react-docgen-displayname-handler

A handler for react-docgen that tries to infer the displayName of a component.

Rationale

react-docgen is a CLI and API toolbox to help extract information from React components and generate documentation from it.

react-docgen-displayname-handler is a custom handler for react-docgen and can be used to infer the displayName for a given component.

The handler tries to infer the displayName from the following sources:

• a static displayName property on the object / class
• the name of the function or class declaration/expression
• the name of the variable the component is assigned to
• (optional) the file name (if it is not "index")
• (optional) the last part of the file path (directory name)
• if everything fails the displayName is set to UnknownComponent

Installation

Install react-docgen-displayname-handler from npm

npm install --save react-docgen-displayname-handler

Usage

Unfortunately there is currently no easy way to use custom handlers with the react-docgen CLI.

Discussions and Ideas about how to make this easier are happening in the react-docgen issue discussions.

If you want to use this module programmatically check out the react-docgen API docs for more information about the react-docgen API.
Below is a small example that demonstrates how to integrate react-docgen-displayname-handler.

import reactDocs from 'react-docgen';
import displayNameHandler from 'react-docgen-displayname-handler';
const resolver = reactDocs.resolver.findExportedComponentDefinition;
const handlers = reactDocs.handlers.concat(displayNameHandler);
const documentation = reactDocs.parse(src, resolver, handlers);

If you want to use the filepath for displayName resolution too, check out the following example:

import reactDocs from 'react-docgen';
import { createDisplayNameHandler } from 'react-docgen-displayname-handler';
const resolver = reactDocs.resolver.findExportedComponentDefinition;
const handlers = reactDocs.handlers.concat(createDisplayNameHandler(filePath));
const documentation = reactDocs.parse(src, resolver, handlers);

In order to use the file path too, you need to import the named export createDisplayNameHandler which takes as an argument the file path and returns a handler function that can be passed to react-docgen.

Examples

When using this custom handler with react-docgen it will try to find the displayName of the component as outlined above.

import React from 'react';
export default class X extends React.Component {
  static displayName = 'MyComponent';
  render() {
    return <div />;
  }
}

{
  "displayName": "MyComponent",
  "props": {...}
}

import React from 'react';
export default class MyComponent extends React.Component {
  render() {
    return <div />;
  }
}

{
  "displayName": "MyComponent",
  "props": {...}
}

For more information about the data format see the react-docgen readme