bug(mat-date-picker): month shown twice in date picker

未关闭 适合新手
#33,763 1 条评论 2 个 reaction 已指派 0 人 在 GitHub 查看

还没有人认领这个 Issue。

评估

难度
2/5
预计耗时
1-3 小时
新手友好度
72/100
Issue 类型
缺陷
描述清晰度
基本清楚
活跃度
活跃
技术栈
angular, typescript
领域
frontend

调研方向

先在 Basic datepicker example 中复现该问题,然后阅读 src/material/datepicker/calendar.ts 中日历标题和报告所引用的月份视图标签附近的代码。确认重复的月份出现在 day-picker mode 中,并验证下方的月份标签不存在,而 month-year control 仍然可见。

由索引模型根据 Issue 内容生成。

描述

area: material/datepicker gemini-triaged P4
Is this a regression?
  • Yes, this behavior used to work in the previous version
The previous version in which this bug was not present was

No response

Description

The month appears twice in the date picker, once in the month-year element at the top

#mat-datepicker-0 > mat-calendar-header > div > div > button.mdc-button.mat-mdc-button-base.mat-calendar-period-button.mat-mdc-button.mat-unthemed > span.mdc-button__label > span

SEP 2026

and then again in the body of the calendar below the days of week headers

#mat-datepicker-0 > div > mat-month-view > table > tbody > tr:nth-child(1) > td.mat-calendar-body-label

SEP


Some of this code is from:
https://github.com/angular/components/blob/a69732f546a5f1f43faeb0039fa08e4f7a1150f0/src/material/datepicker/calendar.ts#L162-L164
The other side is really old:
https://github.com/angular/components/blob/3b31d7b88998d3c26530436e72e1b57283e1cbde/src/lib/datepicker/calendar.ts#L91-L93

Reproduction

Steps to reproduce:

  1. Visit https://material.angular.dev/components/datepicker/overview
  2. Click the 📆 button next to Choose a date in the Basic datepicker box
  3. See the current month and current year at the top left
  4. See the current month again two lines below
Expected Behavior

Don't show the current month again below the days of the week when in day picker mode and the month is shown at the top.

Actual Behavior

The month is shown twice.

Image
Environment
  • Angular: 21.2.9
  • CDK/Material: 21.2.9
  • Browser(s): chrome
  • Operating System (e.g. Windows, macOS, Ubuntu): macOS
主要语言
TypeScript
星标
25k
派生
6.8k
平均合并
1 天 2 小时
30 天内合并 PR
81

贡献指南

打开贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

angular/components 的其他 Issue

查看 angular/components 的全部 Issue

相似的 Issue

更多 TypeScript Issue

把新 issue 发到你的邮箱

精选适合新手参与的 GitHub issue 摘要。