post、get请求（查询字符串参数）将对象拼接为地址栏请求参数new URLSearchParams

const params = new URLSearchParams({
  param1: 'value1',
  param2: 'value2'
}).toString();

该方法可将param1和param2拼接为

param1=value1&param2=value2

实例

const url = 'https://example.com/api/resource';
const params = new URLSearchParams({
  param1: 'value1',
  param2: 'value2'
}).toString();

const data = {
  key1: 'value1',
  key2: 'value2'
};

fetch(`${url}?${params}`, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
  },
  body: JSON.stringify(data)
})
.then(response => response.json())
.then(data => console.log(data))
.catch(error => console.error('Error:', error));