假设您的 ionic React 页面中有一些文本非常大，因此您希望它滚动而不是填充整个页面，那么以下样式将有很大帮助：

Some Text

但是我们假设，我有一个包含一些内容和页脚的页面，例如像这样：

      
        
Search Detail Page
        
          Some Search Result Details
        

        
 Description
        

          
This is the content that matters to me. I want this to scroll when this description gets so long, that the footer would start covering it
          
Now let's put a whole lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: Now let's put a lot of text in this paragraph so we can demonstrate what happens if we have a long text. Repeat after me: 
        
      

      
        
          Some shiny footer content
        
      
    

在手机上，它看起来像这样：

请注意，描述内容不可滚动，因为 dev 的高度不受限制。问题是，我们需要定义一个“最大高度”，但我们不能这样做，因为页面大小会因不同设备而异，而且它取决于页脚高度。

有什么建议吗？这似乎是一个常见问题，但我找不到答案。

我尝试过这个：

  useEffect(() => {
    setTimeout(() => {
      const h2Height = document.querySelector('h2').clientHeight;
      const itemHeight = document.querySelector('ion-item').clientHeight;

      console.log('Header Height:', h2Height); // sadly, this is 0 at init time. But then works on reload
      console.log('Item Height:', itemHeight);


      if (descriptionRef.current) {
        descriptionRef.current.style.height = `calc(100% - ${h2Height + itemHeight}px - 2em)`;
      }
    }, 100); // we need this 100ms timeout, since otherwise the heights are not available and equals 0 at load time
  }, []);

//...
 Description
Some very long detailed description

这仅在我重新加载页面时有效，因为在第一次加载时，h2Heigth 和 itemHeight 都显示为 0