javascript - React.js 从 js 数组中获取数据

Question

我有以下代码:

import React from 'react';

import ProjectsData from './projects.js';

class SingleProject extends React.Component {
    render () {
        return (
            <div className="info-project-wrapper">
                <h2>{this.props.title}</h2>
                <span className="show-for-large">{this.props.by}</span>
                <ul className="project-links show-for-large">
                    <li>{this.props.links}</li>
                </ul>
                <div className="info-project">
                    <p>VIEW NOW</p>
                </div>
            </div>
        )
    }
}

class SingleProjectWrapper extends React.Component {
    render () {
        var projects = [];
        this.props.projects.forEach(function(project, i){
            projects.push(<SingleProject title={project.title}  
                             by={project.by}
                             links={projects.links}
                             key={i} />);
        });
        return (
            <div className="single-project project-4">
                {projects}
            </div>
        )
    }
}

class Projects extends React.Component {
  render () {
    return (
        <section>
            <SingleProjectWrapper projects={ProjectsData} />
        </section>
    );
  }
}

export default Projects;

和“projectsData”来自:

var projects = [
    {
        title: 'title1',
        by: 'dfs',
        links: ['link-1', 'link-2', 'link-3']
    },
    {
        title: 'title2',
        by: 'sdfsd',
        links: ['link-1', 'link-2', 'link-3']
    },
    {
        title: 'title3',
        by: 'sfsf',
        links: ['link-1', 'link-2', 'link-3']
    },
    {
        title: 'title4',
        by: 'sdffd',
        links: ['link-1', 'link-2', 'link-3']
    }
];

export default projects;

除 <li>{this.props.links}</li> 外，大部分数据都正确显示.我只得到一个空的 <li></li>而不是每个“link-1、link-2 和 link-3”。

Answer 1

您需要遍历链接数组，React 不会对数组做任何花哨的事情。

所以代替;

<ul className="project-links show-for-large">
  <li>{this.props.links}</li>
</ul>

你需要做的；

<ul className="project-links show-for-large">
    {this.props.links.map(i => <li>i</li>)}
</ul>