Plain JavaScript - ScrollIntoView inside Div
I think I have a start for you. When you think about this problem you think about getting the child div into the viewable area of the parent. One naive way is to use the child position on the page relative to the parent's position on the page. Then taking into account the scroll of the parent. Here's a possible implementation.
function scrollParentToChild(parent, child) {
// Where is the parent on page
var parentRect = parent.getBoundingClientRect();
// What can you see?
var parentViewableArea = {
height: parent.clientHeight,
width: parent.clientWidth
};
// Where is the child
var childRect = child.getBoundingClientRect();
// Is the child viewable?
var isViewable = (childRect.top >= parentRect.top) && (childRect.bottom <= parentRect.top + parentViewableArea.height);
// if you can't see the child try to scroll parent
if (!isViewable) {
// Should we scroll using top or bottom? Find the smaller ABS adjustment
const scrollTop = childRect.top - parentRect.top;
const scrollBot = childRect.bottom - parentRect.bottom;
if (Math.abs(scrollTop) < Math.abs(scrollBot)) {
// we're near the top of the list
parent.scrollTop += scrollTop;
} else {
// we're near the bottom of the list
parent.scrollTop += scrollBot;
}
}
}
Just pass it the parent and the child node like this:
scrollParentToChild(parentElement, childElement)
Added a demo using this function on the main element and even nested elements
https://jsfiddle.net/nex1oa9a/1/
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JDC
Supporting people in their daily needs, exciting by innovation and creating awesome products using creativity and engineering - that's what motivates me as a passionate developer.
Updated on September 15, 2022Comments
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JDC over 1 year
I have the requirement to scroll a certain element inside a div (not a direct child) into view.
Basically I need the same functionality as ScrollIntoView provides, but for a specified parent (only this parent should scroll).
Additionally it is not possible for me to use any 3rd party libraries.
I am not quite sure on how to approach this problem, as I do very limited JavaScript development. Is there someone that could help me out?
I found this code that would do exactly what I need, but unfortunately it requires JQuery and I was not able to translate it to plain JavaScript.
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Tobias Alt over 6 yearsbtw the idea of "id" is that you can GETURL parameter - a bit advanced using. Just try the window.location.href = "mydiv".
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JDC over 6 yearsWouldn't this scroll the complete page? I edited the question. For me it would be important that only the specified parent scrolls.
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Tobias Alt over 6 yearsOkay now I got it - just jump inside the parent is your requirement. Then you need additional CSS.