webcomponents/polyfills

Ver en GitHub

Web Components Polyfills

Estrellas: 1.2k
Forks: 168
Issues abiertos para principiantes: 0
Issues indexados: 94

Lenguaje dominante: HTML
Licencia: BSD-3-Clause
Último push a GitHub: 23/2/2026
Última indexación: 15/9/2026
Guía de contribución: Guía de contribución
Código de conducta: Sin código de conducta
Etiquetas para principiantes: Sin etiquetas para principiantes indexadas
Métricas de merge de PR: Sin PR fusionados en 30 d

Abierto Todos

94 issues abiertos indexados

[ShadyCSS] Cannot load the polyfill async Abierto

Package: shadycss Severity: Low Type: Bug wontfix

webcomponents/polyfills#33 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[Custom Elements] `instanceof Function` doesn't work for functions from other realms. Abierto

Package: custom-elements Severity: Medium Type: Bug

webcomponents/polyfills#105 · 11 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[Custom Elements] Custom element not "recognized" when added with Element.outerHTML Abierto

Package: custom-elements Severity: Medium Type: Feature wontfix

webcomponents/polyfills#106 · 5 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
Missing DocumentOrShadowRoot interface implementation Abierto

webcomponents/polyfills#66 · 15 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
[ShadyCSS] Curlies in styles break the preprocessor Abierto

Package: shadycss Severity: Low Type: Bug wontfix

webcomponents/polyfills#28 · 4 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
[Custom Elements] Callback ordering is incorrect for `Node.prototype.replaceChild`. Abierto

Package: custom-elements Severity: Low Type: Bug wontfix

webcomponents/polyfills#107 · 4 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] Expose prepareTemplate for non template DocumentFragments Abierto

Package: shadycss Severity: Medium Type: Feature wontfix

webcomponents/polyfills#26 · 4 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[Custom Elements] Error in IE11: The custom element being constructed was not registered with `customElements`. Abierto

Package: custom-elements Severity: Medium Type: Bug wontfix

webcomponents/polyfills#108 · 11 comentarios · 1 reacción · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] Too specific slotted(*) causes unexpected styling Abierto

Package: shadycss Severity: Medium Type: Bug wontfix

webcomponents/polyfills#24 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] Selectors for slot element does not work Abierto

Package: shadycss Severity: Low Type: Feature wontfix

webcomponents/polyfills#22 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] Specificity issue when mixing straight and module-style CSS Abierto

Package: shadycss Severity: Medium Type: Bug wontfix

webcomponents/polyfills#23 · 4 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] error scoping distributed content Abierto

Package: shadycss Severity: High Type: Bug wontfix

webcomponents/polyfills#20 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] Shadow DOM is not scoped and elements doesn't get `style-scope` when template is cloned after CE definition Abierto

Package: shadycss Package: shadydom Severity: Medium Type: Bug wontfix

webcomponents/polyfills#77 · 4 comentarios · 3 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] Mutation Observer callback is not called for shadow hosts Abierto

Focus Area: Standards & Polyfills Package: shadydom Severity: High Type: Bug wontfix

webcomponents/polyfills#81 · 4 comentarios · 2 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] Integration with Lit/HyperHtml - Dynamic Class Interpolation Abierto

Package: shadycss Severity: Medium Type: Feature wontfix

webcomponents/polyfills#18 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[Custom Elements] Calling `setAttribute` with a non-lower cased attribute name does not trigger `attributeChangedCallback` Abierto

Severity: Medium Type: Bug wontfix

webcomponents/polyfills#110 · 4 comentarios · 2 reacciones · 1 asignado · Indexado el 15/9/2026
[ShadyCSS] How do we clean up? Abierto

Package: shadycss Severity: Medium Type: Feature wontfix

webcomponents/polyfills#15 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[WCJS] Remove `:unresolved` pseudo selector support Abierto

Package: webcomponentsjs Severity: Medium Type: Feature wontfix

webcomponents/polyfills#60 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] :host() selector containing multiple elements extremely slow when first element has a long name Abierto

More Info Needed Package: shadycss wontfix

webcomponents/polyfills#13 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] Provide option to add custom classname for scoping Abierto

Package: shadycss Severity: Low Type: Feature wontfix

webcomponents/polyfills#12 · 4 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] Add a way update insertion points when `preferPerformance` is set to true Abierto

Package: shadydom Severity: Medium Type: Feature wontfix

webcomponents/polyfills#92 · 2 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
[ShadyDOM] HTMLElement ids don't get scoped Abierto

Package: shadydom Severity: Medium Type: Feature wontfix

webcomponents/polyfills#47 · 4 comentarios · 1 reacción · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] dispatchEvent on ShadowRoot throws an exception Abierto

Package: shadydom Severity: High Type: Bug wontfix

webcomponents/polyfills#93 · 2 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
[ShadyDOM] Events dispatched by Light DOM children in connectedCallback cannot be handled Abierto

Package: shadydom Severity: High Type: Bug wontfix

webcomponents/polyfills#94 · 4 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] Edge slots not working if created with uppercase name Abierto

Package: shadydom Severity: Medium Type: Bug wontfix

webcomponents/polyfills#97 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] IE 11 Object doesn't support property or method 'assignedElements' Abierto

