嵌套可折叠的可见性问题

Question

`每当我展开嵌套的可折叠项时，其父级的可见性都不会正确计算。屏幕上遗漏了一些嵌套的内容这是处理滚动高度的html代码和js代码//Getallcollapsiblebuttonsconstcollapsibles=document.getElementsByClassName('collapsible');//Addclickeventlistenerforeachcollapsiblefor(l

P粉426906369 · Answer

我已经修改了您的代码，以便能够在动态高度和响应能力下正常工作。

先检查一下您是否正在展开或折叠。我们可以通过获取 classList.toggle 的结果来弄清楚这一点，如果添加了类，则为 true，如果删除，则为 false。 p>

我在每个 ContributionContent 内部添加了一个包装器。该包装器将负责计算内部内容的总高度。这是必需的，因为 ContributionContent 的高度会波动。

监听 transitionend 事件，将最大高度设置为 none。仅当手风琴展开时才设置高度。关闭 0px 时应予以尊重。

由于展开时最大高度设置为none，因此我们必须使用双请求动画帧（Double RAF）才能首先设置高度，然后过渡到0px关闭时。这是一种在渲染发生后执行任务的（hacky）技术。请参阅有关 Double RAF 的此帖子。




// Get all collapsible buttons
const collapsibles = document.querySelectorAll('.collapsible');

// Add click event listener for each collapsible.
for (const collapsible of collapsibles) {
  collapsible.addEventListener('click', function(event) {
    const button = event.target;
    const isExpanding = button.classList.toggle('active');
    const content = button.nextElementSibling;
    const wrapper = content.firstElementChild;
    
    // Get the calculated height of the wrapper.
    const { height } = wrapper.getBoundingClientRect();
    content.style.maxHeight = height + 'px';
    
    // Remove max height after an exapnding transition.
    content.addEventListener('transitionend', () => {
      if (isExpanding) {
        content.style.maxHeight = 'none';
      }
    }, { once: true });
    
    // Hack to force a closing transition.
    if (!isExpanding) {
      requestAnimationFrame(() => {
        requestAnimationFrame(() => {
          content.style.maxHeight = '0px';
        });
      });
    }
  });
}
.active {
  color: blue;
}

.collapsible + * {
  display: grid; /* This forces the wrapper to account for the margins. It avoids a jump. */
  overflow: hidden;
  transition: max-height 500ms ease-out;
}

  
    

      
        Fantastic League
      
      
        
      
      
        A 2D Top Down Shooter game which heavily focuses on Enemy AI. I have made an attempt to build this project from ground up. I have used SFML for rendering shapes and textures, the rest is made from scratch. The project involves the integration
          of complex enemy AI. A simple Data-Oriented Design approach has been followed in this project for handling different events and messages by the enemies. 
      

      
        
        
          
            Got a lot of contribution
            
            
              
              
                
                  1. This process involves the development and integration of states like Game Menu, Splash Screen, InGame, Game Over etc states. These states are fetched with delta time which is calculated from the Game Loop.  2. This stage also includes
                    the development of Asset Manager, Input Manager etc
                
              
            

            
              
              
                
                  1. This process involves the development and integration of states like Game Menu, Splash Screen, InGame, Game Over etc states. These states are fetched with delta time which is calculated from the Game Loop.  2. This stage also includes
                    the development of Asset Manager, Input Manager etc
                
              
            

            
              
              
                
                  1. This process involves the development and integration of states like Game Menu, Splash Screen, InGame, Game Over etc states. These states are fetched with delta time which is calculated from the Game Loop.  2. This stage also includes
                    the development of Asset Manager, Input Manager etc
                
              
            

          
        
      

    

  




作为结束语。 W3Schools 有很多很好的例子，但众所周知它们已经过时了。寻找示例时，请了解他们的年龄以及他们是否使用最新的做法。

嵌套可折叠的可见性问题

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Fantastic League