Is it possible to detect when a user hovers over a specific area within a div using JavaScript or jQuery, without adding any additional tags?
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I understand how to do this with additional tags, but I am curious if there is a better option using only JavaScript.
To add an event handler in JavaScript, you don't need any extra tags. For instance, if you have a DIV element like the following:
<div id="xdiv" style="width:100px; height:100px; border:solid 1px black" />
You can attach the onmousemove event using pure JavaScript as shown below:
document.getElementById("xdiv").onmousemove = function(e) {
var evt = e || event;
if (this.offsetWidth - evt.offsetX > 10) {
this.style.backgroundColor = "red";
} else {
this.style.backgroundColor = "green";
}
}
This code will change the background color of the DIV to green when the mouse is moved within 10 pixels from the right side. Otherwise, it will change to red.
Check out the live demo here: http://jsfiddle.net/25SXW/3/
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