Off-canvas menu and a fixed positioned header

Question

I am creating a very basic off canvas menu, everything is working brilliantly BUT this one small thing that I can't fix!

1. Visit www.loaistudio.com and re-size the window to under 1000px.
2. Scroll down a bit and then click on the Menu button from the top left on the header.

Why does it despair? it actually does not despair but it just move to the very top of the page! Why is that? How can I fix it and just keep it to the top of the view area...

Here is the HTML

<div id="page"><!--Main Container-->
    <!--Header (small screens only)-->
    <div id="secondHeader">
        <a class="secondHeader-menuButton" href="#">Menu</a>
        <p id="logo-smallScreen">Website Name</p>
    </div>

    <!--/////////////////////////////////////////////////-->

    <div class="wrapper">
        <div id="homeSectionA" class="content">

            <h1>Header One</h1>

            <h2>Header Two</h2>

            <h3>Header Three</h3>

            <h4>Header Four</h4>

            <br>

            <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</p>

            <br>

            <p><strong>Paragraph Strong</strong></p>

            <p><em>Paragraph Empaissaied</em></p>

            <p><small>Paragraph Small</small></p>

            <br>

            <a>I am a Button</a>

            <br><br>

            <p><strong>List</strong></p>

            <ul>
                <li>List Item</li>
                <li>List Item
                    <ul>
                        <li>Sub List Item</li>
                        <li>Sub List Item</li>
                    </ul>
                </li>
            </ul>

            <br>

            <p><strong>List</strong></p>

            <ol>
                <li>List Item</li>
                <li>List Item
                    <ol>
                        <li>Sub List Item</li>
                        <li>Sub List Item</li>
                    </ol>
                </li>
            </ol>

            <br>

            <p>Abber (<abbr title="Oh, you found me :)">Hover over me</abbr>).</p>

            <br>

            <p>Paragraph<sub>subscript.</sub></p>

            <br>

            <p>Paragraph<sup>subscript.</sup></p>

            <br>

            <p>Paragraph<mark>Marked Line</mark></p>

            <br>

            <img alt="" src="http://placehold.it/600x400/cdcdcd">
        </div>
    </div>

    <!--Footer-->
    <footer id="footer">
        <?php include ("assets/templates/footer.inc"); ?>
    </footer>
</div><!--The End Of The Page-->

CSS

/* Landscape Tablets //////////////////////////////////////////////////////////////////////////////////*/
@media screen and (max-width: 1024px) {

    body, #headerContent {
        min-width: 100%;
    }

    /*PAGE LAYOUT ==================================================================*/
    /*Main Page Container*/#page {
        padding-top: 50px;
        z-index: 1;
        -webkit-box-shadow: -3px 0px 20px rgba(0, 0, 0, 0.8);
        -moz-box-shadow: -3px 0px 20px rgba(0, 0, 0, 0.8);
        box-shadow: -3px 0px 20px rgba(0, 0, 0, 0.8);

        -webkit-transition: all 0.2s ease-out;
        -moz-transition: all 0.2s ease-out;
        -ms-transition: all 0.2s ease-out;
        -o-transition: all 0.2s ease-out;
        transition: all 0.2s ease-out;
    }

    /*Content Container*/
    .content {
        padding: 30px;
    }


    /*HEADER ======================================================================*/
    /*Header Wrapper*/
    #headerWrapper {
        background-color: #191E25;

        width: 200px; height: 100%;
        z-index: 0;

        -webkit-box-shadow: none;
        -moz-box-shadow: none;
        box-shadow: none;

        -webkit-transition: all 0.2s ease-out;
        -moz-transition: all 0.2s ease-out;
        -ms-transition: all 0.2s ease-out;
        -o-transition: all 0.2s ease-out;
        transition: all 0.2s ease-out;

        -webkit-transform: translate(-200px, 0px);
        -moz-transform: translate(-200px, 0px);
        -o-transform: translate(-200px, 0px);
        -ms-transform: translate(-200px, 0px);
        transform: translate(-200px, 0px);      
    }

        #headerWrapper.headerOpen {
            -webkit-transform: translate(0px, 0px);
            -moz-transform: translate(0px, 0px);
            -o-transform: translate(0px, 0px);
            -ms-transform: translate(0px, 0px);
            transform: translate(0px, 0px);    
        }

        #page.pageOpen {
            -webkit-transform: translate(200px, 0px);
            -moz-transform: translate(200px, 0px);
            -o-transform: translate(200px, 0px);
            -ms-transform: translate(200px, 0px);
            transform: translate(200px, 0px);  
        }


    /*Header Content Container*/
    #headerContent {
        width: 210px; height: 100%;
        padding: 0;
        margin: 0;
        overflow-y: auto;
        overflow-x: hidden;
    }

        /*Header Logo*/
        #headerLogo {
            display: none;
        }

        /*Main Menu*/
        #mainMenu, #mainMenu li {
            text-align: left;
            margin-top: 0;
            float: none;
        }

        #mainMenu a {
            color: #A0A8B1;
            border-bottom: 1px solid #13171C;

            width: 100%;  
            padding: 20px 0px 20px 20px;
            margin: 0;

            border-radius: 0;
            -moz-border-radius: 0;
            -webkit-border-radius: 0;
        }

            #mainMenu a:hover {
                color: #CACFD3;
                background-color: #232A34;
            }

            #mainMenu a.active {
                color: #6E737A;
                background-color: #13171C;
            }


    /*Second Header Container & Elements (Hidden From Widescreen)*/
    #secondHeader {
        color: #FFFFFF;
        background-color: #49AB8E;
        border-bottom: 1px solid #398770;

        width: 100%;
        display: block;
        position: fixed; top: 0;
        padding: 0 20px 0 0;
        z-index: 1000;
        line-height: 50px;
    }

