babel-plugin-flow-type-getter

Access your Flow types from classes before you instantiate objects.

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To use :

npm install --save-dev babel-plugin-flow-type-getter babel-plugin-transform-flow-strip-types

.babelrc

{
  "plugins": ["flow-type-getter", "transform-flow-strip-types"]
}

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Example

class Test1 {
  prop1: number;
  prop2: Test2;
  prop3: string | Test1;
}
class Test2 {
  prop1: string;
  prop2: Array<number>
  prop3: ?Array<Test1 | string>;
}

typeof Test1.prop1; // 'number'
typeof Test1.prop3; // 'string | Test1'
typeof Test1.prop2 == 'Test2'; // true
typeof Test2.prop1 == 'Test1'; // false
Array.isArray(Test2.prop3); // true

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Run the example

-Navigate to the example directory of the project
-Open the file index.js in a text editor (only do this if you want to expriment)
-Enter the command npm run build to start the babel --watch process (keep this shell open)
-In a new shell, enter the command npm start to see the values logged out in example/index.js