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Fixed bug in removeUselessDefs #1923

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merged 2 commits into from
Jan 3, 2024
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johnkenny54
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This change applies the same logic used to process <def> elements to all non-rendering elements (i.e. preserve referenced children, and only delete the parent if no children remain).

This fix is part of the solution to removing the media-flash.svg mismatches in test-regression. This fix alone does not change the number of regression mismatches.

Closes #1922.

- treat nonrendering elements the same as defs (preserve useful nodes).
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This looks great! Thanks for looking through and spotting the issue.

This also reveals a bug in Firefox, so I'll file a report that too. The new test case doesn't render in Firefox, but does render in Chromium and Eye of GNOME.

test/plugins/removeUselessDefs.05.svg Show resolved Hide resolved
test/plugins/removeUselessDefs.04.svg Outdated Show resolved Hide resolved
Co-authored-by: Seth Falco <seth@falco.fun>
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I'm not surprised by the Firefox error. It's kind of dumb SVG, and I wasn't sure my test case would actually render, but it does appear to be valid.

The test case (and presumably the media-flash.svg file) probably could be optimized by "hoisting" the linearGradient, which would then make the <symbol> deleteable, but that seems like a new plugin.

@SethFalco SethFalco merged commit 51c59f5 into svg:main Jan 3, 2024
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SethFalco commented Jan 3, 2024

Thanks for submitting the PR!

Bug report filed here:

@johnkenny54 johnkenny54 deleted the removeUselessDefs branch January 8, 2024 02:53
nono referenced this pull request in cozy/cozy-stack May 13, 2024
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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [svgo](https://svgo.dev) ([source](https://togithub.com/svg/svgo)) |
[`3.2.0` -> `3.3.2`](https://renovatebot.com/diffs/npm/svgo/3.2.0/3.3.2)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/svgo/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/svgo/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/svgo/3.2.0/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/svgo/3.2.0/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>svg/svgo (svgo)</summary>

### [`v3.3.2`](https://togithub.com/svg/svgo/releases/tag/v3.3.2)

[Compare Source](https://togithub.com/svg/svgo/compare/v3.3.1...v3.3.2)

##### Notice

An update on what happened with v3.3.0 and v3.3.1. While we have
retained CJS support, the migration to EMS has changed the acceptable
ways to import SVGO, in ways that users depended on before. This
effectively made SVGO v3 a breaking change.

Rather than resolve or workaround these differences, we've opted to
release SVGO v3.3.2, which is effectively a revert to v3.2.0, and
deprecate versions v3.3.0 and v3.3.1. We'll then proceed to work on
releasing v4 which will document the breaking changes, and feature
further breaking changes that were slated for v4, like disabling
`removeViewBox` by default.

Before the v4.0.0 release, I'll put more focus on testing and use
release candidates, just to help make the release go smoothly! 👍🏽

Sorry for the headache, and thanks for your patience.

### [`v3.3.1`](https://togithub.com/svg/svgo/releases/tag/v3.3.1)

[Compare Source](https://togithub.com/svg/svgo/compare/v3.3.0...v3.3.1)

##### Notice

SVGO v3.3.0, which was meant to migrate to ESM without breaking CJS
support, unfortunately broke CJS projects. There was a mistake with
exports, so the `loadConfig` function wasn't available in the CJS bundle
and lead to issues for many users.

Thanks to everyone who raised the issue, and to
[@&#8203;nuintun](https://togithub.com/nuintun) who submitted a pull
request to resolve it so quickly.

I apologize for letting that breaking change through, and will aim to do
better. Namely, by adding more tests to cover our exports, and any other
public interface in general for each distribution of SVGO, so this
doesn't happen again.

SVGO v3.3.1 should resolve the issue for CJS projects, but if you
encounter anything else, do let us know by opening an issue on GitHub.

### [`v3.3.0`](https://togithub.com/svg/svgo/releases/tag/v3.3.0)

[Compare Source](https://togithub.com/svg/svgo/compare/v3.2.0...v3.3.0)

##### Deprecated

This release introduced breaking changes, which have been reverted in
v3.3.2. The bug fixes will be reintroduced in v4.0.0.

##### What's Changed

##### ESM

SVGO is now a dual package, serving for both Common JS and ESM usage. We
believe there shouldn't be any problems, especially as SVGO as largely
stateless, but feel free to open an issue if you encounter problems with
this.

