bug(Mat-Slider): showTickMarks not displaying tick marks

[Shripad98600]

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

While using the Angular Material mat-slider component, I encountered an issue where enabling the showTickMarks input does not render tick marks on the slider as expected.

Reproduction

StackBlitz link:
Steps to reproduce:

1. Add a component in the template.
2. Set the showTickMarks input to true.
3. Provide step, min, and max values.
4. Observe that tick marks are not displayed on the slider.

Expected Behavior

Tick marks should be visible on the slider when showTickMarks is set to true and valid step, min, and max values are provided.

Actual Behavior

Tick marks are not rendered, even though all required inputs are set.

Environment

• Angular: 20
• CDK/Material:20.1.2
• Browser(s): All
• Operating System (e.g. Windows, macOS, Ubuntu):Windows

[crisbeto]

We can't help much without an example, but this works for me so it's likely an issue with your setup:

<mat-slider min="0" max="1000" step="10" showTickMarks>
  <input matSliderThumb>
</mat-slider>

[Shripad98600]

https://stackblitz.com/edit/components-issue-starter-zvpvyrmv?file=src%2Fmain.ts
please check StackBlitz for this issue

[crisbeto]

I see, it seems like we don't handle changing them dynamically.