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feat(grid, col): resolve breakpoints from config #31518

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0258c7b
feat(grid, col): resolve breakpoints from config
brandyscarney Sep 30, 2026
1cfab39
test(grid, col): add test coverage for the new screenBreakpoints usage
brandyscarney Oct 1, 2026
6f77050
docs(grid, col): mention the screenBreakpoints config
brandyscarney Oct 1, 2026
50bec8b
test(grid, col): clean up for consistency
brandyscarney Oct 1, 2026
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176 changes: 111 additions & 65 deletions BREAKING.md
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Original file line number Diff line number Diff line change
Expand Up @@ -123,7 +123,9 @@ This is a comprehensive list of the breaking changes introduced in the major ver
The following breaking changes apply to `ion-col`:

1. `--ion-grid-column-padding-*` CSS variables have been replaced with per-side, per-breakpoint tokens in the `col` namespace. <sup>[1](#version-10x-col-padding-variables)</sup>
2. Theme classes (`ion-col.md`, `ion-col.ios`) are no longer supported. <sup>[2](#version-10x-col-theme-classes)</sup>
2. The breakpoint-suffixed `size`, `order` and `offset` properties have been deprecated. <sup>[2](#version-10x-col-deprecated-breakpoint-properties)</sup>
3. The `push` and `pull` properties have been deprecated. <sup>[3](#version-10x-col-deprecated-push-and-pull-properties)</sup>
4. Theme classes (`ion-col.md`, `ion-col.ios`) are no longer supported. <sup>[4](#version-10x-col-theme-classes)</sup>

<h5 id="version-10x-col-padding-variables">Padding variables</h5>

Expand All @@ -133,86 +135,52 @@ Column padding was a single value per breakpoint and is now set per-side, and th
|---|---|---|
| `--ion-grid-column-padding-{bp}` | `IonCol.breakpoint.{bp}.padding.{top\|end\|bottom\|start}` | `--ion-col-breakpoint-{bp}-padding-{top\|end\|bottom\|start}` |

<h5 id="version-10x-col-theme-classes">Theme classes</h5>

Remove any instances that target the theme classes: `ion-col.md`, `ion-col.ios`.

<h4 id="version-10x-content">Content</h4>

The following breaking changes apply to `ion-content`:

1. `--background` and `--color` CSS variables have been replaced.
2. `--padding-*` CSS variables are no longer part of the documented public API (but remain functional).
3. `--keyboard-offset`, `--offset-top`, and `--offset-bottom` have been renamed to the `--internal-*` namespace with no replacement.
4. Theme classes (`ion-content.md`, `ion-content.ios`) are no longer supported.

<h5>Removed CSS variables</h5>

`--background` and `--color` have been removed. Use the new token structure for global styles, or the corresponding CSS variable for component-specific overrides:

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--background` | `IonContent.background` | `--ion-content-default-background` |
| `--color` | `IonContent.color` | `--ion-content-default-color` |
<h5 id="version-10x-col-deprecated-breakpoint-properties">Deprecated breakpoint properties</h5>

<h5>Padding variables</h5>
The breakpoint-specific properties (`size-xs` through `size-xl`, along with the `order-*` and `offset-*` equivalents) have been deprecated in favor of setting `size`, `order`, and `offset` to an object containing screen breakpoint values. They continue to work and log a deprecation warning, but will be removed in a future major version.

New code should use the token-based API:
The object form is the only way to target the `xxl` breakpoint.

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--padding-top` | `IonContent.padding.top` | `--ion-content-padding-top` |
| `--padding-end` | `IonContent.padding.end` | `--ion-content-padding-end` |
| `--padding-bottom` | `IonContent.padding.bottom` | `--ion-content-padding-bottom` |
| `--padding-start` | `IonContent.padding.start` | `--ion-content-padding-start` |

> [!NOTE]
> The `--padding-*` overrides and `.ion-padding`, `.ion-padding-*` utility classes in `css/padding.scss` continue to work — `ion-content` honors them as a fallback when the new token is unset. They are no longer part of the documented public API (only `--ion-content-padding-*` is listed in `core/api.txt`), but existing usage will not break.

<h5>Internal-only variables</h5>

The following CSS variables were previously documented `@prop`s on `ion-content` and have been renamed to the `--internal-*` namespace, removing them from the public API:

| Old (9.x) | New |
|---|---|
| `--keyboard-offset` | `--internal-keyboard-offset` |
| `--offset-top` | `--internal-offset-top` |
| `--offset-bottom` | `--internal-offset-bottom` |

These are managed by `ion-content` itself (keyboard avoidance and header/footer offsets) and were never intended for consumer override. There is no replacement — any code that was setting them directly should be removed.
**Version up to 9.x**

<h5>Theme classes</h5>
```html
<ion-col size="12" size-md="6" size-xl="3">Column</ion-col>
```

Remove any instances that target the theme classes: `ion-content.md`, `ion-content.ios`.
**Version 10.x+**

<h4 id="version-10x-datetime">Datetime</h4>
A breakpoint object can only be set as a JavaScript property, since an HTML attribute is always a string.

