Tips for creating overlapping scroll effects on elements

Question

Tips for creating overlapping scroll effects on elements

I'm currently working on a project that already has a complex front end. I need to incorporate a new element as a replacement for a dropdown menu. This new element is essentially a div connected to a collection using knockout.

The issue arises when there are multiple divs on a single page, each containing a dynamically rendered structure. Nestled within one of these divs is my custom dropdown. The problem occurs when attempting to expand the dropdown (triggered by a click event bound via jQuery) and it renders at the top of the div due to excessive content. Using overflow: visible would disrupt the overall appearance of the page.

An example illustrating my dilemma can be found HERE:

$('.show-dropdown').click(function() {
if ($(this).next('.render-this').hasClass('hide-me')) {
$(this).next('.render-this').removeClass('hide-me');
  } else {
  $(this).next('.render-this').addClass('hide-me');
  }

})

td {
  position: relative;
}

#top-div {
  width: 500px;
  max-width: 500px;
border: 1px solid black;
  max-height: 100px;
  overflow-y: auto;
white-space: nowrap;
}

#bottom-div {
  width: 500px;
  max-width: 500px;
border: 1px solid black;
  max-height: 100px;
    overflow-y: auto;

}

.show-dropdown {
  width: 120px;
  height: 40px;
  background-color: green;
}

.render-this {
  position: absolute;
  bottom: 10px;
  z-index: 5;
  width: 20px;
  height: 150px;
  background-color: red;
}
.hide-me {
  display: none;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="top-div">
<p>
lorem ipsum lorem ipsum lorem ipsum lorem ipsumlorem ipsumlorem ipsum lorem ipsum lorem ipsum
</p>
</div>
<div id="bottom-div">
<table class="w3-table">
<tr>
  <th>Column 1</th>
  <th>Column 2</th>
  <th>Column 3</th>
  <th>Column 4</th>
  <th>Column 5</th>
  <th>Column 6</th>
</tr>
<tr>
  <td><div class="show-dropdown"></div><div class="render-this hide-me"></div></td>
  <td><div class="show-dropdown"></div><div class="render-this hide-me"></div></td>
  <td><div class="show-dropdown"></div><div class="render-this hide-me"></div></td>
  <td><div class="show-dropdown"></div><div class="render-this hide-me"></div></td>
  <td><div class="show-dropdown">></div><div class="render-this hide-me"></div></td>
  <td><div class="show-dropdown"></div><div class="render-this hide-me"></div></td>
</tr>
</table>

After exploring various resources, it seems like having overflow may pose limitations. However, I came across a solution involving CSS properties such as transform and other techniques which might still offer some possibilities. My goal is to fully render the dropdown without compromising the layout, so I'm considering experimenting with overflow: visible in tandem with a JavaScript-powered scroll feature, but further research is required.

javascript jquery html css

Answer 1

Answer №1

Unique Content

https://example.com/code123

(I trust this meets your expectations)

Explanation of the Solution

To overcome the limitations of not being able to use both overflow-x: auto and overflow-y: visible together, a workaround is implemented as described below:

The red div cannot pop out if the parent has position: relative. This property is removed.
Removing the bottom property from the relative element ensures proper alignment.
By setting all positioning properties to auto, the elements are positioned similarly to static placement but with the added functionality of popping out of the bottom box.
Utilizing
```
translateY(calc(100% + 10px) * -1)
```
moves the red box 10px above the green box.
To ensure the red box scrolls along with its parent, JavaScript calculates scroll positions and updates CSS variables for smooth repositioning.
Using --scroll-left CSS variable in conjunction with
```
translateX(calc(var(--scroll-left,0px) * -1))
```
resolves scrolling issues.
Avoiding horizontal overflow is achieved through
```
clip-path: inset(-999px 0px -999px 0px)
```
.
Ultimately, the desired outcome is successfully accomplished.

Drawbacks:

Firefox may experience lag during horizontal repositioning due to Scroll Linked Effects, potentially impacting mobile browser performance as well.

Additional Resources

https://example.com/popping-overflow-fix/ Serving as inspiration, the provided solution maintains a similar core approach while offering unique strategies.

Answer 2

Unique Content

https://example.com/code123

(I trust this meets your expectations)

Explanation of the Solution

To overcome the limitations of not being able to use both overflow-x: auto and overflow-y: visible together, a workaround is implemented as described below:

The red div cannot pop out if the parent has position: relative. This property is removed.
Removing the bottom property from the relative element ensures proper alignment.
By setting all positioning properties to auto, the elements are positioned similarly to static placement but with the added functionality of popping out of the bottom box.
Utilizing
```
translateY(calc(100% + 10px) * -1)
```
moves the red box 10px above the green box.
To ensure the red box scrolls along with its parent, JavaScript calculates scroll positions and updates CSS variables for smooth repositioning.
Using --scroll-left CSS variable in conjunction with
```
translateX(calc(var(--scroll-left,0px) * -1))
```
resolves scrolling issues.
Avoiding horizontal overflow is achieved through
```
clip-path: inset(-999px 0px -999px 0px)
```
.
Ultimately, the desired outcome is successfully accomplished.

Drawbacks:

Firefox may experience lag during horizontal repositioning due to Scroll Linked Effects, potentially impacting mobile browser performance as well.

Additional Resources

https://example.com/popping-overflow-fix/ Serving as inspiration, the provided solution maintains a similar core approach while offering unique strategies.

