在ajax请求上保持滚动位置

Question

I have an one-page website with a lot of containers.

The content of each container is loaded via ajax (asynchron, means not every container is filled with data at the same time).

The containers have a dynamic height (height: auto).

The website is controlled with an intelligent routing system (if you enter a specific url, the website scrolls to the given element on load).

How can I scroll to a container (for example container 5) and keep this container on the same scroll-position (should be changable by user-scrolling) while the other containers are loading? If the containers have a fixed height, the whole thing works without any problems but at the moment, the scroll-position changes on every load or change of any of those containers.

Do you know a plugin or a good way to resolve this problem?

Example of the problem: http://jsfiddle.net/b6sno9cv/

// Global variable to define start-container:
var initialWidgetIdx = 10;

Expected result:

Scroll to container 10 and stay there (scroll-position on this container), even if the other containers are not completly loaded.

(Once every container is loaded (has fixed height now), the scroll works without any problem)

Answer 1

You can use offsetHeight to get the height of the element. In your case, you can check the height of the div in your ajax request and then use scrollBy , like this

xmlhttp.onreadystatechange=function(){
    if (xmlhttp.readyState != 4) return
        if (xmlhttp.status == 200) {
            //do some stuff you need

            var scroll_value = document.getElementById('div_that_loaded').offsetHeight();
            window.scrollBy(0,scroll_value);
            }
        }