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fix(material/stepper): handle empty label in horizontal stepper #31665

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Merged
merged 1 commit into from
Aug 7, 2025
Merged

fix(material/stepper): handle empty label in horizontal stepper #31665

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6 changes: 6 additions & 0 deletions goldens/material/stepper/index.api.md
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Original file line number Diff line number Diff line change
Expand Up @@ -82,6 +82,12 @@ export class MatStepHeader extends CdkStepHeader implements AfterViewInit, OnDes
// (undocumented)
_getDefaultTextForState(state: StepState): string;
_getHostElement(): HTMLElement;
// (undocumented)
protected _hasEmptyLabel(): boolean;
// (undocumented)
protected _hasErrorLabel(): boolean;
// (undocumented)
protected _hasOptionalLabel(): boolean;
iconOverrides: {
[key: string]: TemplateRef<MatStepperIconContext>;
};
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4 changes: 2 additions & 2 deletions src/material/stepper/step-header.html
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Expand Up @@ -41,11 +41,11 @@
<div class="mat-step-text-label">{{label}}</div>
}

@if (optional && state != 'error') {
@if (_hasOptionalLabel()) {
<div class="mat-step-optional">{{_intl.optionalLabel}}</div>
}

@if (state === 'error') {
@if (_hasErrorLabel()) {
<div class="mat-step-sub-label-error">{{errorMessage}}</div>
}
</div>
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4 changes: 4 additions & 0 deletions src/material/stepper/step-header.scss
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Expand Up @@ -143,6 +143,10 @@ $fallbacks: m3-stepper.get-tokens();
font-size: token-utils.slot(stepper-header-selected-state-label-text-size, $fallbacks);
font-weight: token-utils.slot(stepper-header-selected-state-label-text-weight, $fallbacks);
}

.mat-step-header-empty-label & {
min-width: 0;
}
}

.mat-step-text-label {
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18 changes: 18 additions & 0 deletions src/material/stepper/step-header.ts
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Expand Up @@ -34,6 +34,7 @@ import {_CdkPrivateStyleLoader, _VisuallyHiddenLoader} from '@angular/cdk/privat
styleUrl: 'step-header.css',
host: {
'class': 'mat-step-header',
'[class.mat-step-header-empty-label]': '_hasEmptyLabel()',
'[class]': '"mat-" + (color || "primary")',
'role': 'tab',
},
Expand Down Expand Up @@ -140,4 +141,21 @@ export class MatStepHeader extends CdkStepHeader implements AfterViewInit, OnDes
}
return state;
}

protected _hasEmptyLabel() {
return (
!this._stringLabel() &&
!this._templateLabel() &&
!this._hasOptionalLabel() &&
!this._hasErrorLabel()
);
}

protected _hasOptionalLabel() {
return this.optional && this.state !== 'error';
}

protected _hasErrorLabel() {
return this.state === 'error';
}
}
4 changes: 4 additions & 0 deletions src/material/stepper/stepper.scss
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Expand Up @@ -81,6 +81,10 @@ $fallbacks: m3-stepper.get-tokens();
}
}

&.mat-step-header-empty-label .mat-step-icon {
margin: 0;
}

$vertical-padding: _get-vertical-padding-calc();

&::before,
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