Answer 3

Answer №2

If you want to create a dropdown that is absolute positioned within a scrollable container, you can achieve this by adding a wrapper div with a relative position around the scrollable element. The absolute positioned dropdown will then bind to this wrapper element. You can view an example of this setup here.

CSS:

.position-relative {
    position: relative;
}

#top-div {
    width: 500px;
    max-width: 500px;
    border: 1px solid black;
    max-height: 100px;
    overflow-y: auto;
    white-space: nowrap;
}

#bottom-div {
    width: 500px;
    max-width: 500px;
    border: 1px solid black;
    max-height: 100px;
    overflow-y: auto;

}

.show-dropdown {
    width: 120px;
    height: 40px;
    background-color: green;
}

.render-this {
    position: absolute;
    bottom: 10px;
    z-index: 5;
    width: 20px;
    height: 150px;
    background-color: red;
}
.hide-me {
    display: none;
}

HTML:

<div class="position-relative">
    <div id="bottom-div">
        <table class="w3-table">
            <tr>
                <th>Column 1</th>
                <th>Column 2</th>
                <th>Column 3</th>
                <th>Column 4</th>
                <th>Column 5</th>
                <th>Column 6</th>
            </tr>
            <tr>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown">></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
            </tr>
        </table>
    </div>
</div>

JavaScript:

$('.show-dropdown').click(function() {
    if ($(this).next('.render-this').hasClass('hide-me')) {
        $(this).next('.render-this').removeClass('hide-me');
    } else {
        $(this).next('.render-this').addClass('hide-me');
    }
})

You have the flexibility to adjust the top, left, right, and bottom properties of the dropdown as needed.

Answer 4

If you want to create a dropdown that is absolute positioned within a scrollable container, you can achieve this by adding a wrapper div with a relative position around the scrollable element. The absolute positioned dropdown will then bind to this wrapper element. You can view an example of this setup here.

CSS:

.position-relative {
    position: relative;
}

#top-div {
    width: 500px;
    max-width: 500px;
    border: 1px solid black;
    max-height: 100px;
    overflow-y: auto;
    white-space: nowrap;
}

#bottom-div {
    width: 500px;
    max-width: 500px;
    border: 1px solid black;
    max-height: 100px;
    overflow-y: auto;

}

.show-dropdown {
    width: 120px;
    height: 40px;
    background-color: green;
}

.render-this {
    position: absolute;
    bottom: 10px;
    z-index: 5;
    width: 20px;
    height: 150px;
    background-color: red;
}
.hide-me {
    display: none;
}

HTML:

<div class="position-relative">
    <div id="bottom-div">
        <table class="w3-table">
            <tr>
                <th>Column 1</th>
                <th>Column 2</th>
                <th>Column 3</th>
                <th>Column 4</th>
                <th>Column 5</th>
                <th>Column 6</th>
            </tr>
            <tr>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown">></div>
                    <div class="render-this hide-me"></div>
                </td>
                <td>
                    <div class="show-dropdown"></div>
                    <div class="render-this hide-me"></div>
                </td>
            </tr>
        </table>
    </div>
</div>

JavaScript:

$('.show-dropdown').click(function() {
    if ($(this).next('.render-this').hasClass('hide-me')) {
        $(this).next('.render-this').removeClass('hide-me');
    } else {
        $(this).next('.render-this').addClass('hide-me');
    }
})

You have the flexibility to adjust the top, left, right, and bottom properties of the dropdown as needed.

Answer 5

Answer №3

To achieve the desired result, make the following adjustments to your CSS:

Remove the position:relative; from the td element.
Instead of using position: relative;, employ a different method to expand the #bottom-div to fit its content such as display: table;. Remember to add position: relative; to it.
All other CSS rules can remain unchanged.

Below is the updated CSS code:

#top-div {
  width: 500px;
  max-width: 500px;
  border: 1px solid black;
  max-height: 100px;
  overflow-y: auto;
  white-space: nowrap;
}

#bottom-div {
  width: 500px;
  max-width: 500px;
  border: 1px solid black;
  max-height: 100px;
  position: relative;
  display: table;
}

.show-dropdown {
  width: 120px;
  height: 40px;
  background-color: green;
}

.render-this {
  position: absolute;
  bottom: 10px;
  z-index: 5;
  width: 20px;
  height: 150px;
  background-color: red;
}

.hide-me {
  display: none;
}

You can view the updated CSS in this Fiddle.

Answer 6

To achieve the desired result, make the following adjustments to your CSS:

Remove the position:relative; from the td element.
Instead of using position: relative;, employ a different method to expand the #bottom-div to fit its content such as display: table;. Remember to add position: relative; to it.
All other CSS rules can remain unchanged.

Below is the updated CSS code:

#top-div {
  width: 500px;
  max-width: 500px;
  border: 1px solid black;
  max-height: 100px;
  overflow-y: auto;
  white-space: nowrap;
}

#bottom-div {
  width: 500px;
  max-width: 500px;
  border: 1px solid black;
  max-height: 100px;
  position: relative;
  display: table;
}

.show-dropdown {
  width: 120px;
  height: 40px;
  background-color: green;
}

.render-this {
  position: absolute;
  bottom: 10px;
  z-index: 5;
  width: 20px;
  height: 150px;
  background-color: red;
}

.hide-me {
  display: none;
}

You can view the updated CSS in this Fiddle.

Tips for creating overlapping scroll effects on elements

Answer №1

Unique Content

Explanation of the Solution

Drawbacks:

Additional Resources

Answer №2

Answer №3

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