Is it feasible to achieve a full 100% screen width within a confined div using relative positioning?

Question

Is it feasible to achieve a full 100% screen width within a confined div using relative positioning?

Can a div expand to 100vw within a parent div that is relative and has a limited width, without losing its height in the document like it would if positioned absolute?

Is it achievable with pure CSS or do I need some jQuery or JS?

body {
  background: #f0f0f0;
  text-align: center;
}

.parent {
  max-width: 300px;
  height: 300px;
  margin: auto;
  position: relative;
  background: white;
}

p {
  padding: 20px;
}

#banner {
  padding: 20px;
  background: black;
  color: white;
}

<div class="parent">
  <p>My relative parent container,<br>with a fixed width.</p>
  <div id="banner">
    My full width banner
  </div>
  <p>...</p>
</div>

Has anyone successfully implemented this? Any tips or guidance would be greatly appreciated. Thank you!

javascript jquery css responsive-design

Answer 1

Answer №1

A solution to centering an element with 100vw width is to add margin-left: calc(-50vw + 50%);. This will effectively move the element halfway to the left of the screen width and then back 50% of its own width to the right, achieving a "centered" look. Here's an example of CSS code:

body {
  background: #f0f0f0;
  text-align: center;
}

.parent {
  max-width: 300px;
  height: 300px;
  margin: auto;
  position: relative;
  background: white;
}

p {
  padding: 20px;
}

#banner {
  padding: 20px;
  background: black;
  color: white;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
}

<div class="parent">
  <p>My relative parent container,<br>with a fixed width.</p>
  <div id="banner">
    My full width banner
  </div>
  <p>...</p>
</div>

One issue that may arise is when the content exceeds the window height, resulting in a horizontal scrollbar. This challenge was previously discussed in this question, but a definitive solution has not yet been found.

Answer 2

A solution to centering an element with 100vw width is to add margin-left: calc(-50vw + 50%);. This will effectively move the element halfway to the left of the screen width and then back 50% of its own width to the right, achieving a "centered" look. Here's an example of CSS code:

body {
  background: #f0f0f0;
  text-align: center;
}

.parent {
  max-width: 300px;
  height: 300px;
  margin: auto;
  position: relative;
  background: white;
}

p {
  padding: 20px;
}

#banner {
  padding: 20px;
  background: black;
  color: white;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
}

<div class="parent">
  <p>My relative parent container,<br>with a fixed width.</p>
  <div id="banner">
    My full width banner
  </div>
  <p>...</p>
</div>

One issue that may arise is when the content exceeds the window height, resulting in a horizontal scrollbar. This challenge was previously discussed in this question, but a definitive solution has not yet been found.

Answer 3

Answer №2

To achieve this, I apply the CSS properties relative, margin, left, and right.

body {
  background: #f0f0f0;
  text-align: center;
  overflow: hidden;
}

.parent {
  max-width: 300px;
  height: 300px;
  margin: auto;
  position: relative;
  background: white;
}

p {
  padding: 20px;
}

#banner {
  padding: 20px;
  background: black;
  color: white;
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

<div class="parent">
  <p>My relative parent container,<br>with a fixed width.</p>
  <div id="banner">
    My full width banner
  </div>
  <p>...</p>
</div>

Reference

Answer 4

To achieve this, I apply the CSS properties relative, margin, left, and right.

body {
  background: #f0f0f0;
  text-align: center;
  overflow: hidden;
}

.parent {
  max-width: 300px;
  height: 300px;
  margin: auto;
  position: relative;
  background: white;
}

p {
  padding: 20px;
}

#banner {
  padding: 20px;
  background: black;
  color: white;
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
}

<div class="parent">
  <p>My relative parent container,<br>with a fixed width.</p>
  <div id="banner">
    My full width banner
  </div>
  <p>...</p>
</div>

Reference

Is it feasible to achieve a full 100% screen width within a confined div using relative positioning?

Answer №1

Answer №2

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