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// @ts-nocheck
const isOverflowHidden = el => getComputedStyle(el, 'overflow') === 'hidden'
const getComputedStyle = (el, property) => {
const computedStyle = window.getComputedStyle
? document.defaultView.getComputedStyle(el, null)
: el.currentStyle
return property ? computedStyle[property] : computedStyle
}
const isOnDocument = el => {
while ((el = el.parentNode)) {
if (el === document) return true
}
return false
}
const isVisibleDueToOverflow = el => {
const elPositioning = getPositioning(el.getBoundingClientRect())
while ((el = el.parentNode)) {
Iif (el.nodeType !== 9 && isOverflowHidden(el)) {
const parentElPositioning = getPositioning(el.getBoundingClientRect())
const isElInsideParentRectX =
elPositioning.startX >= parentElPositioning.startX &&
elPositioning.endX <= parentElPositioning.endX
const isElInsideParentRectY =
elPositioning.startY >= parentElPositioning.startY &&
elPositioning.endY <= parentElPositioning.endY
if (!isElInsideParentRectX || !isElInsideParentRectY) return false
}
}
return true
}
const getPositioning = ({ x, width, y, height }) => ({
startX: parseInt(x),
endX: parseInt(x) + parseInt(width),
startY: parseInt(y),
endY: parseInt(y) + parseInt(height),
})
/**
* 检查 HTML 元素是否可见。
*
* @param el 要检查的 HTML 元素
*/
export function isElementVisible(el: HTMLElement): boolean {
if (!isOnDocument(el)) return false
const isHiddenDueToOpacity = getComputedStyle(el, 'opacity') === '0'
const isHiddenDueToDisplay = getComputedStyle(el, 'display') === 'none'
const isHiddenDueToVisibility =
getComputedStyle(el, 'visibility') === 'hidden'
if (isHiddenDueToOpacity || isHiddenDueToDisplay || isHiddenDueToVisibility)
return false
return isVisibleDueToOverflow(el)
}
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