How to achieve cascading effect of elements in HTML?
P粉486138196
P粉486138196 2023-08-28 16:39:50
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<p>I wanted to make a custom tooltip for this element, but it's contained within a box that doesn't have enough room to display the tooltip, so it just gets cropped (actually I can scroll to It's showing because <code>overflow</code> is set to <code>auto</code>, but I want it to be visible without scrolling). Is there a way to make it display beyond the bounds? I've tried using <code>z-index</code> but that didn't work. </p> <p>This is what I said:</p> <p> <pre class="brush:css;toolbar:false;">.box { width: 100px; height: 100px; overflow: auto; border-style: solid; border-color: red; } .tooltip{ padding-top: 20px; position: relative; display: inline-block; } .tooltip .tooltiptext { display: none; max-width: 60vw; min-width: 15vw; background-color: white; border-style: solid; border-color: #1a7bd9; position: absolute; z-index: 1000000; } .tooltip:hover .tooltiptext { display: block; }</pre> <pre class="brush:html;toolbar:false;"><div class='box'> <div class='tooltip'> Display tooltip on mouse hover <div class='tooltiptext'> Wow, this is awesome, this is an epic tooltip text </div> </div> </div></pre> </p> <p>EDIT: The important thing is that hovering works on the element, not the box it's in. </p>
P粉486138196
P粉486138196

reply all(2)
P粉926174288

One way to do this is to create a ::before pseudo-element above and next to the hovered text.

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

.box {
  width: 100px;
  height: 100px;
  padding-top: 20px;
  border-style: solid;
  border-color: red;
}

.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip::before {
  content: "哇,这太棒了,这是一个史诗般的工具提示文本";
  position: absolute;
  left: 25%;
  bottom: -75%;
  display: none;
  width: 500px;
  background-color: white;
  border: 2px solid pink;
}

.tooltip:hover::before {
  display: flex;
}
<div class='box'>
  <div class='tooltip'>
    鼠标悬停查看工具提示
  </div>
</div>
P粉982881583

There are many ways to do this, but if you just want the tooltip to be visible outside the container, you don't need to use z-index or overflow. You just need to move the tooltip into a positioning context inside the relative container.

Based on your comments, since you want the tooltip to only appear when hovering over the text, I would recommend that your relative container wrap exactly what you want to hover. To illustrate this, I added a border to the outer frame, compared to where you decide to use a relative container.

Then just change box:hover to relative-container:hover to target the correct element.

I tried to organize the HTML and class names to be more semantic and concise for illustration. Hope this helps!

Example

.box {
  padding: 30px;
  border: blue solid;
  width: 300px;
  display: flex;
  align-items: center;
}

.relative-container {
  position: relative;
}

.box-content {
  border-style: solid;
  border-color: red;
  padding: 10px;
}

.tooltip {
  position: absolute;
  left: 0;
  top: 0;
  max-width: 60vw;
  min-width: 15vw;
  background-color: white;
  border: #1a7bd9 solid;
  display: none;
}

.relative-container:hover .tooltip {
  display: block;
  cursor: pointer;
}
<div class='box'>
  <div class='relative-container'>
    <div class='box-content'>
      Hover for tooltip. I have a little padding to give the text some room.
    </div>
    <div class='tooltip'>
    Wow, this is amazing, such an epic tooltip text. I'm aligned with the top of the box content containing text and take up the full width. I only appear when hovering over the box content (red outline), not the surrounding container (blue outline).
    </div>
  </div>
</div>
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