[英]How to sort data and display it in reactjs?
當用戶單擊按資金排序時,我想按排序方式顯示項目,然后按資金排序時顯示項目,但是我的代碼不起作用,為什么? 我正在導入sortBy()函數,並在用戶單擊按鈕時使用它。
home.js:
import React, { Component } from 'react';
import Card from '../common/card';
import Projects from '../../data/projects';
import { sortBy } from './helper';
export default class Home extends Component {
constructor(props) {
super(props);
this.state = {
projects: Projects
}
}
render() {
return (
<div>
<div className="header">
<div className="buttonContainer">
<div>
<button className="btn btn-primary mycustom dropdown-toggle mr-4" type="button" data-toggle="dropdown" aria-haspopup="true"
aria-expanded="false">Sort by </button>
<div className="dropdown-menu">
<a className="dropdown-item" href="#" onClick={() => sortBy('funded')}>Percentage fund</a>
<a className="dropdown-item" href="#" onClick={() => sortBy('backers')}>Number of backers</a>
</div>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row">
{this.state.projects.map( (val,index) => (
<div class="col-3">
<Card title={val.title} by={val.by} blurb={val.blurb}
url={val.url} funded={val.funded} backers={val.backers} imgurl={index}/>
</div>
))}
</div>
</div>
</div>
)
}
}
helper.js:
import projects from '../../data/projects';
export function sortBy (searchTerm) {
if(searchTerm === 'funded'){
return projects.sort((a,b) => a.funded - b.funded);
}else if(searchTerm === 'backers'){
return projects.sort((a,b) => a.backers - b.backers);
}
}
projects.js:
this.state.projects
而不是Projects
sortBy
函數可以簡化,它應該為您設置狀態,最好將其添加到組件中: --
sortBy(searchTerm) {
this.setState({ projects: [...Projects].sort((a, b) => a[searchTerm] - b[searchTerm]) });
}
然后用
onClick={() => this.sortBy('funded')}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.