const url = require("url")


function imgName(urlPath) {
    return url.parse(urlPath).path.split("/pic/")[1].split("/")[1]
}

var a = imgName("https://www.mmav.me/uploadfile/pic/20210430/467_25_ZaWXZk0VFxCGE6GHU6lr.jpg");
console.log(a)