模拟点击及下载（a标签有关）

function triggerclick(ele){
if(ele instanceof $){
ele = ele[0]
}
var clickEvent = document.createEvent("MouseEvents");
clickEvent.initEvent("click", true, true);
ele.dispatchEvent(clickEvent);
}

function downloadFile(url, name = "file.json") {
let a = document.createElement("a")
a.setAttribute("href", url)
a.setAttribute("target", "_blank")
a.setAttribute("download", name)
let clickEvent = document.createEvent("MouseEvents");
clickEvent.initEvent("click", true, true);
a.dispatchEvent(clickEvent);
}

function downloadFileByJSON(json) {
var blob = new Blob([JSON.stringify(json)], { type: "text/plain;charset=utf-8" })
var url = URL.createObjectURL(blob);
downloadFile(url)
}

function downloadFileByText(text, name) {
var blob = new Blob([text], { type: "text/plain;charset=utf-8" })
var url = URL.createObjectURL(blob);
downloadFile(url, name)
}