ajax jquery - why this extra slash? -

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I often see the code where AJAX files are being contacted ( somefile.php In the example below), it may be / before /

, to preserve the structure. Www.example.com/somefile.php Or to avoid security reasons? If this is the latter, then an explanation will also help. 

  $ Post ('/ somefile.php', {id: id, val: val}, function (data) {if (some) {do something} second {do something else}});

Thanks.

This indicates the root of the site, in links or images, just like every URL.
For example, if you are on http://example.com/sub/site.html , then somefile.php http://example.com/ Sub / somefile.php , while /somefile.php goes to the http: // example. Com / somefile.php


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