How to use JQuery to set the margin-top of an element equal to the height of another element

I am attempting to create a website layout with a header at the top that has a dynamic height but remains fixed in position, followed by a content area. My initial approach involved adding a fixed padding-top to an element in order to display the content below the header, using JavaScript and JQuery. Although I believe this method is ideal, it seems to be not fully functional.

[HTML]

<div class="contentPage" id="page_1" name="templates">
    <div class="contentPageHeader">
        <a href="#menu">
            <div class="pageBack">
                <h4>Back</h4>
            </div>
        </a>

        <h3>Templates</h3>
    </div>
    <div class="contentPageContent">
    </div>
</div>

[JS]

var headerHeight = $('.contentPageHeader').css( 'height' );
$('contentPageHeader').css('margin-top', headerHeight);

To see a demonstration, please visit this JSFiddle link

javascriptjqueryhtmlcss

Answer №1

You need to make adjustments to your javascript code:

    var headerHeight = $('.contentPageHeader').outerHeight();
    $('.contentPageContent').css('margin-top', headerHeight);

Furthermore, this snippet of code should be placed within the click method.

Check out the jsfiddle link for more details

Answer №2

Make sure to specify the unit for marginTop, such as px or %:

$('.contentHeader').css('margin-top', headerHeight + 'px');
//^^ forgot to add a selector (the dot)

Answer №3

Give this a shot 

$(document).ready(function () {
    $("a").click(function () {

        if (this.hash) {
            var hash = this.hash.substr(1);

            var $toElement = $("div[name=" + hash + "]");

            if (hash == "menu") {
                $('.contentPage').fadeOut(300);
                $($toElement).fadeIn(300);

            } else {
                $('#menu_holder').fadeOut(300);
                $($toElement).fadeIn(300);

            }
        }
       var headerHeight = $('.contentPageHeader').css( 'height' );  //added code here
       $('.contentPageHeader').css('margin-top', headerHeight);  
    });


});

Fiddle:https://jsfiddle.net/mdeujc0u/3/

Updated fiddle: https://jsfiddle.net/mdeujc0u/5/

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