use angularjs directive to position a div absolutely aligned with the right edge of another div

I am attempting to use an angularjs directive to align the right side of an absolute div with another div. The code is working, but I am encountering an issue where the children divs are slightly wider than their parent, causing the offsetWidth value to be incorrect.

jsfiddle

Here is my directive code:

app.directive('alignElementRight', function ($document) {
return {
    restrict: 'A',
    scope: {
        alignElementRight: '@'
    },
    link: function (scope, element, attrs) {
        scope.$watch('alignElementRight', function (value) {
            console.log(value);

            var relEleme = $document.find('#' + value);
            var myEl = angular.element(document.querySelector('#' + value));
            var elOffsetLeft = myEl[0].offsetLeft;
            var elOffsetTop = myEl[0].offsetTop;
            var elOffsetWidth = myEl[0].offsetWidth;

            console.log('main width:' + elOffsetWidth);

            var absElemOffsetWidth = element[0].offsetWidth;
            console.log('menu: ' + absElemOffsetWidth);

            var newOffsetLeft = Math.abs(elOffsetLeft + elOffsetWidth - absElemOffsetWidth);
            element.css({
                left: newOffsetLeft + 'px'
            });
        });


    }
};

Answer №1

To solve the issue at hand, the most straightforward solution would be to simply reset the negative margin settings in Bootstrap for .row elements. This is what's causing all the confusion, although your calculations are spot on otherwise:

.row {
    margin: 0;
}

Check out the updated code here: http://jsfiddle.net/6c7k23tf/2/

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