SOURCE

Object.prototype.changeKey = function (keyMap) {
    if (!keyMap) {
        return this
    }

    if (keyMap && typeof keyMap !== 'object') {
        throw Error('keyMap must be Obejct')
    }

    return Object.keys(this).reduce((prev, cur) => {
        prev[keyMap[cur]] = this[cur]
        return prev
    }, {})

}
let keyMap = {
    org_name: 'orgName',
    org_code: 'orgCode'
}

// use
let data = {
    org_name: 'mxx',
    org_code: '212121'
}
function proxyKey(data) {

    return new Proxy(data, {
        get(target, key, receiver) {
            const newKey = key.replace(/([A-Z])/g, "_$1").toLowerCase()
            if (!target[newKey]) {
                throw Error('this key is error')
            }
            return target[newKey]
        }
    })
}
let newData = proxyKey(data)
console.log(newData.orgCode)