How Can I Achieve 100% Child Element Height Within a Variable-Height Parent?

Achieving 100% Child Height in a Varying Parent

In a multi-column layout, ensuring the navigation column aligns vertically with the main content is crucial. However, without specifying the parent's height, this can prove challenging.

Solution:

Employ the flex display property on the parent element. This allows children to flex and expand vertically, occupying the parent's height.

.parent {
  display: flex;
}

Additional Properties:

• align-items: stretch; sets the child elements to stretch vertically within the parent.
• flex-direction: column; aligns the child elements vertically (default value).

Example:

.parent {
  display: flex;
  align-items: stretch;
}

.child {
  height: 100%;
  width: 50%;
}

Note:

• Prefixes for cross-browser compatibility are recommended.
• Ensuring that the parent element has some height is crucial for proper vertical alignment.

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