- The `ion-buttons` component has been removed from the internal implementation of `ion-datetime` and is no longer required when passing custom buttons to the `slot="buttons"`. When providing custom buttons, use a `div` element instead of `ion-buttons`. While existing code using `ion-buttons` may continue to work visually, future updates to the `ion-buttons` component may cause any styles you rely on to break.
```html
<ion-col>Column</ion-col>
```

<h4 id="version-10x-grid">Grid</h4>
```ts
const col = document.querySelector('ion-col');
col.size = { xs: 12, md: 6, xl: 3 };
```

The following breaking changes apply to `ion-grid`:
In a framework, bind the object directly:

1. `--ion-grid-padding-*` CSS variables have been replaced with per-side, per-breakpoint tokens. <sup>[1](#version-10x-grid-padding-variables)</sup>
2. `--ion-grid-width-*` CSS variables for the fixed grid have been replaced with per-breakpoint tokens. <sup>[2](#version-10x-grid-fixed-width-variables)</sup>
3. The `push` and `pull` properties have been deprecated. <sup>[3](#version-10x-grid-deprecated-push-and-pull-properties)</sup>
4. Theme classes (`ion-grid.md`, `ion-grid.ios`) are no longer supported. <sup>[4](#version-10x-grid-theme-classes)</sup>
```tsx
<IonCol size={{ xs: 12, md: 6, xl: 3 }}>Column</IonCol>
```

<h5 id="version-10x-grid-padding-variables">Padding variables</h5>
The unsuffixed single-value form is unchanged and still applies at every screen size:

Grid padding was a single value per breakpoint and is now set per-side. Use the new token structure for global styles, or the corresponding CSS variable for component-specific overrides:
```html
<ion-col size="6">Column</ion-col>
```

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--ion-grid-padding-{bp}` | `IonGrid.breakpoint.{bp}.padding.{top\|end\|bottom\|start}` | `--ion-grid-breakpoint-{bp}-padding-{top\|end\|bottom\|start}` |
To reset a column to the default flex layout at a breakpoint and above, use an empty string or `null` — the equivalent of the old value-less attribute (`<ion-col size="12" size-md>`):

<h5 id="version-10x-grid-fixed-width-variables">Fixed width variables</h5>
```ts
col.size = { xs: 12, md: null };
```

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--ion-grid-width-{bp}` | `IonGrid.breakpoint.{bp}.width` | `--ion-grid-breakpoint-{bp}-width` |
If both forms are set for the same property, the object form takes precedence, and the suffixed properties are ignored with a warning.

<h5 id="version-10x-grid-deprecated-push-and-pull-properties">Deprecated <code>push</code> and <code>pull</code> properties</h5>
<h5 id="version-10x-col-deprecated-push-and-pull-properties">Deprecated <code>push</code> and <code>pull</code> properties</h5>

The `push` and `pull` properties have been disabled. They now log a deprecation warning and no longer affect layout. Use the `order` property to achieve a similar result.

