How Can JavaScript Detect HTML Element Content Overflow, Even with `overflow: visible`?

Checking Content Overflow in HTML Elements Using JavaScript

When an HTML element's content exceeds its defined dimensions, it can result in overflow. While visible overflow can be checked using standard checks, checking for overflow with the "overflow: visible" property can pose a challenge.

JavaScript Solution

To account for this, a JavaScript function can be employed:

function checkOverflow(el) {
   var curOverflow = el.style.overflow;

   // If overflow is 'visible' or not set
   if (!curOverflow || curOverflow === "visible") {
      // Temporarily set overflow to 'hidden'
      el.style.overflow = "hidden";
   }

   var isOverflowing = el.clientWidth < el.scrollWidth ||
                       el.clientHeight < el.scrollHeight;

   // Restore original overflow style
   el.style.overflow = curOverflow;

   return isOverflowing;
}

Usage:

Pass the HTML element in question as a parameter to the checkOverflow function to determine if its content is overflowing. The function will return true if there is overflow, otherwise it will return false.

Compatibility:

This solution has been tested in Firefox 3 and 40, Internet Explorer 6, and Chrome 0.2.149.30.

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