reactjs - 如何将搜索与我的反应组件中的列表连接起来?
问题描述
这是我在浏览器中搜索的样子:
这是它在React Component中的样子:
解决方案
您可以将 filterText: '', 置于状态。并使用此文本过滤项目。
class ProductCategoryRow extends React.Component {
render() {
const category = this.props.category;
return (
<tr>
<th colSpan="2">
{category}
</th>
</tr>
);
}
}
class ProductRow extends React.Component {
render() {
const product = this.props.product;
const name = product.stocked ?
product.name :
<span style={{color: 'red'}}>
{product.name}
</span>;
return (
<tr>
<td>{name}</td>
<td>{product.price}</td>
</tr>
);
}
}
class ProductTable extends React.Component {
render() {
const filterText = this.props.filterText;
const inStockOnly = this.props.inStockOnly;
const rows = [];
let lastCategory = null;
this.props.products.forEach((product) => {
if (product.name.indexOf(filterText) === -1) {
return;
}
if (inStockOnly && !product.stocked) {
return;
}
if (product.category !== lastCategory) {
rows.push(
<ProductCategoryRow
category={product.category}
key={product.category} />
);
}
rows.push(
<ProductRow
product={product}
key={product.name}
/>
);
lastCategory = product.category;
});
return (
<table>
<thead>
<tr>
<th>Name</th>
<th>Price</th>
</tr>
</thead>
<tbody>{rows}</tbody>
</table>
);
}
}
class SearchBar extends React.Component {
constructor(props) {
super(props);
this.handleFilterTextChange = this.handleFilterTextChange.bind(this);
this.handleInStockChange = this.handleInStockChange.bind(this);
}
handleFilterTextChange(e) {
this.props.onFilterTextChange(e.target.value);
}
handleInStockChange(e) {
this.props.onInStockChange(e.target.checked);
}
render() {
return (
<form>
<input
type="text"
placeholder="Search..."
value={this.props.filterText}
onChange={this.handleFilterTextChange}
/>
<p>
<input
type="checkbox"
checked={this.props.inStockOnly}
onChange={this.handleInStockChange}
/>
{' '}
Only show products in stock
</p>
</form>
);
}
}
class FilterableProductTable extends React.Component {
constructor(props) {
super(props);
this.state = {
filterText: '',
inStockOnly: false
};
this.handleFilterTextChange = this.handleFilterTextChange.bind(this);
this.handleInStockChange = this.handleInStockChange.bind(this);
}
handleFilterTextChange(filterText) {
this.setState({
filterText: filterText
});
}
handleInStockChange(inStockOnly) {
this.setState({
inStockOnly: inStockOnly
})
}
render() {
return (
<div>
<SearchBar
filterText={this.state.filterText}
inStockOnly={this.state.inStockOnly}
onFilterTextChange={this.handleFilterTextChange}
onInStockChange={this.handleInStockChange}
/>
<ProductTable
products={this.props.products}
filterText={this.state.filterText}
inStockOnly={this.state.inStockOnly}
/>
</div>
);
}
}
const PRODUCTS = [
{category: 'Sporting Goods', price: '$49.99', stocked: true, name: 'Football'},
{category: 'Sporting Goods', price: '$9.99', stocked: true, name: 'Baseball'},
{category: 'Sporting Goods', price: '$29.99', stocked: false, name: 'Basketball'},
{category: 'Electronics', price: '$99.99', stocked: true, name: 'iPod Touch'},
{category: 'Electronics', price: '$399.99', stocked: false, name: 'iPhone 5'},
{category: 'Electronics', price: '$199.99', stocked: true, name: 'Nexus 7'}
];
ReactDOM.render(
<FilterableProductTable products={PRODUCTS} />,
document.getElementById('container')
);
body {
padding: 5px
}
<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">
<!-- This element's contents will be replaced with your component. -->
</div>
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