How to Fill Remaining Container Width with CSS Using `calc`?

Filling Remaining Container Width with CSS

The objective is to maximize the width of an element named 'middle' within a container div, allowing it to occupy the remaining space after accommodating other elements.

Solution:

Utilizing the CSS property 'calc' is the key to achieving this. By calculating the available width and subtracting the fixed width of other elements, we can dynamically determine the remaining width.

<code class="css">#middle {
  display: inline-block;
  width: calc(100% - <fixed-element-width>);
}</code>

In the example provided:

<code class="html"><div class="left">100 px wide!</div><div class="right">Fills width!</div></code>

And CSS:

<code class="css">.left {
  width: 100px;
}
.right {
  width: calc(100% - 100px);
}</code>

The red element has a fixed width of 100px, while the blue element fills the remaining space after accounting for the fixed width.

As an alternative to leaving no space between the elements, you can set font-size: 0 on the outer container element.

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