在react JS应用程序中,在header组件中添加了一个通知图标。我已经创建了一个单独的组件,在那里我执行api调用来获取数据并显示它。我在这里试图实现的是,如果有一些通知警报,则更改标题组件中图标的颜色。
import React from "react";
import { connect } from "react-redux";
import {
setPoiData,
getNotification,
updateNotification
} from "../../actions/action";
import { Link } from "react-router-dom";
const axios = require("axios");
class Notification extends React.Component {
render() {
const data = this.props.getNotificationStatus;
const highlightBellIcon = Object.keys((data.length === 0))
return (
<div className="notification-parent">
<Link to="/notification-details">
<span className={"glyphicon glyphicon-bell " + (!highlightBellIcon ? 'classA' : 'classB')} />
</Link>
</div>
);
}
}
const mapStateToProps = state => ({
getNotificationStatus: state.root.getNotificationStatus
});
export default connect (mapStateToProps)(Notification)
在这里,getNotificationStatus是在Redux中保存值的状态。
通知详细信息组件-
import React from "react";
import { connect } from "react-redux";
import {
getNotification
} from "../../actions/action";
import { Spinner } from "../Spinner";
import { setTimeout } from "timers";
import NotificationTile from "../NotificationTile/NotificationTile";
const axios = require("axios");
class NotificationDetails extends React.Component {
componentDidMount = () => {
this.intervalId = setInterval(() => this.handleNotification(), 2000);
setTimeout(
() =>
this.setState({
loading: false
}),
10000
);
};
componentWillUnmount = () => {
clearInterval(this.intervalId);
};
handleNotification = () => {
let postData = {
//inputParams
}
//call to action
this.props.dispatch(getNotification(postData));
};
getNotificationDetails = data => {
const payloadData =
data.payLoad &&
data.payLoad.map(item => {
console.log(this);
return <NotificationTile {...item} history={this.props.history} />;
});
//console.log(payloadData);
return payloadData;
console.log("InitialState" + payloadData);
};
render() {
const { loading } = this.state;
const data = this.props.getNotificationStatus;
return (
<div className="notificationContainer container">
<div className="notification-alert">
{!loading ? (
this.getNotificationDetails(data)
) : (
<h1>
Waiting for notifications..
<Spinner />
</h1>
)}
</div>
</div>
);
}
}
const mapStateToProps = state => ({
getNotificationStatus: state.root.getNotificationStatus
});
export default connect(mapStateToProps)(NotificationDetails);
我面临的问题始终是classB被添加,因为api调用是在单击bell图标时发生的。因此,当我第一次登陆页面时,除非单击bell图标,否则不会调用api。我的代码工作得很好,只是我需要根据NotificationDetail Comp中收到的响应将类添加到我的通知组件(这是一个全局组件)中,NotificationDetail Comp是一个同级组件。有什么我出错的建议吗?