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lit

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lit
Lit is a simple library for building fast, lightweight web components.

TypeScript · 21826 stars
lit.dev
The Lit website

TypeScript · 142 stars
video-series-samples

TypeScript · 6 stars

Beginner friendly Everything

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Improve built-in generic directives type signature Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

lit/lit#5190 · Opened Dec 24, 2025
Easier debugging of hydration mismatch Open

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

lit/lit#5170 · Opened Dec 5, 2025
@lit-labs/rollup-plugin-minify-html-literals shows errors with HTML comments Open

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

lit/lit#5159 · Opened Nov 10, 2025
[Lit - Onboarding] Publish Project Charter on website or GitHub (see charter template) Open

OpenJS Onboarding

lit/lit#5140 · 2 comments · 2 assignees · Opened Oct 24, 2025
[Lit - Onboarding] Identify and document other core project infrastructure Open

OpenJS Onboarding

lit/lit#5136 · 4 comments · 2 assignees · Opened Oct 24, 2025
[ONBOARDING] Lit to OpenJS Open

OpenJS Onboarding

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

lit/lit#5132 · 3 comments · 2 reactions · Opened Oct 24, 2025
[labs/ssr] Support `litNonce` with SSR Open

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

lit/lit#5130 · Opened Oct 23, 2025
@lit/localize-tools does not support TypeScript >= 5.6.0 Open

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

lit/lit#5122 · 1 comment · 1 reaction · Opened Oct 16, 2025
Signals documentation: mention/explain `signal()` and `computed()` Open

Difficulty 2/5 1-3 hours Newbie friendliness 58/100

lit/lit.dev#1441 · Opened Oct 15, 2025
[context] poor performance with tree of providers and consumers using same context Open

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

lit/lit#5116 · Opened Oct 9, 2025
Bug in `lit-element-hydrate-support.ts`, mutation of NamedNodeMap Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

lit/lit#5114 · 3 reactions · Opened Oct 9, 2025
'labs mcp' is not an available command. Open

lit/lit#5112 · 2 comments · 1 reaction · 1 assignee · Opened Oct 6, 2025
Possible bug in how Lit applies changes to properties depending on their type Open

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

lit/lit#5109 · 3 comments · Opened Sep 30, 2025
Add a template directive for rendering <template> elements Open

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

lit/lit#5108 · 2 comments · Opened Sep 29, 2025
@property option for runtime schema validation Open

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

lit/lit#5102 · Opened Sep 20, 2025
Error: Unexpected error Open

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

lit/lit.dev#1434 · 1 comment · Opened Sep 16, 2025
[labs/tsserver][labs/eslint-plugin] Diagnostics and lint rules to implement Open

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

lit/lit#5096 · 5 reactions · Opened Sep 15, 2025
@lit-labs/ssr and style Open

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

lit/lit#5095 · Opened Sep 13, 2025
The data of Lit localization files should be pure json Open

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

lit/lit#5091 · Opened Sep 9, 2025
lit-localize shouldn't be destructive, unused translations should be marked Open

Needs Discussion

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

lit/lit#5089 · 6 comments · Opened Sep 8, 2025
Add validate method to `lit-localize` so that missing tranlsations can be caught before release Open

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

lit/lit#5084 · Opened Sep 3, 2025
Add group context to xliff files so that software can show source code references Open

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

lit/lit#5083 · 1 reaction · Opened Sep 3, 2025
[labs/router] dynamic routing as per the docs doesn't work Open

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

lit/lit#5079 · 1 comment · Opened Aug 30, 2025
Error this._$EM is not a function when navigating between App Router and Page Router in Next.js with Lit SSR Open

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

lit/lit#5078 · 2 comments · Opened Aug 30, 2025
[labs/observers] Make it easier to observe dynamic elements Open

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

lit/lit#5077 · Opened Aug 30, 2025
Support configurable caches Open

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

lit/lit#5073 · 3 comments · Opened Aug 29, 2025
Add bundling section to publishing guide Open

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

lit/lit.dev#1431 · Opened Aug 22, 2025
[labs/tsserver-plugin] language service support Open

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

lit/lit#5047 · Opened Aug 21, 2025
@lit-labs/nextjs renders only on client side in Windows (works fine on macOS) Open

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

lit/lit#5046 · 5 comments · Opened Aug 21, 2025
Playground Motion "Todos List Transitions" is broken Open

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

lit/lit.dev#1429 · 1 comment · Opened Aug 21, 2025
[labs/eleventy-plugin-lit] VM tests are failing on GitHub actions Open

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

lit/lit#5043 · Opened Aug 20, 2025
[lit-html] lit cannot render HTML template elements Open

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

lit/lit#5033 · 5 comments · Opened Aug 7, 2025
Error: Unexpected error Open

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

lit/lit.dev#1428 · 1 comment · Opened Aug 4, 2025
[labs/ssr] HTML comments processed as HTML Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

lit/lit#5022 · 1 reaction · Opened Jul 21, 2025
Provide llms.txt and llms-full.txt on the doc site Open

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

lit/lit.dev#1423 · 1 reaction · Opened Jun 27, 2025
[@lit/localize] A translation of "2 > 1" results in "2 > 1" when using `msg("2 > 1")` Open

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

lit/lit#5012 · 1 comment · Opened Jun 16, 2025
removePart() and repeat directive causes dangling comment markers Open

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

lit/lit#5010 · 1 comment · 1 reaction · Opened Jun 13, 2025
Wrapper triggers the setter on each re-render Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

lit/lit#5009 · 3 comments · Opened Jun 9, 2025
[@lit-labs/virtualizer] use bigint to calculate `min-height` and `transform` Open

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

lit/lit#5008 · Opened Jun 5, 2025
[lit-html] warn when binding primitive values into element position Open

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

lit/lit#5007 · Opened Jun 3, 2025
[labs/virtualizer] Improve scroll performance - high scroll velocity causes UI lag Open

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

lit/lit#5006 · Opened Jun 2, 2025
@tanstack/lit-query needs maintainer Open

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

lit/lit#4995 · 5 reactions · Opened May 21, 2025
@astrojs/lit needs maintainer Open

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

lit/lit#4994 · 2 comments · 1 reaction · Opened May 21, 2025
[labs/ssr] After the initial load, if I reload my Next.js application, the web components are shallowly rendered, causing hydration issues in Next.js. Open

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

lit/lit#4992 · 4 comments · Opened May 20, 2025
[labs/ssr-react] guard against `enable-lit-ssr.js` wrapping createElement multiple times Open

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

lit/lit#4986 · 2 comments · Opened May 9, 2025
perf: drop runtime type checking from production builds Open

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

lit/lit#4985 · 3 reactions · Opened May 9, 2025
selectionchange event listener on input in Chrome Open

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

lit/lit#4983 · 1 comment · Opened May 2, 2025
[labs/virtualizer] `message` can be `null` in `isResizeObserverLoopErrorMessage` Open

Difficulty 2/5 1-3 hours Newbie friendliness 48/100

lit/lit#4982 · Opened May 1, 2025
When I import it in a webcomponent, rangeChanged always returns -1, -1, causing the page to fail to render. Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

lit/lit#4980 · Opened Apr 29, 2025
formStateRestoreCallback not called when contained in lit-element Open

More Info Needed

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

lit/lit#4974 · 3 comments · Opened Apr 14, 2025

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