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react-rss

1.0.0
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  • License MIT

React component capable of reading and rendering any RSS feed

Package Exports

  • react-rss

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (react-rss) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

react-rss

Higher order component capable of injecting RSS feed from any url into props.

So far this feed only supports standard RSS params defined in: https://validator.w3.org/feed/docs/rss2.html.

Example of usage

Display component enhanced with react-rss

import React, { FunctionComponent } from 'react';
import rssEnhancer, { InjectionRSSProps } from 'react-rss';

const DefaultRSSComponent: FunctionComponent<{ label: string } & InjectionRSSProps> = props => (
    <div>
        <h2>{props.label}</h2>
        <a href={props.rss.header.link}>
            {props.rss.header.title}
        </a>
        <ul>
            {props.rss.items.map(item => (
                <li>
                    {item.description}
                </li>
            ))}
        </ul>
    </div>
);

export default rssEnhancer(
    DefaultRSSComponent,
    'https://techbeacon.com/rss.xml',
);

Component enhanced with react-rss

class SourcedRSSComponent extends Component<{ label: string } & InjectionRSSProps> {
    public render() {
        const { props } = this;
        return (
            <div>
                <h2>{props.label}</h2>
                <a href={props.rss.header.link}>
                    {props.rss.header.title}
                </a>
                <ul>
                    {props.rss.items.map(item => (
                        <li>
                            {item.description}
                        </li>
                    ))}
                </ul>
            </div>
        );
    }
};

export default rssEnhancer(
    SourcedRSSComponent
);

Resulting use

import React from "react";
import ReactDOM from "react-dom";
import DefaultRSSComponent from "./DefaultRSSComponent";
import SourcedRSSComponent from "./SourcedRSSComponent";

interface State {
    value: string;
    rssUrl: string;
}

class TestRSS extends React.Component<{}, State> {
    state: State = {
        value: '',
        rssUrl: '',
    }
    public render() {
        const { state } = this;
        return (
            <div>
                <input value={state.value} onInput={e => this.setState({ value: (e.target as HTMLInputElement).value })} />
                <button onClick={() => this.setState(prevState => ({ rssUrl: prevState.value }))}>Test component</button>
                {state.rssUrl && (
                    <SourcedRSSComponent
                        url={state.rssUrl}
                        subscribe={true}
                        label="Sourced"
                        loadingComponent={() => <div>Loading sourced</div>}
                        errorComponent={e => {
                            console.error(e);
                            return <div>Failed to load this resource!</div>;
                        }}
                    />
                )}
                <DefaultRSSComponent
                    label="Default"
                    loadingComponent={() => <div>Loading default..</div>}
                    errorComponent={() => <div>Sadly, no default rss :(</div>}
                />
            </div>
        );
    }
}

ReactDOM.render(
    <TestRSS />,
    document.getElementById("root"),
);

Changes since 1.0.0

Fixed typos in typings of this package. Added enhancers, which allow you to pick custom xml elements (using query selectors) out of RSS and add them to the component props.

Also, fixed default parsing of RSS XML document and added component update mechanism when passed url changes.

Example of use

/**
 * Props injected have a two-type template: first is header enhancement, second one is with what is each item enhanced.
 */
class SourcedRSSComponent extends Component<{ label: string } & InjectionRSSProps<{ hasImage: boolean }, { mediaUrl?: string }>> {
    public render() {
        const { props } = this;
        return (
            <div>
                <h2>{props.label}</h2>
                <a href={props.rss.header.link}>
                    {props.rss.header.title}
                    {props.rss.header.hasImage && ' Has image!'}
                </a>
                <ul>
                    {props.rss.items.map(item => (
                        <li>
                            {item.description}
                            {item.mediaUrl && <span>Url: {item.mediaUrl}</span>}
                        </li>
                    ))}
                </ul>
            </div>
        );
    }
};

export default rssEnhancer(
    SourcedRSSComponent,
    null, // Default url is null, which means resulting component will need an url passed in its props.
    url => ({ input: url, init: { method: 'POST' } }), // Enhances the used url request by any optional parameter, such as headers, method, etc.
    (rss, header) => { // Enhances header portion of result
        return { ...header, hasImage: Boolean(rss.querySelector('image')) };
    },
    (rssItem, item) => { // Enhances each item by certain query
        const mediaUrl = rssItem.querySelector('content')?.getAttribute('url');
        if (mediaUrl) {
            return { ...item, mediaUrl };
        }
        return item;
    }
);

Addendum

You can either setup an URL in the enhancer, or in the resulting component. However, the url has to be set. You can rewrite default url with the one on component.

If you have any ideas on how to improve this package, do not hesitate to file in a pull request or an issue on github.