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fix(menu): cap maximum elevation for nested menus #17687

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Nov 25, 2019
Merged

fix(menu): cap maximum elevation for nested menus #17687

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4 changes: 3 additions & 1 deletion src/material/menu/menu.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -374,7 +374,9 @@ export class _MatMenuBase implements AfterContentInit, MatMenuPanel<MatMenuItem>
*/
setElevation(depth: number): void {
// The elevation starts at the base and increases by one for each level.
const newElevation = `mat-elevation-z${MAT_MENU_BASE_ELEVATION + depth}`;
// Capped at 24 because that's the maximum elevation defined in the Material design spec.
const elevation = Math.min(MAT_MENU_BASE_ELEVATION + depth, 24);
const newElevation = `mat-elevation-z${elevation}`;
const customElevation = Object.keys(this._classList).find(c => c.startsWith('mat-elevation-z'));

if (!customElevation || customElevation === this._previousElevation) {
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