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18 lines
545 B
18 lines
545 B
export function getWindowScrollTop(win) {
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let scrollTop = 0
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// 获取父窗口滚动偏移
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if (win.document.documentElement && win.document.documentElement.scrollTop) {
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scrollTop = win.document.documentElement.scrollTop
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} else if (win.document.body) {
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scrollTop = win.document.body.scrollTop
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}
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// 如果嵌套在 iframe 中，计算 iframe 的位置
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if (win.frameElement) {
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const iframeRect = win.frameElement.getBoundingClientRect()
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scrollTop += iframeRect.top // 加上 iframe 在父窗口中的偏移
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}
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return scrollTop
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}
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