

s are set to display: inline-block to allow margin to be applied.s, like fieldsets, have also been restyled to be displayed as a heading of sorts.s have no borders, padding, or margin so they can be easily used as wrappers for individual inputs or groups of inputs.Here are some of the most notable changes: Various form elements have been rebooted for simpler base styles. This is an example table, and this is its caption to describe the contents. HeadingĪll lists-, , and -have their margin-top removed and a margin-bottom: 1rem. 5rem added and paragraphs margin-bottom: 1rem for easy spacing. Headings and paragraphsĪll heading elements-e.g., -and are reset to have their margin-top removed.
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To switch the global font-family, update $font-family-base and recompile Bootstrap. $font-family-sans-serif : // Safari for OS X and iOS (San Francisco) -apple-system, // Chrome and automatically inherited globally throughout Bootstrap. Read more about native font stacks in this Smashing Magazine article. The default web fonts (Helvetica Neue, Helvetica, and Arial) have been dropped in Bootstrap 4 and replaced with a “native font stack” for optimum text rendering on every device and OS.

Keep declarations of font-related properties to a minimum, using inherit whenever possible.For easier scaling across device sizes, block elements should use rems for margins.More importantly though, a single direction of margin is a simpler mental model.

Vertical margins can collapse, yielding unexpected results.
