https://facebook.github.io/react/docs/thinking-in-react.html
Created
April 22, 2018 16:58
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react filter by category
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<div id="root"></div> | |
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// COMPONENTS | |
// ---------- | |
// Main | |
// UI | |
// ButtonCategory | |
// ProductItems | |
// ProductItem | |
// Components in reverse order of above | |
const ProductItem = ({ category, name }) => ( | |
<div className="category__list-item box flex-spread"> | |
{name} | |
<div className={`category--${category} circle`} /> | |
</div> | |
); | |
const ProductItems = ({ state: { products, displayCategory } }) => ( | |
<div> | |
{products | |
.filter( | |
({ category }) => | |
displayCategory === category || displayCategory === "all" | |
) | |
.map(({ category, name }) => ( | |
<ProductItem key={`ProductItems-name`} category={category} name={name} /> | |
))} | |
</div> | |
); | |
const ButtonCategory = ({ setCategory, category }) => ( | |
<button className={`btn-${category}`} onClick={() => setCategory(category)}> | |
{category} | |
</button> | |
); | |
const ButtonCategories = (productCategories, setCategory ) => ( | |
productCategories.map((category,i) => ( | |
<ButtonCategory key={category} setCategory={setCategory} category={category} /> | |
)) | |
); | |
const UI = ({ | |
state, | |
state: { productCategories }, | |
setCategory, | |
allProducts | |
}) => ( | |
<div className="box flex-row"> | |
<div className="box flex-col"> | |
<h3>Filter by Category</h3> | |
{ButtonCategories(productCategories, setCategory )} | |
</div> | |
<div className="box flex-col"> | |
<h3>Results</h3> | |
<ProductItems state={state} /> | |
</div> | |
</div> | |
); | |
class Main extends React.Component { | |
constructor(props) { | |
super(props); | |
this.state = { | |
displayCategory: "all", | |
products: PRODUCTS, | |
productCategories: PRODUCT_CATEGORIES | |
}; | |
this.setCategory = this.setCategory.bind(this); | |
} | |
setCategory(category) { | |
this.setState({ | |
displayCategory: category | |
}); | |
} | |
render() { | |
return <UI setCategory={this.setCategory} state={this.state} />; | |
} | |
} | |
// data | |
const PRODUCTS = [ | |
{ category: "entertainment", name: "Football" }, | |
{ category: "entertainment", name: "Baseball" }, | |
{ category: "entertainment", name: "Basketball" }, | |
{ category: "fashion", name: "iPod Touch" }, | |
{ category: "design", name: "iPhone 5" }, | |
{ category: "design", name: "Nexus 7" }, | |
{ category: "leisure", name: "Holiday" } | |
]; | |
// get unique category items | |
const uniqueItems = (x, i, a) => a.indexOf(x) === i; | |
const PRODUCT_CATEGORIES = PRODUCTS.map(prod => prod.category).filter( | |
uniqueItems | |
); | |
PRODUCT_CATEGORIES.push("all"); | |
PRODUCT_CATEGORIES.sort(); | |
ReactDOM.render(<Main products={PRODUCTS} />, document.getElementById("root")); |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.2.0/umd/react.development.js"></script> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.2.0/umd/react-dom.development.js"></script> |
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* { | |
box-sizing: border-box; | |
} | |
.box, | |
button { | |
font-family: 'Open Sans', sans-serif; | |
border: 1px solid grey; | |
border-radius: 3px; | |
padding: .5rem; | |
margin: .15rem; | |
/* float: left; */ | |
background-color: rgba(0, 20, 50, 0.05); | |
font-size: 1rem; | |
} | |
.category--fashion, | |
.btn-fashion { | |
background-color: orange; | |
} | |
.category--design, | |
.btn-design { | |
background-color: green; | |
color: white; | |
} | |
.category--leisure, | |
.btn-leisure { | |
background-color: purple; | |
color: white; | |
} | |
.category--entertainment, | |
.btn-entertainment { | |
background-color: pink; | |
} | |
.btn-all { | |
background-color: white; | |
} | |
.category__list-item { | |
background-color: white; | |
} | |
.flex-row { | |
display: flex; | |
flex-direction: row; | |
justify-content: center; | |
} | |
.flex-col { | |
display: flex; | |
flex-direction: column; | |
/* align-items: flex-start; */ | |
/* justify-content: center; */ | |
} | |
.flex-spread { | |
display: flex; | |
justify-content: space-between; | |
align-items: center; | |
} | |
.circle{ | |
border:1px solid grey; | |
width: 0.8rem; | |
height: 0.8rem; | |
border-radius: 50%; | |
margin:0 0 0 1rem; | |
} |
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