How deeply does CSS in Depth, Second Edition cover auto-fill?

Explains repeat(), minmax(), track limits, viewport changes, and empty tracks through a concrete portfolio grid.

Auto-fill

As explained in CSS in Depth, Second Edition

The CSS auto-fill keyword makes a repeat() track definition create as many tracks as fit within the available space and specified size constraints.

In CSS Grid, auto-fill tells repeat() to create as many tracks as fit the available space while respecting the supplied size constraints. Combined with minmax(200px, 1fr), it keeps columns at least 200px wide and adds fewer or more columns as the viewport changes. section 5.4

Responsive portfolio grid

Use grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));. A viewport wide enough for four 200px columns gets four tracks; a narrower viewport gets fewer. Wider space can create more. auto-fill may also leave empty tracks when too few grid items exist. section 5.4

How CSS in Depth, Second Edition covers it

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Also explained in

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Math for Web Designauto-fill is a CSS Grid repeat() keyword that creates as many tracks as can fit the available grid space, retaining empty tracks.

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Related concepts

auto-fitalternative to · A CSS Grid repeat() keyword that creates as many repeated tracks as fit within the available space and collapses empty tracks.
CSS Gridused by · CSS Grid is a CSS layout system for arranging elements in two-dimensional rows and columns.
repeat()used by · The CSS repeat() function specifies a repeated sequence of grid track sizes or patterns, using a fixed or automatically determined repetition count.
grid trackconfigures · A grid track is the space between two adjacent grid lines, forming a row or column in a CSS Grid layout.
floor()uses · floor() is a CSS math function that rounds a numeric value down to the nearest integer.

This explainer was generated by Manning's knowledge graph from the text of CSS in Depth, Second Edition. The section links point to the parts of the book it draws on.