How adding/removing input elements dynamically possible?
Yes, it is possible, you can add/remove input elements dynamically, But for that you need to take care of few things:
1- Proper binding of events.
2- Array to store the values of each input element separately.
3- When user fill value in any input element then updating only that specific value in state.
Logic:
Maintain an array inside state, that will store the values. Use #array.map to create ui (input element) for each array values. while creating the fields, use a remove button with each field, and pass the index of field in that function, it will help you to identify which field you wants to delete, do the same thing for onChange also.
Check this example:
class App extends React.Component {
constructor(props) {
super(props);
this.state = { values: [] };
this.handleSubmit = this.handleSubmit.bind(this);
}
createUI(){
return this.state.values.map((el, i) =>
<div key={i}>
<input type="text" value={el||''} onChange={this.handleChange.bind(this, i)} />
<input type="button" value="remove" onClick={this.removeClick.bind(this, i)}/>
</div>
)
}
handleChange(i, event) {
let values = [...this.state.values];
values[i] = event.target.value;
this.setState({ values });
}
addClick(){
this.setState(prevState => ({ values: [...prevState.values, '']}))
}
removeClick(i){
let values = [...this.state.values];
values.splice(i,1);
this.setState({ values });
}
handleSubmit(event) {
alert('A name was submitted: ' + this.state.values.join(', '));
event.preventDefault();
}
render() {
return (
<form onSubmit={this.handleSubmit}>
{this.createUI()}
<input type="button" value="add more" onClick={this.addClick.bind(this)}/>
<input type="submit" value="Submit" />
</form>
);
}
}
ReactDOM.render(<App />, document.getElementById('container'));<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id='container'/>Check the working jsfiddle: https://jsfiddle.net/mayankshukla5031/ezdxg224/