Package: shadydom Severity: Medium Type: Feature wontfix

webcomponents/polyfills#46 · 6 comentarios · 7 reacciones · 1 asignado · Indexado el 15/9/2026
[ShadyDOM] Shady DOM breaks angular router in Edge Abierto

Package: shadydom Severity: High Type: Bug wontfix

webcomponents/polyfills#98 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] Polymer.dom(parent).insertBefore(nodeToInsert, refNode) deletes node created by pressing enter key Abierto

Package: shadydom Severity: Medium Type: Bug wontfix

webcomponents/polyfills#101 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[Custom Elements] Finish port of some Custom Elements PRs Abierto

Severity: Medium Type: Feature wontfix

webcomponents/polyfills#138 · 6 comentarios · 1 reacción · 1 asignado · Indexado el 15/9/2026
Multiple calls to `prepareTemplate` don't cascade as expected. Abierto

Package: shadycss wontfix

webcomponents/polyfills#156 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
Implement FormData event Abierto

Epic Focus Area: Standards & Polyfills Severity: Medium Type: Feature

webcomponents/polyfills#172 · 11 comentarios · 9 reacciones · 1 asignado · Indexado el 15/9/2026
shadydom css of one component leaks in other components in Edge18 Abierto

Package: shadycss Package: shadydom Type: Bug wontfix

webcomponents/polyfills#184 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
pollyfill seems to alter jQuery on MSIE11 Abierto

Focus Area: Standards & Polyfills More Info Needed Type: Bug wontfix

webcomponents/polyfills#198 · 3 comentarios · 2 reacciones · 0 asignados · Indexado el 15/9/2026
gecko 48 dispatch 'focus' event but intercept by polyfill Abierto

More Info Needed wontfix

webcomponents/polyfills#227 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyDOM] Allow use of `noPatch` modes without re-ordering polyfills Abierto

Focus Area: Standards & Polyfills Package: shadydom Type: Bug wontfix

webcomponents/polyfills#237 · 2 comentarios · 5 reacciones · 0 asignados · Indexado el 15/9/2026
[URL] URL polyfill isn't compatible with the spec: doesn't throw on partial URLs Abierto

Package: url Type: Feature wontfix

webcomponents/polyfills#241 · 6 comentarios · 2 reacciones · 0 asignados · Indexado el 15/9/2026
_element property on Custom Components breaks CSS Custom Properties Abierto

Focus Area: Standards & Polyfills Type: Bug wontfix

webcomponents/polyfills#245 · 3 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
Setting ShadyDOM settings via `ShadyDOM` object and URL flags are incompatible. Abierto

Focus Area: Standards & Polyfills Package: shadydom Type: Bug wontfix

webcomponents/polyfills#250 · 2 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
[WCJS] document.write does not work when webcomponents-loader.js is loaded asynchronously Abierto

Package: webcomponentsjs Severity: Low Type: Bug wontfix

webcomponents/polyfills#251 · 5 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
[ShadyCSS] App loading performance issue in Chrome <= 45 Abierto

Focus Area: Standards & Polyfills Package: shadycss Severity: Low Type: Maintenance wontfix

webcomponents/polyfills#257 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
failing shadycss scoping-api and disable-runtime tests Abierto

Focus Area: Standards & Polyfills Package: shadycss Severity: Medium Type: Bug wontfix

webcomponents/polyfills#260 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
window.__shady_native_addEventListener is not a function in versions of Chrome and Firefox Abierto

Package: shadydom Type: Bug

webcomponents/polyfills#279 · 10 comentarios · 3 reacciones · 0 asignados · Indexado el 15/9/2026
[Template] If loaded after DOMContentLoaded, templates aren't upgraded Abierto

Package: template Type: Bug wontfix

webcomponents/polyfills#291 · 2 comentarios · 4 reacciones · 1 asignado · Indexado el 15/9/2026
Supporting ie11 and pass style attribute to the element Abierto

Focus Area: Standards & Polyfills Package: shadycss Type: Feature wontfix

webcomponents/polyfills#295 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
Supporting ie11 and inheritance of css variable with slotted components Abierto

Focus Area: Standards & Polyfills Package: shadycss Type: Bug wontfix

webcomponents/polyfills#296 · 4 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
Object doesn't support property or method '__shady_getRootNode' error thrown in Edge by version 2.2.10 and up. Abierto

Focus Area: Standards & Polyfills Package: shadydom Type: Bug wontfix

webcomponents/polyfills#298 · 2 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
Publish shady-css-scoped-element Abierto

Focus Area: Standards & Polyfills Package: shady-css-scoped-element Type: Maintenance wontfix

webcomponents/polyfills#305 · 2 comentarios · 0 reacciones · 0 asignados · Indexado el 15/9/2026
Explainer for Shadow Parts support for native shadow DOM Abierto

Focus Area: Standards & Polyfills Type: Feature wontfix

webcomponents/polyfills#310 · 2 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
Document shadycss limitation of custom properties and slotted children Abierto

Focus Area: Standards & Polyfills Package: shadycss Type: Maintenance wontfix

webcomponents/polyfills#316 · 2 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026
lit/polymer/polyfills uber test script Abierto

Focus Area: Standards & Polyfills Type: Maintenance wontfix

webcomponents/polyfills#317 · 2 comentarios · 0 reacciones · 1 asignado · Indexado el 15/9/2026

webcomponents/polyfills

Recibe los nuevos issues en tu correo