Can I autofocus on the first field in a reductive form created using a loop?
I created a React component using reducex form and watch autoFocus on the first field. Fields are created by scrolling through an object and creating a field for each item in that object. When I use autoFocus in JSX it autofocus on the last field in the form (which makes sense).
Does anyone know how I can autofocus on the first field in a form?
Here is my component:
import React, { Component } from 'react';
import { Field, reduxForm } from 'redux-form';
class BalanceForm extends Component {
constructor(props) {
super(props);
this.submitForm = this.submitForm.bind(this);
this.cancel = this.cancel.bind(this);
}
cancel() {
//not relevant
}
submitForm(e, values) {
//not relevant
}
render() {
return (
<div>
{this.props.balanceFormVisible &&
<div className="modal-background">
<div className="modal">
<form onSubmit={this.submitForm}>
{Object.keys(this.props.accounts).map((key) => {
return (
this.props.accounts[key].visible &&
<div key={this.props.accounts[key].name}>
<label className="form-label" htmlFor={this.props.accounts[key].name}>
{this.props.accounts[key].display}
</label>
<Field
name={this.props.accounts[key].name}
component="input"
type="number"
placeholder=""
autoFocus
/>
</div>
)
})}
<button type="submit">Submit</button>
<button onClick={ this.cancel } className="cancelbtn" >Cancel</button>
</form>
</div>
</div>
}
</div>
);
}
}
BalanceForm = reduxForm({form: 'balance'})(BalanceForm)
export default BalanceForm;
Thank you in advance:)
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The solution to this was to conditionally render the form field. Thanks to Alexander Borodin for inspiration ...
{Object.keys(this.props.accounts).map((key, i) => {
console.log(key, i)
return (
this.props.accounts[key].visible &&
<div key={this.props.accounts[key].name}>
<label className="form-label" htmlFor={this.props.accounts[key].name}>
{this.props.accounts[key].display}
</label>
{(i === 0) ? (
<Field
name={this.props.accounts[key].name}
component="input"
type="number"
placeholder=""
autoFocus
/>
) : (
<Field
name={this.props.accounts[key].name}
component="input"
type="number"
placeholder=""
/>
)}
</div>
)
})}
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Some of them either didn't compile or are a little verbose. This worked for me:
{Object.keys(item)
.map((key, i) =>
<div className={`form-row ${key}`} key={key}>
<label>{key}</label>
<input value={item[key]}
type='text'
onChange={e => {
this._updateValue(key, e.target.value);
}}
autoFocus={i === 0}
/>
</div>
)}
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Try the following:
{Object.keys(this.props.accounts).map((key, i) => {
return (
this.props.accounts[key].visible &&
<div key={this.props.accounts[key].name}>
<label className="form-label" htmlFor={this.props.accounts[key].name}>
{this.props.accounts[key].display}
</label>
<Field
name={this.props.accounts[key].name}
component="input"
type="number"
placeholder=""
{ (i === 0) ? 'autoFocus': ''}
/>
</div>
)
})}
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Alternatively, if you are connecting to ComponentDidMount, you can ask the DOM to focus on the first existing field on the form.
-
Add a link to the form
<form onSubmit={this.submitForm} ref='form'>
-
Use ref to focus the element after mounting
componentDidMount() { const firstInput = this.refs.form.querySelector('input')[0]; firstInput && firstInput.focus(); }
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