50
LeeLee
195
asked Dec 31 '18 at 9:50
LeeLee
195
asked Dec 31 '18 at 9:50
LeeLee
195
195
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
You are not understanding concept of passing the props. you need to differentiate what you are passing into child component and how you want to call the parent from child.
Change
onClick={this.props.submit}
to
onClick={this.submit}
and
submit=(n) => {
this.props.takeValue(this.state.numberValue)
}
to
submit = (n) => {
this.props.submit(this.state.numberValue)
}
onClick={this.props.submit} will call parent component not the child one
Demo
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
1
Thanks Yes I have seen my mistakes. I am new to React.
– Lee
Dec 31 '18 at 10:04
@Lee yes it happens :)
– Just code
Dec 31 '18 at 10:04
add a comment |
Thanks I have found my error! Should be this.submit not this.props.submit
Also I needed to call the takeValue function
Thanks
edited Dec 31 '18 at 13:15
Tony Bui
41412
answered Dec 31 '18 at 10:03
LeeLee
195
yep. I think this is what you're looking for: stackblitz.com/edit/react-dobewq
– Liren Yeo
Dec 31 '18 at 10:07
This section is reserved for answers, you can thank @Just code by accepting his answer
– Treycos
Dec 31 '18 at 12:42
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
You are not understanding concept of passing the props. you need to differentiate what you are passing into child component and how you want to call the parent from child.
Change
onClick={this.props.submit}
to
onClick={this.submit}
and
submit=(n) => {
this.props.takeValue(this.state.numberValue)
}
to
submit = (n) => {
this.props.submit(this.state.numberValue)
}
onClick={this.props.submit} will call parent component not the child one
Demo
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
1
Thanks Yes I have seen my mistakes. I am new to React.
– Lee
Dec 31 '18 at 10:04
@Lee yes it happens :)
– Just code
Dec 31 '18 at 10:04
add a comment |
You are not understanding concept of passing the props. you need to differentiate what you are passing into child component and how you want to call the parent from child.
Change
onClick={this.props.submit}
to
onClick={this.submit}
and
submit=(n) => {
this.props.takeValue(this.state.numberValue)
}
to
submit = (n) => {
this.props.submit(this.state.numberValue)
}
onClick={this.props.submit} will call parent component not the child one
Demo
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
1
Thanks Yes I have seen my mistakes. I am new to React.
– Lee
Dec 31 '18 at 10:04
@Lee yes it happens :)
– Just code
Dec 31 '18 at 10:04
add a comment |
You are not understanding concept of passing the props. you need to differentiate what you are passing into child component and how you want to call the parent from child.
Change
onClick={this.props.submit}
to
onClick={this.submit}
and
submit=(n) => {
this.props.takeValue(this.state.numberValue)
}
to
submit = (n) => {
this.props.submit(this.state.numberValue)
}
onClick={this.props.submit} will call parent component not the child one
Demo
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
You are not understanding concept of passing the props. you need to differentiate what you are passing into child component and how you want to call the parent from child.
Change
onClick={this.props.submit}
to
onClick={this.submit}
and
submit=(n) => {
this.props.takeValue(this.state.numberValue)
}
to
submit = (n) => {
this.props.submit(this.state.numberValue)
}
onClick={this.props.submit} will call parent component not the child one
Demo
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
answered Dec 31 '18 at 10:02
Just codeJust code
10.4k53066
10.4k53066
1
Thanks Yes I have seen my mistakes. I am new to React.
– Lee
Dec 31 '18 at 10:04
@Lee yes it happens :)
– Just code
Dec 31 '18 at 10:04
add a comment |
1
Thanks Yes I have seen my mistakes. I am new to React.
– Lee
Dec 31 '18 at 10:04
@Lee yes it happens :)
– Just code
Dec 31 '18 at 10:04
1
1
Thanks Yes I have seen my mistakes. I am new to React.
– Lee
Dec 31 '18 at 10:04
Thanks Yes I have seen my mistakes. I am new to React.
– Lee
Dec 31 '18 at 10:04
@Lee yes it happens :)
– Just code
Dec 31 '18 at 10:04
@Lee yes it happens :)
– Just code
Dec 31 '18 at 10:04
add a comment |
Thanks I have found my error! Should be this.submit not this.props.submit
Also I needed to call the takeValue function
Thanks
edited Dec 31 '18 at 13:15
Tony Bui
41412
answered Dec 31 '18 at 10:03
LeeLee
195
yep. I think this is what you're looking for: stackblitz.com/edit/react-dobewq
– Liren Yeo
Dec 31 '18 at 10:07
This section is reserved for answers, you can thank @Just code by accepting his answer
– Treycos
Dec 31 '18 at 12:42
add a comment |
Thanks I have found my error! Should be this.submit not this.props.submit
Also I needed to call the takeValue function
Thanks
edited Dec 31 '18 at 13:15
Tony Bui
41412
answered Dec 31 '18 at 10:03
LeeLee
195
yep. I think this is what you're looking for: stackblitz.com/edit/react-dobewq
– Liren Yeo
Dec 31 '18 at 10:07
This section is reserved for answers, you can thank @Just code by accepting his answer
– Treycos
Dec 31 '18 at 12:42
add a comment |
Thanks I have found my error! Should be this.submit not this.props.submit
Also I needed to call the takeValue function
Thanks
edited Dec 31 '18 at 13:15
Tony Bui
41412
answered Dec 31 '18 at 10:03
LeeLee
195
Thanks I have found my error! Should be this.submit not this.props.submit
Also I needed to call the takeValue function
Thanks
edited Dec 31 '18 at 13:15
Tony Bui
41412
answered Dec 31 '18 at 10:03
LeeLee
195
edited Dec 31 '18 at 13:15
Tony Bui
41412
edited Dec 31 '18 at 13:15
Tony Bui
41412
edited Dec 31 '18 at 13:15
Tony Bui
41412
41412
answered Dec 31 '18 at 10:03
LeeLee
195
answered Dec 31 '18 at 10:03
LeeLee
195
answered Dec 31 '18 at 10:03
LeeLee
195
195
yep. I think this is what you're looking for: stackblitz.com/edit/react-dobewq
– Liren Yeo
Dec 31 '18 at 10:07
This section is reserved for answers, you can thank @Just code by accepting his answer
– Treycos
Dec 31 '18 at 12:42
add a comment |
yep. I think this is what you're looking for: stackblitz.com/edit/react-dobewq
– Liren Yeo
Dec 31 '18 at 10:07
This section is reserved for answers, you can thank @Just code by accepting his answer
– Treycos
Dec 31 '18 at 12:42
yep. I think this is what you're looking for: stackblitz.com/edit/react-dobewq
– Liren Yeo
Dec 31 '18 at 10:07
yep. I think this is what you're looking for: stackblitz.com/edit/react-dobewq
– Liren Yeo
Dec 31 '18 at 10:07
This section is reserved for answers, you can thank @Just code by accepting his answer
– Treycos
Dec 31 '18 at 12:42
This section is reserved for answers, you can thank @Just code by accepting his answer
– Treycos
Dec 31 '18 at 12:42
add a comment |
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