Manipulating element height in AngularJS

My goal is to utilize the bootstrap style for a fixed navigation bar at the top of the page. By using navbar-fixed-top, I can fix an element to the top. The visibility of #subnav will be determined by the value of showsubnav.

<div id="backnav">
    <div id="topnav" class="container-fluid navbar-fixed-top">
        <nav id="mainnav" class="navbar navbar-default"></nav>
        <nav id="subnav" class="navbar navbar-inverse" ng-show="showsubnav"></nav>
    </div>
</div>

http://jsfiddle.net/20f02378/

I am trying to figure out how to make the height of #backnav match that of #topnav.

javascriptcssangularjstwitter-bootstrap

Answer №1

The issue with your desired outcome can be understood through this query How to center an element

Simply determining the height of the element will not solve the problem unless you plan on adjusting the top padding of the content you want to move down, or modifying the CSS properties. Nonetheless, to find out the height of an element:

const elemHeight = document.getElementById('someElement').clientHeight;

Answer №2

In my previous comment, I mentioned that you can use ngStyle to achieve this particular task. Here is a solution that demonstrates how to do so.

<div ng-style="myStyle" ng-controller="MainController">
    <div id="topnav" class="container-fluid navbar-fixed-top">
        <nav id="mainnav" class="navbar navbar-default"> 
            <ul class="nav navbar-nav navbar-right">
                <li><a href="#">Link</a></li>
            </ul>
        </nav>
        <nav id="subnav" class="navbar navbar-inverse" ng-show="Config.showsubnav">
            <ul class="nav navbar-nav navbar-right">
                <li><a href="#">Link</a></li>
            </ul>
        </nav>
    </div>
</div>

Additionally, here is the relevant code snippet from the controller:

app.controller('MainController', ['$scope','Config', function($scope,Config){
$scope.Config = Config;
$scope.myStyle={};
$scope.myStyle.border="1px solid blue";
$scope.myStyle.height="59px";  
if(Config.showsubnav)
{
    $scope.myStyle.height="118px";  
}
}]);

I trust that this information meets your requirements. Feel free to check out the demo on JSFiddle.

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