angular / angular/components

bug(Slider): Thumbs positions not updating after start and end value updates in the same time as max attribute

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#31,119 0 comments 0 reactions 0 assignees View on GitHub
area: material/slider P3
Dominant language
TypeScript
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Description

### 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

I use the slider as a date range selector. It has 2 possibles ranges, by month or by year.
I give the component an array with every periods and the ranger slider is like an index selector to get min and max value.
I have a first toggle button to help me chose which view to render.
When changing view, the value is updated but both thumbs are not rendered at the right positions.

### Reproduction

StackBlitz link: https://stackblitz.com/edit/components-issue-starter-f3mseegb?file=src%2Fapp%2Fdate-range%2Fdate-range.component.ts
Steps to reproduce:
1. Click "View per year"
2.Click "View per month"

### Expected Behavior

The thumb should be positioned where the 35 is on the slider

### Actual Behavior

The start value is 35 but the thumb position is 0.

### Environment

- Angular: 19
- CDK/Material: 18
- Browser(s): Arc
- Operating System (e.g. Windows, macOS, Ubuntu): macOS

Contributor guide

Open the contributing guide

Research direction

Start with the StackBlitz reproduction in src/app/date-range/date-range.component.ts and reproduce the issue by clicking “View per year” followed by “View per month.” Inspect how the slider’s start, end, and max values change together; done means the start value of 35 places the thumb at the corresponding position after switching views.

Written by the indexing model from the issue text.

Assessment

Tech stack
angular, typescript
Domain
frontend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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