我正在使用github搜索API进行webapp。我希望每个仓库的信息显示在特定的仓库下。 我希望在按下特定按钮时显示来自AJAX请求的内容。我正在使用React。由于我使用item.x来访问我需要获取该项目的信息,并且我假设我需要使用map,但是当这样做时它将显示所有结果而不仅仅是特定的存储库。无论如何,我可以得到物品,因为它目前说它未定义?
let searchTerm;
class SearchBox extends React.Component {
constructor(props) {
super(props);
this.onClick = this.onClick.bind(this);
this.state = { repositories: [],
showInfo: false };
}
render() {
let moreDetail;
if(this.state.showInfo){
moreDetail= <div className="info"> <li>
<p>Open issue count </p>:{item.open_issues_count}
</li>
<li>
<p>Number of forks </p>:{item.forks}
</li>
<li>
<p>Language </p>:{item.language}
</li></div>;
}
return(
<div>
<form>
<input type="text" className="searchbox" ref={(input) => { this.searchBox = input; }}/>
<button onClick={this.onClick}>Search</button>
</form>
<h2>Repositories</h2>
<ul>
{ this.state.repositories.map( ( item, index ) => (
<div key={ index }>
<a href={item.html_url}> <li >
{ item.name }
</li>
</a>
{moreDetail}
<button onClick={this._handleClick.bind(this)}>Detailed view</button>
</div>
)) }
</ul>
</div>
);
}
_handleClick(){
this.setState({
showInfo: !this.state.showInfo
});
}
onClick(event) {
searchTerm = this.searchBox.value;
let endpoint = 'https://api.github.com/search/repositories?sort=stars&order=desc&q=' + searchTerm;
console.log(searchTerm);
fetch(endpoint)
.then(blob => blob.json())
.then(response => {
this.setState({ repositories: response.items });
});
event.preventDefault();
}
}
答案 0 :(得分:1)
问题在于背景。定义moreDetail
变量时,您的上下文中没有item
(仅在您拥有该地图函数的情况下)。
一个选项是使用变量moreDetail
作为接收您要显示的项目的函数。
您的渲染方法应如下所示:
render() {
const moreDetail = (item) => ( !this.state.showInfo ? <span /> :
<div className="info">
<li>
<p>Open issue count </p>:{item.open_issues_count}
</li>
<li>
<p>Number of forks </p>:{item.forks}
</li>
<li>
<p>Language </p>:{item.language}
</li>
</div>
);
return (
<div>
<form>
<input type="text" className="searchbox" ref={(input) => { this.searchBox = input; }}/>
<button onClick={this.onClick}>Search</button>
</form>
<h2>Repositories</h2>
<ul>
{ this.state.repositories.map( ( item, index ) => (
<div key={ index }>
<a href={item.html_url}> <li >
{ item.name }
</li>
</a>
{moreDetail(item)}
<button onClick={this._handleClick.bind(this)}>Detailed view</button>
</div>
)) }
</ul>
</div>
);
}