What is the below syntax doing? More specifically, what exactly is the / and the i.test(navigator.userAgent)? Is this jquery stuff? Thanks!
if(( /(ipad|iphone|ipod|android|windows phone)/i.test(navigator.userAgent) )) {
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2 Answers
This:
/(ipad|iphone|ipod|android|windows phone)/i
is a regular expression literal. In this case, it's a expression that will match any of the substrings ipad, iphone, ipod, android, or windows phone. The i modifier at the end makes it case-insensitive.
This:
.test(navigator.userAgent)
is calling the test() method on that object. So it's checking whether navigator.userAgent contains any of the strings mentioned above.
Comments
navigator.userAgent gives you the string that hold the details of browser, OS etc. Something like this
Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/40.0.2214.111 Safari/537.36
And the regex detect if one of if them is found in the string or not. If found the condition become true else false.
