Tips for adjusting the width of an HTML element that is set to position: fixed

<div class="ui-datatable-scrollable-view" style="
    width: 100%;
    position: relative;
">
        <div class="ui-widget-header ui-datatable-scrollable-header" style="position:fixed;top:50px">
         
        </div>
    </div>

I am facing an issue with a div element that is supposed to stick to the top of the page. I have applied CSS styles as shown below:

width: 100%;
  position: fixed;
  z-index: 2;

However, the element is not taking up the full width as intended.

I have tried various approaches to resolve this problem. One attempt was setting the parent div's position as relative, but it did not yield the desired outcome;

It seems like the element is inheriting the width from the screen size. I attempted to manually set a fixed width to match the required size, but encountered issues when the screen size changed. Ideally, I want the element to adapt its width based on its parent container.

htmlcss

Answer №1

After experimenting with your CSS, I discovered that it functions perfectly for my needs.

Code Snippet:

<div class="wrapper"></div>

CSS Styling:

.wrapper {
 width: 100%;
 height: 100px;
 position: fixed;
 z-index: 2;
 background-color: black;
}

Make sure to confirm that both your html and body elements have a width of 100%

For further reference, you can view the code on CodePen: https://codepen.io/athapliyal/pen/VzqyBX

Answer №2

#test {
  width: 100vw;
  position: fixed;
  z-index: 2;
  height: 50px;
  background-color: blue;
}
<div id="test">

When setting the width as a percentage, it is relative to the parent of the div. If you want it to work, you need to define the parent with a width of 100%. For a better understanding, we would require more code.

Alternatively, you can set the width using 100vw, where1vw equals 1% of viewport (window) width.

This approach makes the width relative to the viewport and independent of the parent element's dimensions.

As for the height, you can use: vh (Viewport height)

Answer №3

It is my belief that the width attribute is actually set to 100%. The reason why it may seem invisible is due to the absence of a specified height.

Here is an example using HTML:

<div class="wrapper">
    <div class="content"></div>
</div>

And here is how it can be styled with CSS:

.wrapper {
  width: 800px;
  background-color: grey;
  height: 600px;
}

.content {
  position: fixed;
  background-color: blue;
  width: inherit;
  height: 100px;
}

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