const data = {

    id: 1,

    name: "张三",

    age: 22

}

let params = ""

/* Object.entries()方法返回一个数组，数组的每一个元素是对象的自有的可枚举属性的键值对，但不包括Symbol值的属性。

形如：[[key1, value1], [key2, value2], ... [keyn, valuen]] */

console.log(Object.entries(data)) // [ [ 'id', 1 ], [ 'name', '张三' ], [ 'age', 22 ] ]

for( const [key, value] of Object.entries(data)) {

    params += `${key}=${value}&`

}

if(params) {

    params = params.substring(0, params.length-1)

}

console.log(params) // id=1&name=张三&age=22

const data = {

    id: 1,

    name: "张三",

    age: 22

}

function getParams(obj = {}) {

    let temp = Object.entries(obj)

    let params = ""

    for( const [key, value] of temp) {

        params += `${params ? '&' : '?'}${key}=${value}`

    }

    return params

}

console.log(getParams(data)) // ?id=1&name=张三&age=22