react store refrence to JSX element code example
Example 1: react.createref()
class CustomTextInput extends React.Component {
constructor(props) {
super(props);
// create a ref to store the textInput DOM element
this.textInput = React.createRef(); this.focusTextInput = this.focusTextInput.bind(this);
}
focusTextInput() {
// Explicitly focus the text input using the raw DOM API
// Note: we're accessing "current" to get the DOM node
this.textInput.current.focus(); }
render() {
// tell React that we want to associate the <input> ref
// with the `textInput` that we created in the constructor
return (
<div>
<input
type="text"
ref={this.textInput} /> <input
type="button"
value="Focus the text input"
onClick={this.focusTextInput}
/>
</div>
);
}
}
Example 2: refs react js
class Lesson9Refs extends Component {
onAddProduct = () => {
alert(this.refs.productname.value);
}
return (
<div>
<div className="container">
<div class="card mt-10">
<div class="card-header">
Featured
</div>
<div class="card-body">
<label> Product Name: </label>
<input type='text' className="form-control" ref="productname" />
<button type="submit" className="btn btn-primary" onClick={ this.onAddProduct } >
Add Product
</button>
</div>
</div>
<div className="row mt-10">
{ elements }
</div>
</div>
</div>
);
}
}
export default Lesson9Refs;