Locate the X and Y coordinates of an inline element in JavaScript in order to position a popup box beside

Question

Locate the X and Y coordinates of an inline element in JavaScript in order to position a popup box beside

I currently have a table with a few records and I am looking to implement a feature where a popup box appears when the user hovers over a specific record.

The popup box has already been created and the message has been set. The only remaining task is to position the box (

<div id="popup"></div>

) so that it appears next to the element that triggers it.

To achieve this, I need to obtain the coordinates of the element that triggered the event. However, using this.offsetLeft gives me relative coordinates which are not helpful in my case because the element is inline.

Since I am using pure JavaScript for this project, I prefer solutions that do not involve jQuery. Any advice on how to accurately determine the location of the element would be greatly appreciated!

javascript location inline

Answer 1

Answer №1

const container = this.getBoundingClientRect();

alert( "Y position:" + container.top + "X position:"+ container.left );

Check out this JSFiddle link for more information.

If you need to factor in scrolling:

const body = document.body,
    html = document.documentElement,
    scrollTop = window.pageYOffset || html.scrollTop || body.scrollTop || 0,
    scrollLeft = window.pageXOffset || html.scrollLeft || body.scrollLeft || 0,

    box = this.getBoundingClientRect(),

    top = box.top + scrollTop,
    left = box.left + scrollLeft;

alert( "Adjusted Y position:" + top + "Adjusted X position:"+ left );

Answer 2

const container = this.getBoundingClientRect();

alert( "Y position:" + container.top + "X position:"+ container.left );

Check out this JSFiddle link for more information.

If you need to factor in scrolling:

const body = document.body,
    html = document.documentElement,
    scrollTop = window.pageYOffset || html.scrollTop || body.scrollTop || 0,
    scrollLeft = window.pageXOffset || html.scrollLeft || body.scrollLeft || 0,

    box = this.getBoundingClientRect(),

    top = box.top + scrollTop,
    left = box.left + scrollLeft;

alert( "Adjusted Y position:" + top + "Adjusted X position:"+ left );

Answer 3

Answer №2

If you want to find the element's position relative to the page, one approach is to recursively traverse through its offsetParents and add up their offsetLeft values.

Here's a sample function that demonstrates how this can be achieved:

function calculateOffsetLeftRelativeToPage(element) {
    var offset = element.offsetLeft;
    var offsetParent = element.offsetParent;
    if (offsetParent != null) {
        offset += calculateOffsetLeftRelativeToPage(offsetParent);
    }
    return offset;
}

var primaryElement = document.getElementById('primaryElement');
var secondaryElement = document.getElementById('secondaryElement');

primaryElement.onmouseover = function() {
    var offsetLeft = calculateOffsetLeftRelativeToPage(this);
    secondaryElement.style.left = offsetLeft + 'px';
}

Check out the JSFiddle demo for a practical illustration: jsfiddle.net/e6vWV/

Answer 4

If you want to find the element's position relative to the page, one approach is to recursively traverse through its offsetParents and add up their offsetLeft values.

Here's a sample function that demonstrates how this can be achieved:

function calculateOffsetLeftRelativeToPage(element) {
    var offset = element.offsetLeft;
    var offsetParent = element.offsetParent;
    if (offsetParent != null) {
        offset += calculateOffsetLeftRelativeToPage(offsetParent);
    }
    return offset;
}

var primaryElement = document.getElementById('primaryElement');
var secondaryElement = document.getElementById('secondaryElement');

primaryElement.onmouseover = function() {
    var offsetLeft = calculateOffsetLeftRelativeToPage(this);
    secondaryElement.style.left = offsetLeft + 'px';
}

Check out the JSFiddle demo for a practical illustration: jsfiddle.net/e6vWV/

Locate the X and Y coordinates of an inline element in JavaScript in order to position a popup box beside

Answer №1

Answer №2

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