Mixing
React 16: TypeError: this.state.userInput.map is not a function
1
I have simple react app, which a user can enter a text input , I want to display character entered as list
here is what I have done so far:
app components
import React, { Component } from 'react';
import './App.css';
import Char from './Char/Char'
class App extends Component {
state ={
userInput: ''
}
handleChange =(e)=>{
this.setState({
userInput: e.target.value
})
render() {
const charList = this.state.userInput.map(char =>{
return (
<Char character={char} />
)
})
return (
<div className="container">
<div className="App card">
<input type="text" placeholder="enter a text"
value={this.state.userInput} onChange={this.handleChange}></input>
<p>Paragraph: {this.state.userInput}</p>
{charList}
</div>
</div>
);
}
}
export default App;
Here is Char component
import React from 'react'
const Char =(props) =>{
const divStyle = {
display: 'inline-block',
margin: '16px',
border: '1px solid pink',
padding: '16px',
textAlign: 'center',
backgroundColor: 'orange'
};
return (
<div style={divStyle}>
<p>{props.character}</p>
</div>
);
}
export default Char;
so when I run the app I get the following error
TypeError: this.state.userInput.map is not a function
What do I need to change to get rid of this distubing litle error?
javascript reactjs typescript react-redux
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
add a comment |
1
I have simple react app, which a user can enter a text input , I want to display character entered as list
here is what I have done so far:
app components
import React, { Component } from 'react';
import './App.css';
import Char from './Char/Char'
class App extends Component {
state ={
userInput: ''
}
handleChange =(e)=>{
this.setState({
userInput: e.target.value
})
render() {
const charList = this.state.userInput.map(char =>{
return (
<Char character={char} />
)
})
return (
<div className="container">
<div className="App card">
<input type="text" placeholder="enter a text"
value={this.state.userInput} onChange={this.handleChange}></input>
<p>Paragraph: {this.state.userInput}</p>
{charList}
</div>
</div>
);
}
}
export default App;
Here is Char component
import React from 'react'
const Char =(props) =>{
const divStyle = {
display: 'inline-block',
margin: '16px',
border: '1px solid pink',
padding: '16px',
textAlign: 'center',
backgroundColor: 'orange'
};
return (
<div style={divStyle}>
<p>{props.character}</p>
</div>
);
}
export default Char;
so when I run the app I get the following error
TypeError: this.state.userInput.map is not a function
What do I need to change to get rid of this distubing litle error?
javascript reactjs typescript react-redux
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
Evan I know that but I am trying to find a way to make this work , I am sure there is a way
– user9964622
Nov 21 '18 at 1:36
1
Try "this.state.userInput.split("").map(" instead
– Caleb H.
Nov 21 '18 at 1:37
If you knew that, why are you callingmapon a string? Surely the question is "how do I loop each character in a string" or something. How is react even relevant?
– Evan Trimboli
Nov 21 '18 at 1:37
add a comment |
1
1
1
I have simple react app, which a user can enter a text input , I want to display character entered as list
here is what I have done so far:
app components
import React, { Component } from 'react';
import './App.css';
import Char from './Char/Char'
class App extends Component {
state ={
userInput: ''
}
handleChange =(e)=>{
this.setState({
userInput: e.target.value
})
render() {
const charList = this.state.userInput.map(char =>{
return (
<Char character={char} />
)
})
return (
<div className="container">
<div className="App card">
<input type="text" placeholder="enter a text"
value={this.state.userInput} onChange={this.handleChange}></input>
<p>Paragraph: {this.state.userInput}</p>
{charList}
</div>
</div>
);
}
}
export default App;
Here is Char component
import React from 'react'
const Char =(props) =>{
const divStyle = {
display: 'inline-block',
margin: '16px',
border: '1px solid pink',
padding: '16px',
textAlign: 'center',
backgroundColor: 'orange'
};
return (
<div style={divStyle}>
<p>{props.character}</p>
</div>
);
}
export default Char;
so when I run the app I get the following error
TypeError: this.state.userInput.map is not a function
What do I need to change to get rid of this distubing litle error?
