src URL中的\\ / \\ /

Question

I can't find a way to google this answer, and I'm not sure what the best title for this question would be either. If you go to a video on facebook, such as https://www.facebook.com/sari.electronplus/videos/10208501562556645/

and you look at the source, there are all these lines with url's

 {"type":"js","src":"https:\\/\\/www.facebook.com\\/rsrc.php\\/v3ixjD4\\/yL\\/l\\/en_US\\/WwzFPTYi5Xh.js?_nc_srcc=2665","crossOrigin":1},"CDaAd": 

For what reason are there "/"s instead of "/" in the link?

Answer 1

It helps when embedding in a script tag which doesn't allow certain characters.

See this answer: https://stackoverflow.com/a/1580682/1927618