all files / src/helpers/ local-state.js

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const createLocalState = (initialState) => {
    const state = Object.assign({}, initialState)
    return {
        set: (key, value) => setValue(key, value, state),
        get: function (key) {
            if (arguments.length === 0) return state
            return getValue(key, state)
        }
    }
}
 
const setValue = (key, value, state) => state[key] = value
const getValue = (key, state) => state[key]
 
export default createLocalState