Transform error with mode=wrap for TypeScript class component static propTypes type definition

[kryops]

Code (TypeScript):

import React, { Component } from 'react';

export class Foobar extends Component {

    static propTypes: {};

    render() {
        return null;
    }
}

Foobar.propTypes = {};

Config:

{
  "presets": [
    "@babel/preset-react",
    "@babel/preset-typescript"
  ],
  "plugins": [
    ["transform-react-remove-prop-types", {
      "mode": "wrap"
    }]
  ]
}

throws the error

$ babel index.tsx
TypeError: /home/michael/git/babel-prop-types-issue/index.tsx: Property right of AssignmentExpression expected node to be of a type ["Expression"] but instead got undefined
    at Object.validate (/home/michael/git/babel-prop-types-issue/node_modules/@babel/types/lib/definitions/utils.js:132:11)
    at validateField (/home/michael/git/babel-prop-types-issue/node_modules/@babel/types/lib/validators/validate.js:24:9)
    at validate (/home/michael/git/babel-prop-types-issue/node_modules/@babel/types/lib/validators/validate.js:17:3)
    at builder (/home/michael/git/babel-prop-types-issue/node_modules/@babel/types/lib/builders/builder.js:38:27)
    at Object.assignmentExpression (/home/michael/git/babel-prop-types-issue/node_modules/@babel/types/lib/builders/generated/index.js:260:31)
    at remove (/home/michael/git/babel-prop-types-issue/node_modules/babel-plugin-transform-react-remove-prop-types/lib/remove.js:77:54)
    at ClassProperty (/home/michael/git/babel-prop-types-issue/node_modules/babel-plugin-transform-react-remove-prop-types/lib/index.js:253:37)
    at NodePath._call (/home/michael/git/babel-prop-types-issue/node_modules/@babel/traverse/lib/path/context.js:55:20)
    at NodePath.call (/home/michael/git/babel-prop-types-issue/node_modules/@babel/traverse/lib/path/context.js:42:17)
    at NodePath.visit (/home/michael/git/babel-prop-types-issue/node_modules/@babel/traverse/lib/path/context.js:92:31) {
  code: 'BABEL_TRANSFORM_ERROR'
}

[ifree92]

For me, that doesn't work completely with *.tsx files. After compilation - propTypes object is absent.

[ifree92]

The better solution I found:

MyComponent['propTypes'] = { ... };

[rpearce]

@kryops I just randomly found this, but shouldn't it be static propTypes = {};, not with a :?

[kryops]

@rpearce that would be the workaround.

The above code is however valid TypeScript, first only declaring the member and its type, then assigning its value later. When migrating our codebase to TypeScript, this was the minimal change required to make TypeScript happy about the prop types.