javascript - How can I know whether the scroll of the user is UP or DOWN? -


I want to determine the book of users. I am using jQuery ..and jquery is a .scroll event. But the .scroll event can not determine whether the user is scrolling down or up the page.

You can start with a variable like this: 

 < Code> var position = $ (window) .scrollTop (); // should start with 0

and after that it monitors whether the scrolltop is rising up or down: 

  $ ( Window) .scroll (function) (Var scroll = $ (window) .scrollTop (); if (scroll> position) {console.log ("scroll downwards");} else {console.log ( "Scroll up");} position = scroll;});  
 
 = "snippet-code snippet-present-hidden"> 
  var status = $ (window) .scrollTop (); $ (window) .scroll (function () {var scroll = $ (window) .scroll Top (); if (scroll and position; position) {console.log ("scroll downward"); else {console.log ("scrolling upwards");} position = scroll;}); < / Code> 
 
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