javascript reactjs typescript react-redux
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
I have simple react app, which a user can enter a text input , I want to display character entered as list
here is what I have done so far:
app components
import React, { Component } from 'react';
import './App.css';
import Char from './Char/Char'
class App extends Component {
state ={
userInput: ''
}
handleChange =(e)=>{
this.setState({
userInput: e.target.value
})
render() {
const charList = this.state.userInput.map(char =>{
return (
<Char character={char} />
)
})
return (
<div className="container">
<div className="App card">
<input type="text" placeholder="enter a text"
value={this.state.userInput} onChange={this.handleChange}></input>
<p>Paragraph: {this.state.userInput}</p>
{charList}
</div>
</div>
);
}
}
export default App;
Here is Char component
import React from 'react'
const Char =(props) =>{
const divStyle = {
display: 'inline-block',
margin: '16px',
border: '1px solid pink',
padding: '16px',
textAlign: 'center',
backgroundColor: 'orange'
};
return (
<div style={divStyle}>
<p>{props.character}</p>
</div>
);
}
export default Char;
so when I run the app I get the following error
TypeError: this.state.userInput.map is not a function
What do I need to change to get rid of this distubing litle error?
javascript reactjs typescript react-redux
javascript reactjs typescript react-redux
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
asked Nov 21 '18 at 1:30
user9964622user9964622
1,14311037
1,14311037
Evan I know that but I am trying to find a way to make this work , I am sure there is a way
– user9964622
Nov 21 '18 at 1:36
1
Try "this.state.userInput.split("").map(" instead
– Caleb H.
Nov 21 '18 at 1:37
If you knew that, why are you callingmapon a string? Surely the question is "how do I loop each character in a string" or something. How is react even relevant?
– Evan Trimboli
Nov 21 '18 at 1:37
add a comment |
Evan I know that but I am trying to find a way to make this work , I am sure there is a way
– user9964622
Nov 21 '18 at 1:36
1
Try "this.state.userInput.split("").map(" instead
– Caleb H.
Nov 21 '18 at 1:37
If you knew that, why are you callingmapon a string? Surely the question is "how do I loop each character in a string" or something. How is react even relevant?
– Evan Trimboli
Nov 21 '18 at 1:37
Evan I know that but I am trying to find a way to make this work , I am sure there is a way
– user9964622
Nov 21 '18 at 1:36
Evan I know that but I am trying to find a way to make this work , I am sure there is a way
– user9964622
Nov 21 '18 at 1:36
1
1
Try "this.state.userInput.split("").map(" instead
– Caleb H.
Nov 21 '18 at 1:37
Try "this.state.userInput.split("").map(" instead
– Caleb H.
Nov 21 '18 at 1:37
If you knew that, why are you calling
map on a string? Surely the question is "how do I loop each character in a string" or something. How is react even relevant?– Evan Trimboli
Nov 21 '18 at 1:37
If you knew that, why are you calling
map on a string? Surely the question is "how do I loop each character in a string" or something. How is react even relevant?– Evan Trimboli
Nov 21 '18 at 1:37
add a comment |
1 Answer
1
active
oldest
votes
3
There is no map method for a string.
You can make it an array easily enough:
this.state.userInput.split('').map(c => <Char character={c} />);
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
add a comment |
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1 Answer
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1 Answer
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3
There is no map method for a string.
You can make it an array easily enough:
this.state.userInput.split('').map(c => <Char character={c} />);
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
add a comment |
3
There is no map method for a string.
You can make it an array easily enough:
this.state.userInput.split('').map(c => <Char character={c} />);
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
add a comment |
3
3
3
There is no map method for a string.
You can make it an array easily enough:
this.state.userInput.split('').map(c => <Char character={c} />);
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
There is no map method for a string.
You can make it an array easily enough:
this.state.userInput.split('').map(c => <Char character={c} />);
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
answered Nov 21 '18 at 1:37
Evan TrimboliEvan Trimboli
26.4k43453
26.4k43453
add a comment |
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Evan I know that but I am trying to find a way to make this work , I am sure there is a way
– user9964622
Nov 21 '18 at 1:36
1
Try "this.state.userInput.split("").map(" instead
– Caleb H.
Nov 21 '18 at 1:37
If you knew that, why are you calling
mapon a string? Surely the question is "how do I loop each character in a string" or something. How is react even relevant?– Evan Trimboli
Nov 21 '18 at 1:37