今天发现在下载文件时候，使用打开新窗口或者当前页面跳转时，有些浏览器会拦截弹窗；
兼容大部分浏览器 下载文件时弹出浏览器的保存窗口
window.downloadFile = function (sUrl) {
//iOS devices do not support downloading. We have to inform user about this.
if (/(iP)/g.test(navigator.userAgent)) {
alert('Your device does not support files downloading. Please try again in desktop browser.');
return false;
}
//If in Chrome or Safari - download via virtual link click
if (window.downloadFile.isChrome || window.downloadFile.isSafari) {
//Creating new link node.
var link = document.createElement('a');
link.href = sUrl;
if (link.download !== undefined) {
//Set HTML5 download attribute. This will prevent file from opening if supported.
var fileName = sUrl.substring(sUrl.lastIndexOf('/') + 1, sUrl.length);
link.download = fileName;
}
//Dispatching click event.
if (document.createEvent) {
var e = document.createEvent('MouseEvents');
e.initEvent('click', true, true);
link.dispatchEvent(e);
return true;
}
}
// Force file download (whether supported by server).
if (sUrl.indexOf('?') === -1) {
sUrl += '?download';
}
window.open(sUrl, '_self');
return true;
}
window.downloadFile.isChrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
window.downloadFile.isSafari = navigator.userAgent.toLowerCase().indexOf('safari') > -1;
原文出自：https://blog.csdn.net/qq_31874947/article/details/79641215
