How to make slidingown and navbar slideup when scrolling on page

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Hello, I am a beginner in jQuery and I am trying to configure the navbar of my site so that when it scrolls down, the navbar is hidden and there is only one button to open the navbar, and when you scroll up to the maximum that button invisible. I would like to know how this can be done.

The navbar div is as follows: 

<div id="menu" class="navbar navbar-default navbar-fixed-top" role="navigation" style="height:170px;">
  <div class="container">
    <div class="navbar-header">
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asked by anonymous 03.03.2016 / 14:31

1 answer

0

In the scroll event, you compare the height of the navbar with the position of the scroll. If the position of the scroll is greater than the height of the navbar, you hide it, otherwise it displays. 

$(document).scroll(onScrollBody);
function onScrollBody() {
    var currentScrollTop = $('body').scrollTop();
    //testar aqui se o a posição do scroll já é suficiente para esconder     
    //poderia ser assim, por exemplo:
    if(currentScrollTop > $('#menu').height()){
        $('#menu').hide();
    }
    else { $('#menu').show(); }
}

jquery scrollTop

I did not test, maybe it needs some adjustments, but the idea is this.

And maybe it makes more sense for you to remove this fixed navbar style, so it will normally go up along with the rest of the page in the scroll. Then you test the height of the scroll as in the example above and do not need to hide the navbar because it has already disappeared naturally, you only display the button mentioned and then do the opposite movement when the height of the scroll is less than the height of the navbar, you hide the button.

    
03.03.2016 / 19:09
wordpress get url from meta_key value Largest array number, does not display