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docs: document overlay stacking change in v21 update guide

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lazerg
2026-07-28 15:22:03 +05:00
committed by Jessica Janiuk
parent 32815d5472
commit ae303c4a05
1 changed files with 9 additions and 0 deletions
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adev/src/app/features/update/recommendations.ts
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@@ -2781,6 +2781,15 @@ export const RECOMMENDATIONS: Step[] = [
step: 'update @angular/material',
action: 'Run `ng update @angular/material@21`.',
},
{
possibleIn: 2100,
necessaryAsOf: 2100,
level: ApplicationComplexity.Medium,
material: true,
step: '21.0.0-cdk-overlay-top-layer-stacking',
action:
"CDK overlays can now render in the browser's native top layer, causing elements that previously appeared above Material overlays via `z-index` to render beneath them. You can restore the previous behavior by providing `OVERLAY_DEFAULT_CONFIG` from `@angular/cdk/overlay` with the value `{usePopover: false}`.",
},
{
possibleIn: 2100,
necessaryAsOf: 2100,