我试图从JSON中加载项目,并在点击时使用描述切换下拉div。虽然我可以在静态div上按顺序显示元素(例如:loc1 & desc1, loc2 & desc2
),但在第二部分(desc)隐藏时只能在点击loc loc时显示如何正确渲染它。ReactJS:如何按顺序映射JSON元素并在点击时显示隐藏的div
什么是映射结果的最佳方式,因此它不显示为loc1 & loc2, desc1 & desc2
而是loc1 & desc1, loc2 & desc2
?
代码:
var places = {
library: {
location: [
{
loc_name: "library1",
"desc": "desc1 : Modern and spacious building"
},
{
loc_name: "library2",
"desc": "desc2 : A cosy small building"
}
]
}
};
function contentClass(isShow) {
if (isShow) {
return "content";
}
return "content invisible";
}
class Toggle extends React.Component {
constructor(props) {
super(props);
this.state = { isShow: false };
this.handleClick = this.handleClick.bind(this);
}
handleClick() {
this.setState(function (prevState) {
return { isShow: !prevState.isShow };
});
}
render() {
const libraries_desc = places.library.location.map((libr) =>
<div>
<p>{libr.desc}</p>
</div>
);
const lib_names = places.library.location.map((libr) =>
<div>
<p>{libr.loc_name}</p>
</div>
);
return (
<div>
<div className='control' onClick={this.handleClick}>
<h4>{lib_names}</h4>
<div className={contentClass(this.state.isShow)}>{libraries_desc}</div>
</div>
</div>
);
}
}
render((
<Toggle />
), document.getElementById('root'));
当前的结果:
library1
library2
desc1 : Modern and spacious building
desc 2 : A cosy small building
所需的结果:
library1
desc1 : Modern and spacious building (hidden but shown when clicked)
library2
desc 2 : A cosy small building (hidden but shown when clicked)
它显示一个语法错误,在关闭location.map((溴化锂,指数)的标签,即使它正常关闭,之所以会如此 – Amma
它?我错误地修改了它,请看代码中的代码再次提交methid –
就是这样 - 现在工作了,谢谢! – Amma