xml-to-react-loader

v1.0.0

Published

3 years ago

Webpack loader designed to parse an svg file into a an abstract React component.

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jacobfischer

XML to React Loader

A bundle loader intended to take XML files as input and produce abstract React components to render in React-style applications.

Unlike other loaders, this one does not assume the usage of React primitives for components. You can use your own Components or leave them as is. In addition, no transpiling should be required. This loader automatically generates valid JavaScript syntax that does not need to go through a jsx tool.

Setup

Add this loader as a rule for XML or XML derived files in your setup.

{
  module: {
    rules: [
      {
        test: /\.(svg|xml)$/,
        use: {
          loader: 'xml-to-react-loader'
        }
      }
    ]
  }
}

Alternatively you can manually invoke this loader on specific files

import Component from "!xml-to-react-loader!./path/to/file.xml";

Examples

If this is your xml file:

<note date="2020-07-07T23:04:29+00:00" author="John Doe">
  <heading>Reminder</heading>
  <body>Don't forget <bold>me</bold> this weekend!</body>
</note>

It will produce a JavaScript file roughly equivalent to the following:

import React from 'react';

export const Component = (
  getComponent: (tagname: string) => React.ReactNode,
  ...props: Record<string, unknown>
): React.FunctionComponent => {
  const Note = getComponent ? getComponent('node') : 'note';
  const Heading = getComponent ? getComponent('heading') : 'heading';
  const Body = getComponent ? getComponent('body') : 'body';
  const Bold = getComponent ? getComponent('bold') : 'body';

  return (
    <Note date="2020-07-07T23:04:29+00:00" author="John Doe" {...props}>
      <Heading>Reminder</Heading>
      <Body>Don&comma;t forget <Bold>me</Bold> this weekend!</Body>
    </Note>
  );
}

export default Component;

export const rootAttributes = {
  author: "John Doe",
  date: "2020-07-07T23:04:29+00:00",
};

Note: There is no need to transform the JSX syntax, this loader does that automatically. The JSX syntax in this example is preserved to enhance readability.

Usage

import NoteComponent from 'note.xml';

const tagMappings = {
  heading: 'h1',
  note: (props) => (
    <html>
      <body>
        <div {...props} />
      </body>
    </html>
  ),
  bold: 'b',
};

const Component = (props: {}) => (
  <NoteComponent
    getComponent={(tag) => tagMappings[tag] || 'p'}
    {...props}
  />
);

Because it is common that React primitive elements will not match your xml file 1:1, every component can take a getComponent prop to get your appropriate component for each tag.

It is simply a function that will be called with the tag string to get a component for, and should return something React can create, which means probably a string or Component.

Options

This loader accepts one option.

type Options = {
  reactPath?: string;
}

The option reactPath can be set if you have a unique path to react, the only required peer dependency. If this option is omitted the usual process of using require.context to get the path will be used. In most cases this should be sufficient.

TypeScript

This project is written and maintained in TypeScript. Because loaders are not directly a part of TypeScript, typings can be difficult. This module exports the appropriate types to expect from a file emitted from the loader, you will just need to hook up the definitions according to how you import them.

// your-typings-file.d.ts

import { XmlToReactLoaderExport } from 'xml-to-react-loader';

declare module '*.xml' {
  const _: XmlToReactLoaderExport;
  export = _;
}

// or

declare module '!xml-to-react-loader!*' {
  const _: XmlToReactLoaderExport;
  export = _;
}

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