How to ensure an absolutely positioned div spans the entire width of the screen

I am facing an issue with an absolutely positioned div that I want to stretch the full width of the screen using 100vw. However, the problem is that it aligns with its parent's starting point rather than the left side of the viewport. How can I make sure the element starts from left to right?

.main-navigation li {
    float: left;
    position: relative;
    height: 100%;
    display: flex;
}
.nav-dropdown {
    display: none;
    left: 0;
    top: 50px;
    position: absolute;
    background-color: #ebebeb;
    z-index: 2;
    height: 300px;
}
<li id="menu-item-120" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-120">
  <a class="nav-titles" href="http://localhost/wp/checkout/">Clothes</a>
  <div class="nav-dropdown"></div>
</li>

E: Here is the code snippet. The specific div in question is referred to as .nav-dropdown.

htmlcsscss-positionabsolute

Answer №1

If you want an element set to position:absolute to align properly, ensure that the parent has position:relative. By removing relative positioning from the li tag and applying it to the parent body tag, the desired behavior can be achieved! See the code snippet below for reference.

html, body{
  height:auto;
  margin:0px;
  width:100%;
  position: relative;
}
.main-navigation li {
    float: left;
    height: 100%;
    display: flex;
}
.nav-dropdown {
    /*display: none;*/
    left: 0;
    top: 50px;
    position: absolute;
    background-color: #ebebeb;
    z-index: 2;
    width:100%;
    height: 300px;
}
<li id="menu-item-120" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-has-children menu-item-120">
  <a class="nav-titles" href="http://localhost/wp/checkout/">Clothes</a>
  <div class="nav-dropdown"></div>
</li>
Lorem ipsum dolor sit amet, consectetur adipiscing elit... (Additional content removed for brevity)

Answer №2

Objects containing the attribute position: absolute are consistently placed against their immediate parent with a non-static position. If aiming to align them against the viewpoint, consider utilizing position: fixed instead.

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