How to avoid brakes when requesting blocked resources?

Question

JavaScript

The site uses Vkontakte widgets - comments, likes, group, chat.
If someone has it blocked (at work, for example), then requests go, hang, slow down page loading.
How to avoid such sagging?
How to request resources asynchronously?

Answer 1

https://learn.javascript.ru/external-script
1) Move all scripts to the bottom of the page, before the closing tag 2) Add the async tag to scripts that do not affect the site. </body>