angular/components

tabs: nested mat-tab-group with custom label template puts label on parent tab too

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#10,441 建立於 2018年3月15日

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P4area: material/tabshelp wanted

描述

Bug, feature request, or proposal:

Bug

What is the expected behavior?

Should be able to use a custom tab label template in a sub tab but not in a parent tab.

What is the current behavior?

Having a mat-tab-group within a mat-tab-group with the child mat-tab-group having mat-tab items with a custom tab template (using ng-template) puts the custom tab content on the parent tab too.

What are the steps to reproduce?

StackBlitz repro: https://stackblitz.com/edit/angular-7njwul

What is the use-case or motivation for changing an existing behavior?

Not possible to use a custom tab label template on child tabs without breaking the parent tabs.

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Browsers - all Material: 5.2.4 (+?) Angular 5

Is there anything else we should know?

Nope

貢獻者指南

技術棧
angulartypescript
領域
frontend
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
AngularTypeScript
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
25
研究方向
Investigate the template usage in mat tab group to understand how custom label templates are scoped. The bug occurs when nested tab groups share a template context. Look at the tab component's source code in the Angular Material repository, particularly files like tab group.ts and tab label.ts. Check the provided StackBlitz repro and consider whether the issue stems from improper isolation of template contexts.