servo/html5ever

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High-performance browser-grade HTML5 parser

Stars: 2.6k
Forks: 288
Open beginner issues: 0
Indexed issues: 59
Avg merge: 2d 22h
Merged PRs (30d): 8

Dominant language: Rust
License: No license data
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 19, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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59 open issues indexed

rcdom: selectedcontent lookup reads self.data, option clone never runs Open

Difficulty 1/5 Under an hour Newbie friendliness 90/100

servo/html5ever#776 · 1 comment · Opened Aug 21, 2026
ci: semver-check action doesn't run on PRs from same repo Open

Difficulty 3/5 1-2 days Newbie friendliness 52/100

servo/html5ever#768 · 1 comment · Opened Aug 6, 2026
Byte-accurate source positions in TreeSink Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

servo/html5ever#734 · 11 comments · Opened Apr 2, 2026
selectedcontent issues Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#712 · 3 comments · Opened Jan 12, 2026
Implement faster tokenizer versions for `DOMParser`/`innerHTML` Open

experiment performance

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#703 · Opened Dec 25, 2025
the tree builder will modify the original doc's dom structure when encounters a foreign tag that it doesn't expect Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

servo/html5ever#694 · Opened Nov 19, 2025
Unify named character reference tokenizer of xml5ever and html5ever Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#652 · Opened Jul 27, 2025
TokenSink trait forces interior mutability/RefCell usage Open

Difficulty 5/5 Over a week Newbie friendliness 32/100

servo/html5ever#642 · 2 comments · Opened Jul 13, 2025
Plan for encoding/simpler prefetching in html5ever Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

servo/html5ever#617 · 3 comments · 1 reaction · Opened Jun 11, 2025
Invalid HTML produces duplicated elements Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

servo/html5ever#588 · 2 comments · Opened Mar 27, 2025
parse_html adds unwanted tags like <html><head>...<body></html> Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#583 · 12 comments · Opened Mar 13, 2025
xmlns-prefixed attribute on root element is lost Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

servo/html5ever#569 · 17 comments · 1 reaction · Opened Jan 12, 2025
`RcDom` issues in `html2html` example Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#555 · 3 comments · 16 reactions · Opened Sep 28, 2024
Profile-Guided Optimization (PGO) benchmark result Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

servo/html5ever#545 · Opened Jun 21, 2024
Are there callbacks when processing closed labels？ Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

servo/html5ever#543 · 5 comments · 2 reactions · Opened Jun 20, 2024
Malformed HTML parsed differently from browsers Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#512 · 1 comment · Opened Oct 1, 2023
HTML Entities cause split after the next character Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

servo/html5ever#511 · 4 comments · Opened Sep 29, 2023
Using html5ever in wasm package for an isomorphic html sanitizer Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

servo/html5ever#497 · 3 comments · Opened May 6, 2023
`html5ever::tokenizer::Tokenizer::process_token_and_continue` needs to go away Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#496 · 3 comments · Opened Apr 11, 2023
Does it supply line&column numbers for the parsed tokens? Open

question

Difficulty 5/5 Over a week Newbie friendliness 20/100

servo/html5ever#492 · 7 comments · 2 reactions · Opened Jan 17, 2023
Make async ergonomics nicer. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#478 · 1 comment · 3 reactions · Opened Jul 6, 2022
bug: cargo doesn't know how to resolve dependencies for print-rcdom Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#477 · 1 comment · Opened Jun 10, 2022
Update `xml5ever/README.md` to reflect current API documentation Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

servo/html5ever#452 · 1 comment · Opened Oct 10, 2021
Add Description to what stuff does in `html5ever/examples/*` Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

servo/html5ever#451 · Opened Oct 10, 2021
Tendril: List of things that would need to be done to remove the warning? Open

tendril

Difficulty 5/5 Over a week Newbie friendliness 20/100

servo/html5ever#673 · 4 comments · Opened Aug 5, 2021
Plans for `Sync` tendrils? Open

tendril

Difficulty 2/5 1-3 hours Newbie friendliness 32/100

servo/html5ever#674 · 3 comments · Opened Jun 12, 2021
Replacing NodeRef with it's child Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

servo/html5ever#433 · Opened Feb 2, 2021
TreeSink requires `Tendril<UTF8, NonAtomic>`? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

servo/html5ever#430 · 2 comments · Opened Jan 4, 2021
LibXML2 bindings for html5ever Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

servo/html5ever#423 · 4 comments · Opened Jun 25, 2020
Configurable memory limit Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

servo/html5ever#420 · 6 comments · Opened Jun 13, 2020
rcdom's node's destructor clears all children for nodes that can have strong references outside of the tree Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

servo/html5ever#410 · 5 comments · Opened Jan 24, 2020
Upgrading instructions for 0.25 Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

servo/html5ever#407 · 5 comments · 6 reactions · Opened Dec 19, 2019
TendrilSink::ReadFrom should only use uninitialized bytes for Files Open

tendril

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#675 · Opened Aug 30, 2019
Creating attribute not recognized by local_name!() Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

servo/html5ever#369 · 7 comments · Opened Mar 20, 2019
Implement full XML serialization for nodes Open

E-less easy XML

Difficulty 5/5 Over a week Newbie friendliness 25/100

servo/html5ever#368 · 6 comments · 2 reactions · Opened Mar 18, 2019
docs/example of searching and modifying the dom Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

servo/html5ever#363 · 6 comments · Opened Mar 7, 2019
thread 'main' panicked at 'assertion failed: c.is_some()' Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#351 · 1 comment · Opened Oct 7, 2018
Improving h5e/x5e extension story Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

servo/html5ever#325 · Opened Nov 3, 2017
Stripping of bad input Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

servo/html5ever#301 · 1 comment · Opened Aug 16, 2017
XML5: incentive well-formed XHTML5: Output parsing errors on demand & provide best processing time for flawless code Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

servo/html5ever#294 · 9 comments · Opened Aug 2, 2017
Segmentation fault on extremely pathological input Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

servo/html5ever#290 · 6 comments · 2 reactions · Opened Jul 31, 2017
Avoid taking more than O(n) time even for malicious input Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

servo/html5ever#289 · 7 comments · 1 reaction · Opened Jul 30, 2017
html5ever is much slower than MyHTML Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

servo/html5ever#286 · 32 comments · 1 reaction · Opened Jul 3, 2017
Remove complete_script method from TreeSink trait Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

servo/html5ever#276 · 1 comment · Opened Jun 13, 2017
Implement From<&str> for Tendril Open

tendril

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

servo/html5ever#676 · 4 comments · Opened Jun 13, 2017
Add XML fragment parsing to xml5ever Open

XML

Difficulty 4/5 3-5 days Newbie friendliness 45/100

servo/html5ever#271 · 12 comments · 1 reaction · Opened May 5, 2017
Reduce warning spam Open

servo/html5ever#219 · 6 comments · 3 reactions · 1 assignee · Opened Oct 17, 2016
Add a method in TreeSink trait which will be called when an element ends Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

servo/html5ever#149 · 12 comments · 1 reaction · Opened Jul 13, 2015
Serialize unrecognized namespaces according to the prefix used Open

priority-low XML

Difficulty 4/5 3-5 days Newbie friendliness 30/100

servo/html5ever#122 · 3 comments · Opened Apr 6, 2015
Implement parsing of scripts in SVG Open

priority-low web-compat XML

Difficulty 5/5 Over a week Newbie friendliness 20/100

servo/html5ever#118 · 1 comment · Opened Apr 4, 2015

servo/html5ever

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