posts/urls-support-slash-slash.en.html

   1 <!-- subject: {URLs} with <code>//</code> at the beginning -->
   2 <!-- date: 2022-12-04 02:09:04 -->
   3 <!-- tags: url, parsing, lazydevs -->
   4 <!-- categories: Articles, Techblog -->
   5
   6 <p>A quick reminder that relative URLs can start with a double slash and
   7   that this means something different than a single slash at the beginning.
   8   Specifically, such relative addresses are resolved by taking the schema (and
   9   only the schema) of the website they are on.
  10
  11 <p>For example, the code for the link to my repositories in the site’s header
  12   is <code>&lt;a
  13   href="//<wbr>github.com/<wbr>mina86"&gt;<wbr>Code<wbr>&lt;/a&gt;</code>.
  14   Since this page uses <code>https</code> schema, browsers will navigate
  15   to <code>https://github.com/mina86</code> if the link is activated.
  16
  17 <p>This little trick can save you some typing, but more importantly, if you’re
  18   developing a URL parsing code or a crawler, make sure that it handles this
  19   case correctly.  It may seem like a small detail, but it can have a lasting
  20   impact on the functionality of your code.