To be explicit, this is not a breaking change, and SVGO should continue
to work in Common JS projects!

Thanks to [@&#8203;jdufresne](https://togithub.com/jdufresne) for doing
the bulk of the work.

##### Default Behavior

- [`convertColors`](), now converts all references to colors excluding
references to IDs to lowercase. This can be disabled by setting
`convertCase` to `false`.

##### Bug Fixes

- [`cleanupIds`](), treat both URI encoded and non-URI encoded IDs as
the same. By [@&#8203;liuweifeng](https://togithub.com/liuweifeng) in
[#&#8203;1982](https://togithub.com/svg/svgo/issues/1982)
- [`collapseGroups`](), check styles as well as attributes. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1952](https://togithub.com/svg/svgo/issues/1952)
- [`collapseGroups`](), move attributes atomically. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[https://github.com/svg/svgo/pull/1930](https://togithub.com/svg/svgo/pull/1930)
- [`convertPathData`](), fix q control point when item is removed. By
[@&#8203;KTibow](https://togithub.com/KTibow) in
[https://github.com/svg/svgo/pull/1927](https://togithub.com/svg/svgo/pull/1927)
- [`convertPathData`](), preserve vertex for markers only paths. By
[@&#8203;SethFalco](https://togithub.com/SethFalco) in
[#&#8203;1967](https://togithub.com/svg/svgo/issues/1967)
- [`mergePaths`](), don't merge paths if attributes/styles depend depend
on the nodes bounding box. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1964](https://togithub.com/svg/svgo/issues/1964)
- [`moveElemsAttrsToGroups`](), no longer moves the transforms if group
has the `filter` attribute. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1933](https://togithub.com/svg/svgo/issues/1933)
- [`prefixIds`](), fixed issue where some IDs were not prefixed when
style tag contained XML comments. By
[@&#8203;john-neptune](https://togithub.com/john-neptune) in
[#&#8203;1942](https://togithub.com/svg/svgo/issues/1942)
- [`removeHiddenElems`](), don't remove node if child element has a
referenced ID. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[https://github.com/svg/svgo/pull/1925](https://togithub.com/svg/svgo/pull/1925)
- [`removeHiddenElems`](), treat `path[opacity=0]` as a non-rendering
node. By [@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1948](https://togithub.com/svg/svgo/issues/1948)
-
[`removeUselessDefs`](https://svgo.dev/docs/plugins/remove-useless-defs/),
don't remove node if child element has an ID. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[https://github.com/svg/svgo/pull/1923](https://togithub.com/svg/svgo/pull/1923)
- When stringifying path data, include a space before numbers
represented in scientific notation. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1961](https://togithub.com/svg/svgo/issues/1961)
- No longer crashes when the output (`-o` argument) ends with a trailing
slash to a location that didn't exist. By
[@&#8203;SethFalco](https://togithub.com/SethFalco) in
[#&#8203;1954](https://togithub.com/svg/svgo/issues/1954)

##### SVG Optimization

- [`convertColors`](), introduce parameter to convert colors to common
casing (lowercase/uppercase). By
[@&#8203;JayLeininger](https://togithub.com/JayLeininger) in
[https://github.com/svg/svgo/pull/1692](https://togithub.com/svg/svgo/pull/1692)
- [`removeDeprecatedAttrs`](), new plugin that is disabled by default to
remove SVG attributes that are deprecated. By
[@&#8203;jdufresne](https://togithub.com/jdufresne) in
[#&#8203;1869](https://togithub.com/svg/svgo/issues/1869)

##### Metrics

Before and after using vectors from various sources, with the default
preset of each respective version:

| SVG | Original | v3.2.0 | v3.3.0 | Delta |
|---|---|---|---|---|
| [Arch Linux Logo](https://archlinux.org/art/) | 9.529 KiB | 4.115 KiB
| 4.097 KiB | ⬇️ 0.018 KiB |
|
[Blobs](https://gitlab.gnome.org/GNOME/gnome-backgrounds/-/blob/main/backgrounds/blobs-d.svg)
| 50.45 KiB | 42.623 KiB | 42.609 KiB | ⬇️ 0.014 KiB |
| [Isometric
Madness](https://inkscape.org/~Denis_Kuznetsky/%E2%98%85isometric-madness)
| 869.034 KiB | 540.582 KiB | 540.073 KiB | ⬇️ 0.509 KiB |
| [tldr-pages
Banner](https://togithub.com/tldr-pages/tldr/blob/main/images/banner.svg)
| 2.071 KiB | 1.07 KiB | 1.07 KiB | |
| [Wikipedia
Logo](https://en.wikipedia.org/wiki/File:Wikipedia-logo-v2.svg) |
161.551 KiB | 111.668 KiB | 111.668 KiB | |

