如何構建具有固定后頁和窗口滾動而不是div的html模式

Question

我正在嘗試實現一種模式（在頁面上覆蓋），其中后台的Page恰好位於實際滾動位置，但不滾動，而前台有一種模式，即當窗口元素滾動時正在滾動。

因此，“舊”頁面應像主體的固定背景一樣位於模式的后面，並且模式應像普通頁面一樣滾動。

由於我正在使用反應式Web框架（流星），因此尚不清楚當時顯示的內容，也顯示了模態。

如果可以避免頁面中間的水平移動，則在顯示或隱藏滾動條時會很酷。

我的實際html是這樣的：

當顯示模態時， .page-content應該固定在適當的位置並滾動位置（因此，當我向上滾動時，“視口”應保持不變，（以及.modal-background ，基本上是灰度平面，而.modal-inner應該與頁面一起正常滾動。

理想情況下，模態的顯示/隱藏應通過設置display:block或display:none來解決。modal-container或給.page .page-contents一個附加類。

Answer 1

像這樣嗎？

 body{position:fixed;top:0px;background-image: url('http://lorempixel.com/output/fashion-qc-1560-883-1.jpg'); } #innerDiv{background-color:grey;width:90%;height:900px;position:relative;left:40px;top:20px;} #modal{width:85%;max-height:400px;z-index:3;position:relative;top:20px;left:30px;overflow-y:scroll;} 

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