/**
 * 獲取元素相對於指定容器的位置
 * Get the relative position of an element within a given container
 * @param {HTMLElement} element - 目標元素 (Target element)
 * @param {HTMLElement} container - 參考容器 (Reference container)
 * @returns {Object} - { left, top, height } 位置資訊 (Position details)
 */
export function getRelativePosition(element, container) {
    let nodeRect = element.getBoundingClientRect()
    let containerRect = container.getBoundingClientRect()

    return {
        left: nodeRect.left - containerRect.left,
        top: nodeRect.top - containerRect.top,
        height: nodeRect.height,
    }
}