Is there a method to obtain the bounding box coordinates of a DOM element using JavaScript?
I could theoretically derive it from various CSS properties like width, height, and others.
The reason for my inquiry is that some other graphical platforms offer this functionality as a built-in feature. For example, XUL apparently allows this through a method called getBoundingClientRect() as mentioned in this post.
(My intention is to determine if two elements overlap.)
Did you know there is a handy built-in method to retrieve the bounding rectangle of an element? Check out Element.getBoundingClientRect
This method will provide you with the visual top, right, bottom, and left coordinates of the element, as well as its width and height.
For an example, take a look at this JSFiddle demonstration
To learn more, visit:
If, hypothetically, the ID of your DOM element happened to be myElement, you can utilize the following code snippets:
document.getElementById("myElement").offsetLeft; //Returns the left side of the box
document.getElementById("myElement").offsetTop; //Returns the top side of the box
document.getElementById("myElement").offsetLeft + document.getElementById("myElement").offsetWidth; //Calculates the right side of the box
document.getElementById("myElement").offsetTop + document.getElementById("myElement").offsetHeight; //Determines the bottom side of the box
The logic behind determining the bottom and right sides involves adding the width or height of the bounding box to the left or top side respectively.
To streamline the process, consider defining
document.getElementById("myElement")var myElement = document.getElementById("myElement");
myElement.offsetLeft; //Obtains the left side of the box
myElement.offsetTop; //Fetches the top side of the box
myElement.offsetLeft + myElement.offsetWidth; //Estimates the right side of the box
myElement.offsetTop + myElement.offsetHeight; //Derives the bottom side of the box
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