2020-04-22post请求？xx=xx&xx=xx&xx=

new URLSearchParams() 内置对象获取地

New URLSearchParams.png
址栏的参数 通过键的方式拿到值
let params = new URLSearchParams()
for (var i = 0; i < this.multipleSelection.length; i++) {
params.append('idList', this.multipleSelection[i].id)
}
fetch({
method: 'post',
url: /sbznjs/api/report/deleteBatch?${params},
}).then(res => {