键值是数字时的处理方式

    const content = ‘{"1":"凭订单详情页的入园凭证(入园辅助码或二维码)入园","2":"凭下单时预留的身份证入园","3":""}‘
    const newKey = [‘key1‘, ‘key2‘, ‘key3‘, ‘key4‘]

    function keyConversion(content = ‘{}‘, newKey = []) {
        const obj = JSON.parse(content)
        if (Object.keys(obj).length == 0) return {}
        let [arr, index] = [
            [], -1
        ]
        for (let key in obj) { //遍历拿取对象内的值 
            arr.push(obj[key]) //键值为数字时可以通过 obj[key] 的方式拿出来对应数字键值的值
        }
        return arr.reduce((pre, cur) => {
            index++
            return Object.assign(pre, { //每次在对象内合并增加一个新的键值对
                [newKey[index]]: cur
            })
        }, {})
    }
    const newObj = keyConversion(content, newKey)
    console.log(newObj)