Before and after of the browser bundle of each respective version:

| | v3.2.0 | v3.3.0 | Delta |
|---|---|---|---|
| svgo.browser.js | 910.9 kB | 753.0 kB | ⬇️ 157.9 kB |

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "before 6am on Monday" in timezone
Europe/Paris, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [svgo](https://svgo.dev) ([source](https://togithub.com/svg/svgo)) |
[`3.2.0` -> `3.3.2`](https://renovatebot.com/diffs/npm/svgo/3.2.0/3.3.2)
|
[![age](https://developer.mend.io/api/mc/badges/age/npm/svgo/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/svgo/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/svgo/3.2.0/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/svgo/3.2.0/3.3.2?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>svg/svgo (svgo)</summary>

### [`v3.3.2`](https://togithub.com/svg/svgo/releases/tag/v3.3.2)

[Compare Source](https://togithub.com/svg/svgo/compare/v3.3.1...v3.3.2)

#### Notice

An update on what happened with v3.3.0 and v3.3.1. While we have
retained CJS support, the migration to EMS has changed the acceptable
ways to import SVGO, in ways that users depended on before. This
effectively made SVGO v3 a breaking change.

Rather than resolve or workaround these differences, we've opted to
release SVGO v3.3.2, which is effectively a revert to v3.2.0, and
deprecate versions v3.3.0 and v3.3.1. We'll then proceed to work on
releasing v4 which will document the breaking changes, and feature
further breaking changes that were slated for v4, like disabling
`removeViewBox` by default.

Before the v4.0.0 release, I'll put more focus on testing and use
release candidates, just to help make the release go smoothly! 👍🏽

Sorry for the headache, and thanks for your patience.

### [`v3.3.1`](https://togithub.com/svg/svgo/releases/tag/v3.3.1)

[Compare Source](https://togithub.com/svg/svgo/compare/v3.3.0...v3.3.1)

#### Notice

SVGO v3.3.0, which was meant to migrate to ESM without breaking CJS
support, unfortunately broke CJS projects. There was a mistake with
exports, so the `loadConfig` function wasn't available in the CJS bundle
and lead to issues for many users.

Thanks to everyone who raised the issue, and to
[@&#8203;nuintun](https://togithub.com/nuintun) who submitted a pull
request to resolve it so quickly.

I apologize for letting that breaking change through, and will aim to do
better. Namely, by adding more tests to cover our exports, and any other
public interface in general for each distribution of SVGO, so this
doesn't happen again.

SVGO v3.3.1 should resolve the issue for CJS projects, but if you
encounter anything else, do let us know by opening an issue on GitHub.

### [`v3.3.0`](https://togithub.com/svg/svgo/releases/tag/v3.3.0)

[Compare Source](https://togithub.com/svg/svgo/compare/v3.2.0...v3.3.0)

#### Deprecated

This release introduced breaking changes, which have been reverted in
v3.3.2. The bug fixes will be reintroduced in v4.0.0.

#### What's Changed

##### ESM

SVGO is now a dual package, serving for both Common JS and ESM usage. We
believe there shouldn't be any problems, especially as SVGO as largely
stateless, but feel free to open an issue if you encounter problems with
this.

To be explicit, this is not a breaking change, and SVGO should continue
to work in Common JS projects!

Thanks to [@&#8203;jdufresne](https://togithub.com/jdufresne) for doing
the bulk of the work.

##### Default Behavior

- [`convertColors`](), now converts all references to colors excluding
references to IDs to lowercase. This can be disabled by setting
`convertCase` to `false`.

