How to create a flex container that allows vertical scrolling without specifying its height?

Question

In the code snippet below, I expect the first and second containers to each occupy 50% of the window height, and I want the first container body to have vertical overflow. Unfortunately, when I put the huge block into the When in a container - it becomes larger than 50% of the page and auto-overflow does not work. Is there any way to not specify the height? *{margin:0;box-sizing:border-box;}.root{height:100vh;display:flex;flex-direction:column

P粉391677921 · Answer

You have to wrap the block content in a div and set overflow-y to scroll in order to mark the entire block content as scrolling, otherwise only the middle part will scroll.

And add overflow-y: auto; to the block itself to set it to scroll.

Try this:

* {
  margin: 0;
  box-sizing: border-box;
}

.root {
  height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
}

.block-content-wrapper {
  overflow-y: scroll;
}

.first-block,
.second-block {
  flex: 1;
  background-color: aqua;
  border: 1px solid gray;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.first-block-header {
  height: 100px;
  background-color: yellow;
}

.first-block-footer {
  height: 100px;
  background-color: coral;
}

.first-block-body {
  flex: 1;
  overflow: auto;
  padding: 16px;
}

.first-block-content {
  height: 700px;
  width: 50px;
  background-color: purple;
}





  
  
  Problem with overflow

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