Expand Down Expand Up @@ -332,6 +300,84 @@ To reorder two columns where column 1 has `size="9" push="3"` and column 2 has `
</ion-grid>
```

<h5 id="version-10x-col-theme-classes">Theme classes</h5>

Remove any instances that target the theme classes: `ion-col.md`, `ion-col.ios`.

<h4 id="version-10x-content">Content</h4>

The following breaking changes apply to `ion-content`:

1. `--background` and `--color` CSS variables have been replaced.
2. `--padding-*` CSS variables are no longer part of the documented public API (but remain functional).
3. `--keyboard-offset`, `--offset-top`, and `--offset-bottom` have been renamed to the `--internal-*` namespace with no replacement.
4. Theme classes (`ion-content.md`, `ion-content.ios`) are no longer supported.

<h5>Removed CSS variables</h5>

`--background` and `--color` have been removed. Use the new token structure for global styles, or the corresponding CSS variable for component-specific overrides:

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--background` | `IonContent.background` | `--ion-content-default-background` |
| `--color` | `IonContent.color` | `--ion-content-default-color` |

<h5>Padding variables</h5>

New code should use the token-based API:

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--padding-top` | `IonContent.padding.top` | `--ion-content-padding-top` |
| `--padding-end` | `IonContent.padding.end` | `--ion-content-padding-end` |
| `--padding-bottom` | `IonContent.padding.bottom` | `--ion-content-padding-bottom` |
| `--padding-start` | `IonContent.padding.start` | `--ion-content-padding-start` |

> [!NOTE]
> The `--padding-*` overrides and `.ion-padding`, `.ion-padding-*` utility classes in `css/padding.scss` continue to work — `ion-content` honors them as a fallback when the new token is unset. They are no longer part of the documented public API (only `--ion-content-padding-*` is listed in `core/api.txt`), but existing usage will not break.

<h5>Internal-only variables</h5>

The following CSS variables were previously documented `@prop`s on `ion-content` and have been renamed to the `--internal-*` namespace, removing them from the public API:

| Old (9.x) | New |
|---|---|
| `--keyboard-offset` | `--internal-keyboard-offset` |
| `--offset-top` | `--internal-offset-top` |
| `--offset-bottom` | `--internal-offset-bottom` |

These are managed by `ion-content` itself (keyboard avoidance and header/footer offsets) and were never intended for consumer override. There is no replacement — any code that was setting them directly should be removed.

<h5>Theme classes</h5>

Remove any instances that target the theme classes: `ion-content.md`, `ion-content.ios`.

<h4 id="version-10x-datetime">Datetime</h4>

- The `ion-buttons` component has been removed from the internal implementation of `ion-datetime` and is no longer required when passing custom buttons to the `slot="buttons"`. When providing custom buttons, use a `div` element instead of `ion-buttons`. While existing code using `ion-buttons` may continue to work visually, future updates to the `ion-buttons` component may cause any styles you rely on to break.

<h4 id="version-10x-grid">Grid</h4>

The following breaking changes apply to `ion-grid`:

1. `--ion-grid-padding-*` CSS variables have been replaced with per-side, per-breakpoint tokens. <sup>[1](#version-10x-grid-padding-variables)</sup>
2. `--ion-grid-width-*` CSS variables for the fixed grid have been replaced with per-breakpoint tokens. <sup>[2](#version-10x-grid-fixed-width-variables)</sup>
3. Theme classes (`ion-grid.md`, `ion-grid.ios`) are no longer supported. <sup>[3](#version-10x-grid-theme-classes)</sup>

<h5 id="version-10x-grid-padding-variables">Padding variables</h5>

Grid padding was a single value per breakpoint and is now set per-side. Use the new token structure for global styles, or the corresponding CSS variable for component-specific overrides:

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--ion-grid-padding-{bp}` | `IonGrid.breakpoint.{bp}.padding.{top\|end\|bottom\|start}` | `--ion-grid-breakpoint-{bp}-padding-{top\|end\|bottom\|start}` |

<h5 id="version-10x-grid-fixed-width-variables">Fixed width variables</h5>

| Old (9.x) | New token (global) | New CSS variable (component-specific) |
|---|---|---|
| `--ion-grid-width-{bp}` | `IonGrid.breakpoint.{bp}.width` | `--ion-grid-breakpoint-{bp}-width` |

<h5 id="version-10x-grid-theme-classes">Theme classes</h5>

Remove any instances that target the theme classes: `ion-grid.md`, `ion-grid.ios`.
Expand Down
6 changes: 3 additions & 3 deletions core/api.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -749,13 +749,13 @@ ion-chip,css-prop,--ion-chip-state-focus-ring-width

ion-col,shadow
ion-col,prop,mode,"ios" | "md",undefined,false,false
ion-col,prop,offset,string | undefined,undefined,false,false
ion-col,prop,offset,BreakpointMap<string | number | null> | number | string | undefined,undefined,false,false
ion-col,prop,offsetLg,string | undefined,undefined,false,false
ion-col,prop,offsetMd,string | undefined,undefined,false,false
ion-col,prop,offsetSm,string | undefined,undefined,false,false
ion-col,prop,offsetXl,string | undefined,undefined,false,false
ion-col,prop,offsetXs,string | undefined,undefined,false,false
ion-col,prop,order,string | undefined,undefined,false,false
ion-col,prop,order,BreakpointMap<string | number | null> | number | string | undefined,undefined,false,false
ion-col,prop,orderLg,string | undefined,undefined,false,false
ion-col,prop,orderMd,string | undefined,undefined,false,false
ion-col,prop,orderSm,string | undefined,undefined,false,false
Expand All @@ -773,7 +773,7 @@ ion-col,prop,pushMd,string | undefined,undefined,false,false
ion-col,prop,pushSm,string | undefined,undefined,false,false
ion-col,prop,pushXl,string | undefined,undefined,false,false
ion-col,prop,pushXs,string | undefined,undefined,false,false
ion-col,prop,size,string | undefined,undefined,false,false
ion-col,prop,size,BreakpointMap<string | number | null> | number | string | undefined,undefined,false,false
ion-col,prop,sizeLg,string | undefined,undefined,false,false
ion-col,prop,sizeMd,string | undefined,undefined,false,false
ion-col,prop,sizeSm,string | undefined,undefined,false,false
Expand Down
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