html - why my screen width is wider than my actual screen width? -


i'm trying use this:

@media screen (min-width: 300px) , (max-width:768px){     body{display:none;} }

but doesn't work, when check screen width using $(window).width() result 980 on google chrome responsive mode 320 x 700. question why result of $(window).width() wider actual screen width ?

this screen shot


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