        .secondHeader-menuButton {
            background: #41997F url('../../assets/elements/nav-icon.png') no-repeat 20px;
            background-size: 25px 24px;
            width: 120px;
            display: inline-block;
            font-weight: bold;
            text-indent: 55px;
        }

            .secondHeader-menuButton-active {
                background: #41997F url('../../assets/elements/nav-icon-close.png') no-repeat 20px;
                background-size: 25px 24px;
            }

        #logo-smallScreen {
            display: inline-block;
            float: right;
        }



    /*PAGES ======================================================================*/ 
    /*Contact Page*/
    #contactDetails {
        width: 50%;
        padding-left: 50px;
        margin-left: -6px;
        text-align: center;
    }

    #contactForm {
        width: 50%;
    }

}





/*//////////////////////////////////////////////////////////////////////////////////////////////////////*/
/* Portrait Tablets ///////////////////////////////////////////////////////////////////////////////////*/
@media screen and (max-width: 770px) {

    /*PAGE LAYOUT =================================================================*/
    /*Content Container*/.content {
        padding: 20px;
    }


    /*PAGES ======================================================================*/
    /*Contact Page*/    
    #contactDetails, #contactForm {
        width: 100%;
        padding: 0;
        margin: 0;
    }

    #contactDetails {
        margin-top: 30px;
    }

}





/*//////////////////////////////////////////////////////////////////////////////////////////////////////*/
/* Phones /////////////////////////////////////////////////////////////////////////////////////////////*/
@media screen and (max-width: 500px) {

    /*PAGES ======================================================================*/
    /*Contact Page*/
    #contactDetails-normal {
        display: none;
    }

    #contactDetails-smart {
        display: block;
        border-top: 1px solid #CED1D6;
        padding-top: 30px;
    }

        #contactDetails-smart a {
            color: #FFFFFF;
            background-color: #49AB8E;

            width: 100%;
            padding: 10px 15px;
            margin-bottom: 10px;

            border-radius: 3px;
            -moz-border-radius: 3px;
            -webkit-border-radius: 3px;
        }

            #contactDetails-smart a:hover, 
            #contactDetails-smart a:active {
                background-color: #398770;
            }

}





/*//////////////////////////////////////////////////////////////////////////////////////////////////////*/
/* Mini Devices ///////////////////////////////////////////////////////////////////////////////////////*/
@media only screen and (max-width: 290px) {

    #logo-smallScreen {
        display: none
    }

}

JavaScript:

$(document).ready(function() {

    //Prevent clicking on .active links
    'use strict'; $('.active').click(function(a) {
        a.preventDefault();
    });

    //Smart Navigation
    $(".secondHeader-menuButton").on('touchstart click',  function(e) {
        e.preventDefault();
        $("#page").toggleClass("pageOpen");
        $("#headerWrapper").toggleClass("headerOpen");
        $(this).toggleClass("secondHeader-menuButton-active");
    });

    $('.content').on('touchstart click', function() {
        $("#page").removeClass("pageOpen");
        $('#headerWrapper').removeClass('headerOpen');
        $('.secondHeader-menuButton').removeClass("secondHeader-menuButton-active");
    });

}); 

Answer 1

Try changing your #headerWrapper transitions to:

-moz-transition: -moz-transform 0.2s ease-out;
-o-transition: -o-transform 0.2s ease-out;
-webkit-transition: -webkit-transform 0.2s ease-out;
transition: transform 0.2s ease-out

As for the header becoming "unfixed" after the translate: this seems to be a known bug in Webkit .

You can fix it by:

1) moving #secondHeader outside of #page:

    <body>
      <header id="headerWrapper"></header>
      <div id="secondHeader"></div>
      <div id="page"></div>
    </body>

2) adding a new CSS class:

    #page.pageOpen, #secondHeader.pageOpen {
        -webkit-transform: translate(200px, 0px);
        -moz-transform: translate(200px, 0px);
        -o-transform: translate(200px, 0px);
        -ms-transform: translate(200px, 0px);
        transform: translate(200px, 0px);  
    }

3) add transitions to #secondHeader

    #secondHeader {
      -moz-transition: -moz-transform 0.2s ease-out;
      -o-transition: -o-transform 0.2s ease-out;
      -webkit-transition: -webkit-transform 0.2s ease-out;
      transition: transform 0.2s ease-out
    }

4) toggling this class via Javascript as well:

$(".secondHeader-menuButton").on('touchstart click',  function(e) {
    e.preventDefault();
    $("#page, #secondHeader").toggleClass("pageOpen");
    $("#headerWrapper").toggleClass("headerOpen");
    $(this).toggleClass("secondHeader-menuButton-active");
});

$('.content').on('touchstart click', function() {
    $("#page, #secondHeader").removeClass("pageOpen");
    $('#headerWrapper').removeClass('headerOpen');
    $('.secondHeader-menuButton').removeClass("secondHeader-menuButton-active");
});

Answer 2

First of all, the menu doesn't disappear. It is merely moving to the top of #page . When you scroll to the top, you will see it.

This is documented behaviour, see MDN - transform

Summary
...
If the property has a value different than none, a stacking context will be created. In that case the object will act as a containing block for position: fixed elements that it contains.

This means, instead of body, #page will be now the containing block for #secondHeader .

Since secondHeader is position: fixed; top: 0; position: fixed; top: 0; , it will be now fixed at the top of page .

As @janfoeh has shown, you can "fix" it by moving the inner div outside, and duplicate the necessary transformation on the inner (now outside) div.