[thetaPC]

Issue number: resolves internal

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What is the current behavior?

md buttons use values carried over from v9 instead of Material Design 2: 15.4px padding, 0.06em tracking, a 2px outline in the button's color, a 0.5 fade when disabled, and the same elevation on hover and focus as at rest.

What is the new behavior?

md buttons follow Material Design 2, using the values from Material Components Web 14, Google's MD2 implementation:

• 16px padding and a 64px min width at the default size, and 0.0893em letter spacing
• 18px icons with an 8px gap to the label, scaled at the small and large sizes
• A 1px outline in on-surface at 12%, for colored outline buttons too
• Elevation 4 on hover and focus for solid buttons
• Disabled buttons use 38% on-surface text and a 12% container with no elevation, instead of fading the whole button. Material shows disabled elements in a neutral color rather than their own, so a disabled button no longer keeps its color (Material Design 2: disabled state)
• The pressed ripple is 24% on solid buttons and 12% on outline and clear
• Spinners match the 18px icon size, so a button no longer grows to fit one. MD2 allows a spinner in a button but doesn't size it there, so it follows the icon. Other spinner sizes keep their usual ratio to it

To support this, the recipe gains hover.box.shadow, focus.box.shadow and disabled.{color, border.color, box.shadow}. A theme that doesn't set the disabled colors keeps its default colors, so ios and ionic don't change.

Toolbar and datetime buttons keep their current look: no elevation on hover or focus, and disabled toolbar buttons still fade their own colors.

Snapshots are in #31637.

Does this introduce a breaking change?

• Yes
• No

The md button follows Material Design 2 for its spacing, outline, elevation and disabled state. To keep a previous value, set the token for global styles, or the matching --ion-button-* CSS variable for component-specific styles. Replace <fill> with solid, outline or clear, and <size> with small, medium or large.

Property	Previous	New	Token
Padding at the default size	1.1em	16px	IonButton.size.medium.padding.start and .end
Min width at the default size	none	64px	IonButton.size.medium.min.width
Letter spacing	0.06em	0.0893em	IonButton.letter.spacing
Icon size	1.35em	1.2857em (18px at the default size)	IonButton.size.<size>.icon.font.size
Gap between icon and label	0.3em	0.4444em (8px at the default size)	IonButton.size.<size>.icon.leading.margin.end and .trailing.margin.start
Spinner in a button	the spinner's own size (28px by default)	1.2857em by default (18px at the default size), with the other spinner sizes in their usual ratio to it	IonButton.size.<size>.spinner.size.<spinner size>.width and .height
Outline border	2px, the button's color	1px, the text color at 12%	IonButton.hue.bold.outline.default.border.width and .color (.semantic.default.border.color with a color)
Solid elevation on hover and focus	the resting elevation	elevation 4	IonButton.hue.bold.solid.hover.box.shadow and .focus.box.shadow
Disabled	the whole button at 0.5 opacity	38% text color, a 12% container and no elevation	IonButton.hue.bold.<fill>.disabled.opacity, .color, .background and .box.shadow
Pressed ripple	16%	24% on solid, 12% on outline and clear	IonButton.hue.bold.<fill>.rippleEffect.opacity

Buttons in toolbars keep their previous colors when disabled and have no elevation on hover or focus.

Other information

Not matched to MD2 on purpose

• MD2 gives text buttons 8px padding. Padding is set per size, not per fill, and Material 3 sets it per size too, so clear buttons keep the default padding
• Outlined buttons sit 1px wider than MD2, which uses 15px padding to make up for the border, for the same reason
• The round default from feat(button): set default shape to soft for ios and round for md and ionic themes #29404 stays

Known gaps

• The a11y spec still skips a pressed outline button in md's dark toolbar (TODO(FW-6417)). The lighter ripple helps, but the text still falls short of WCAG's 4.5:1. The fix belongs to the dark palette

How to test

Check	Before	After	What to look for
Spacing and icons	Before	After	Labels are spaced wider, icons are slightly smaller with more room before the label
Outline and disabled	Before	After	Borders are thin and gray. Disabled buttons are gray instead of faded
Hover and focus	Before	After	Hover over or tab to a solid button: its shadow grows
Toolbars	Before	After	Only the letter spacing changes, and colored outline buttons get the thin gray border

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Project	Deployment	Actions	Updated
ionic-framework	Ready	Preview	Oct 29, 2026 6:01pm UTC

[ShaneK]

Looks really good, every md value I checked lines up with the PR description! Just a few things, mainly the readonly datetime buttons going gray and the toolbar icon buttons growing to 64px.

[ShaneK]

A readonly datetime disables its Cancel, Clear and Done buttons and sets opacity: 1 so they don't look disabled, but now that md shows disabled through the color they come out at rgba(0, 0, 0, 0.38) instead of primary. Could the readonly rule reset the disabled color too? The same thing happens in ios in #31645, so a fix in datetime would cover both.

[ShaneK]

This reads like every toolbar button loses the hover and focus elevation, but the none overrides are only under IonToolbar.IonButtons. A solid button placed straight in ion-toolbar still goes from elevation 2 to elevation 4 when focused. Should this say buttons in ion-buttons, or should the overrides move up to IonToolbar.IonButton?

[ShaneK]

Only color and border.color fall back to the default here, background doesn't. Maybe something like "An unset color or border.color keeps the default one"?

[ShaneK]

The comment on the spinner rules in button.scss still says only the ionic theme sizes and spaces a slotted spinner, but md sizes it now too. Could we update it to something like "The ionic and md themes size a slotted spinner, and only ionic spaces it"?

[ShaneK]

The outline row mentions the .semantic path for buttons with a color, but this row and the pressed ripple row don't, and both changed under semantic too. Could they mention it as well?

[ShaneK]

With this min width, a toolbar icon button whose icon isn't in slot="icon-only" grows from 35px to 64px, while one with slot="icon-only" stays at 48px. You can see it in the nested popover snapshots in #31637, where the popover shifts too. Leaving out the slot is pretty common in apps, so could IonToolbar.IonButtons.IonButton reset the min width, or should this go in BREAKING.md?