# CSS scrollbar-1 test coverage report

## 2024-01-24

Prepared by:
  Florian Rivoal (Invited Expert)

## 1. Introduction

Tests

This section is not normative, it does not need tests.

### 1.1. Scope

Tests

This section is not normative, it does not need tests.

#### 1.1.1. Out Of Scope

Tests

This section is not normative, it does not need tests.

### 1.2. Value Definitions

Tests

This section does not introduce any new normative requirement, it does not need tests.

## 2. Scrollbar Colors: the scrollbar-color property

Tests

This section has partial test coverage.

Missing:

- Tests checking that the property does anything

- Tests checking that the colors apply to the right parts

- Initial value

The following tests have no basis in the spec: they assume that making the thumb and the track transparent must make the whole scollbar invisible. This is not necessarily true:

- the scrollbar may have other parts, such as scroll up/down/left/right buttons

- the spec does not require that the thumb / track are painted solid with the specified colors

- scrollbar-color-012.html (live test) (source)
- transparent-on-root.html (live test) (source)

## 3. Scrollbar Thickness: the scrollbar-width property

Tests

This section has partial test coverage.

Missing:

- Test that thin does something different from auto in at least some cases

- Test that none does not affect scrollability

- Initial value

## Appendix A. Acknowledgments

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This section is not normative, it does not need tests.

## Appendix B. Changes

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This section is not normative, it does not need tests.

### Changes since the 6 December 2021 Candidate Recommendation

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This section is not normative, it does not need tests.

### Changes since the 2021-12-02 Working Draft

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This section is not normative, it does not need tests.

### Changes from the 2021-08-05 Working Draft

Tests

This section is not normative, it does not need tests.

### Changes from the 2018-09-25 First Public Working Draft

Tests

This section is not normative, it does not need tests.

## Appendix C. Security and Privacy

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This section is not normative, it does not need tests.

### Considerations for Security

Tests

This section is not normative, it does not need tests.

### Considerations for Privacy

Tests

This section is not normative, it does not need tests.

### Self-review questionnaire

Tests

This section is not normative, it does not need tests.

## Appendix D. Considerations for accessibility

Tests

This section is not normative, it does not need tests.