Implement the scenario utility: DOM offset absolute coordinate. Discuss edge cases, runtime performance, and alternative paradigms.
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Example usage
function getAbsoluteOffset(el) {
if (!el) return { top: 0, left: 0 };
// Bounding client rect returns exact position relative to viewport
const rect = el.getBoundingClientRect();
const scrollLeft = window.pageXOffset || document.documentElement.scrollLeft;
const scrollTop = window.pageYOffset || document.documentElement.scrollTop;
return {
top: rect.top + scrollTop,
left: rect.left + scrollLeft
};
}
// Example placeholder (requires DOM environment)
// console.log(getAbsoluteOffset(document.getElementById('target')));05
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