前言

HTTP/2 相比于 HTTP/1.1，可以说是大幅度提高了网页的性能，只需要升级到该协议就可以减少很多之前需要做的性能优化工作，当然兼容问题以及如何优雅降级应该是国内还不普遍使用的原因之一。

虽然 HTTP/2 提高了网页的性能，但是并不代表它已经是完美的了，HTTP/3 就是为了解决 HTTP/2 所存在的一些问题而被推出来的。

一、HTTP/1.1发明以来发生了哪些变化？

如果仔细观察打开那些最流行的网站首页所需要下载的资源的话，会发现一个非常明显的趋势。 近年来加载网站首页需要的下载的数据量在逐渐增加，并已经超过了2100K。但在这里我们更应该关心的是：平均每个页面为了完成显示与渲染所需要下载的资源数已经超过了100个。

正如下图所示，从2011年以来,传输数据大小与平均请求资源数量不断持续增长，并没有减缓的迹象。该图表中绿色直线展示了传

https://developers.google.com/web/updates/2017/09/abortable-fetch

Currently it is only implemented in Firefox 57 and is coming to other browsers soon.

const controller = new AbortController();
const signal = controller.signal;

setTimeout(() => controller.abort(), 5000);

fetch(url, { signal }).then(response => {
  return response.text();
}).then(text => {
  console.lo

Bug report - you can view the issue here: http://jsfiddle.net/bradhogan1983/sxwge12m/

When using the iframe option and clicking a link to open the modal, the modal opens instantly, but the iframe takes a second to load and while loading the modal container is just a small empty box. This happens on your demo as well as my local dev site. I'll also attach a screenshot of what I'm seeing on my

jquery-confirm version:
v3.3.4

I'm submitting a ... (check one with "x")
[ ] bug report
[X] feature request
[ ] support request

Expected behavior:
It would be very good if, when opening Confirm, the main page was blocked for navigation, only access to the dialog.

Steps to reproduce:
open confirm and press tab a few times.