Transform error while integrating flow-runtime-mobx with react native (ios)

[PavanGangireddy]

This is a:

• [x] Bug Report
• [ ] Feature Request
• [ ] Question
• [ ] Other

Which concerns:

• [x] flow-runtime
• [x] babel-plugin-flow-runtime
• [ ] flow-runtime-validators
• [x] flow-runtime-mobx
• [ ] flow-config-parser
• [ ] The documentation website

---

What is the current behaviour?

I have got transform error while implementing mobx support for flow runtime in react native ios, it is:

error: bundling failed: "TransformError: /../../node_modules/react-native/Libraries/Renderer/shims/ReactNativeTypes.js:/../../node_modules/react-native/Libraries/Renderer/shims/ReactNativeT.ypes.js: Property value expected type of string but got null"

---

What is the expected behaviour?

• It has to work like mentioned here: https://codemix.github.io/flow-runtime/#/flow-runtime-mobx

---

Which package versions are you using?

• babel-eslint: 8.0.2
• babel-plugin-flow-react-proptypes: 6.1.0
• babel-plugin-module-resolver:3.0.0-beta.5
• babel-plugin-transform-class-properties: 6.24.1
• babel-plugin-transform-decorators-legacy: 1.3.4
• babel-plugin-transform-react-remove-prop-types: 0.4.10
• babel-preset-es2015: 6.24.1
• babel-preset-flow: 6.23.0
• babel-preset-react-native: 2.1.0
• react: 16.0.0
• react-native: 0.48.4
• mobx: 3.3.1
• mobx-persist: 0.3.4
• mobx-react: 4.3.3

---

.babelrc

{
  "presets": ["react-native", "flow"],
  "env": {
    "development": {
      "plugins": [
        ["flow-react-proptypes", { "ignoreNodeModules": true }],
        [
          "transform-react-remove-prop-types",
          {
            "mode": "remove",
            "ignoreFilenames": ["node_modules"],
            "removeImport": true
          }
        ],
        [
          "flow-runtime",
          {
            "assert": true,
            "annotate": true
          }
        ]
      ]
    }
  },
  "plugins": [
    "transform-decorators-legacy",
    "transform-class-properties",
    [
      "module-resolver",
      {
        "extensions": [".js", ".ios.js", ".android.js"]
      }
    ]
  ],
  "comments": false
}

---

NOTE: Have posted the same here: https://stackoverflow.com/questions/48424965/transformerror-property-value-expected-type-of-string-but-got-null Have looked into this, https://github.com/codemix/flow-runtime/issues/17 tried solutions suggested by @phpnode and @skovhus and others, but no progress 👎

[semireg]

I have posted a similar issue here: https://github.com/codemix/flow-runtime/issues/216