##### Bug Fixes

- [`cleanupIds`](), treat both URI encoded and non-URI encoded IDs as
the same. By [@&#8203;liuweifeng](https://togithub.com/liuweifeng) in
[#&#8203;1982](https://togithub.com/svg/svgo/issues/1982)
- [`collapseGroups`](), check styles as well as attributes. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1952](https://togithub.com/svg/svgo/issues/1952)
- [`collapseGroups`](), move attributes atomically. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[https://github.com/svg/svgo/pull/1930](https://togithub.com/svg/svgo/pull/1930)
- [`convertPathData`](), fix q control point when item is removed. By
[@&#8203;KTibow](https://togithub.com/KTibow) in
[https://github.com/svg/svgo/pull/1927](https://togithub.com/svg/svgo/pull/1927)
- [`convertPathData`](), preserve vertex for markers only paths. By
[@&#8203;SethFalco](https://togithub.com/SethFalco) in
[#&#8203;1967](https://togithub.com/svg/svgo/issues/1967)
- [`mergePaths`](), don't merge paths if attributes/styles depend depend
on the nodes bounding box. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1964](https://togithub.com/svg/svgo/issues/1964)
- [`moveElemsAttrsToGroups`](), no longer moves the transforms if group
has the `filter` attribute. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1933](https://togithub.com/svg/svgo/issues/1933)
- [`prefixIds`](), fixed issue where some IDs were not prefixed when
style tag contained XML comments. By
[@&#8203;john-neptune](https://togithub.com/john-neptune) in
[#&#8203;1942](https://togithub.com/svg/svgo/issues/1942)
- [`removeHiddenElems`](), don't remove node if child element has a
referenced ID. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[https://github.com/svg/svgo/pull/1925](https://togithub.com/svg/svgo/pull/1925)
- [`removeHiddenElems`](), treat `path[opacity=0]` as a non-rendering
node. By [@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1948](https://togithub.com/svg/svgo/issues/1948)
-
[`removeUselessDefs`](https://svgo.dev/docs/plugins/remove-useless-defs/),
don't remove node if child element has an ID. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[https://github.com/svg/svgo/pull/1923](https://togithub.com/svg/svgo/pull/1923)
- When stringifying path data, include a space before numbers
represented in scientific notation. By
[@&#8203;johnkenny54](https://togithub.com/johnkenny54) in
[#&#8203;1961](https://togithub.com/svg/svgo/issues/1961)
- No longer crashes when the output (`-o` argument) ends with a trailing
slash to a location that didn't exist. By
[@&#8203;SethFalco](https://togithub.com/SethFalco) in
[#&#8203;1954](https://togithub.com/svg/svgo/issues/1954)

##### SVG Optimization

- [`convertColors`](), introduce parameter to convert colors to common
casing (lowercase/uppercase). By
[@&#8203;JayLeininger](https://togithub.com/JayLeininger) in
[https://github.com/svg/svgo/pull/1692](https://togithub.com/svg/svgo/pull/1692)
- [`removeDeprecatedAttrs`](), new plugin that is disabled by default to
remove SVG attributes that are deprecated. By
[@&#8203;jdufresne](https://togithub.com/jdufresne) in
[#&#8203;1869](https://togithub.com/svg/svgo/issues/1869)

#### Metrics

Before and after using vectors from various sources, with the default
preset of each respective version:

| SVG | Original | v3.2.0 | v3.3.0 | Delta |
|---|---|---|---|---|
| [Arch Linux Logo](https://archlinux.org/art/) | 9.529 KiB | 4.115 KiB
| 4.097 KiB | ⬇️ 0.018 KiB |
|
[Blobs](https://gitlab.gnome.org/GNOME/gnome-backgrounds/-/blob/main/backgrounds/blobs-d.svg)
| 50.45 KiB | 42.623 KiB | 42.609 KiB | ⬇️ 0.014 KiB |
| [Isometric
Madness](https://inkscape.org/~Denis_Kuznetsky/%E2%98%85isometric-madness)
| 869.034 KiB | 540.582 KiB | 540.073 KiB | ⬇️ 0.509 KiB |
| [tldr-pages
Banner](https://togithub.com/tldr-pages/tldr/blob/main/images/banner.svg)
| 2.071 KiB | 1.07 KiB | 1.07 KiB | |
| [Wikipedia
Logo](https://en.wikipedia.org/wiki/File:Wikipedia-logo-v2.svg) |
161.551 KiB | 111.668 KiB | 111.668 KiB | |

Before and after of the browser bundle of each respective version:

| | v3.2.0 | v3.3.0 | Delta |
|---|---|---|---|
| svgo.browser.js | 910.9 kB | 753.0 kB | ⬇️ 157.9 kB |

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "on Monday after 10am before 7pm" in
timezone Asia/Seoul, Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Mend
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removeUselessDefs removes <symbol> which contains children with IDs
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