bug(mat-nested-tree-node): Indent increases by level

[tonyhook]

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

When we use matTreeNodePadding on , the indent should always be 40px because the div element is embedded in its parent div element. It should be different with .

Reproduction

StackBlitz link: https://stackblitz.com/edit/components-issue-starter-jotfnbjm
Steps to reproduce:

1. click apple
2. click pie

Expected Behavior

The indent should keep 40px for all nested tree nodes.

Actual Behavior

The indent is 40px for level 1, 80px for level 2 ...

Environment

• Angular: 19.2.4
• CDK/Material: 19.2.7
• Browser(s): Chrome, Safari
• Operating System (e.g. Windows, macOS, Ubuntu): MacOS

[SergheiGurgurov]

I suppose the matTreeNodePadding/cdkTreeNodePadding was not designed to work with nested nodes,
since they are already displayed in a hierarchical way you can simply add padding like this and it should work fine.

mat-nested-tree-node {
  padding-left:40px;
}

but i agree it's confusing, and one would expect the directive to just work regardless.

[SergheiGurgurov]

actually i found in the material docs it's explicitly mentioned that the matTreeNodePadding is only for flat trees

[crisbeto]

Sounds like this is working as expected. Closing.

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