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markbrown4/read-write.js

Created January 8, 2019 22:21
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Read / write access in Flow
Raw
read-write.js
// @flow
// read / write access
type ReadWriteType = {
+readOnly: number | string,
-writeOnly: string
};
function test(obj: ReadWriteType) {
const read = obj.readOnly;
obj.writeOnly = "Written";
obj.readOnly = "Not Written"; // readOnly is not writeable
const notRead = obj.writeOnly; // No Error
}
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