polyfills

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polyfills error

1

### Description i use polyfills with npm step 1： npm install @webcomponents/webcomponentsjs step 2: add script then i got the error: Uncaught SyntaxError: Unexpected token '

sanqi-med

[scoped-custom-element-registry] : Issue with sourcemaps

3

### Description In a stock, non-ejected, `create-react-app` scaffolded application, using the `@webcomponents/scoped-custom-element-registry` polyfill package results in sourcemap warnings during the build step potentially caused by the sourcemaps being malformed? ###...

michaelwarren1106

[scoped-custom-element-registry]: Support for JSDOM (Jest)

2

## Description Please consider altering the polyfill to keep JSDOM's global `customElements` registry intact. This particular instance also includes some _internal bookkeeping the headless browser uses. Swapping it out completely...

riovir

Use Object.defineProperty instead direct define when create polyfilled HTMLCollection

7

Direct define would cause enumerable issue. This behavior may break some js lib. ```js Object.keys(document.querySelectorAll('body')); // 0, item, namedItem var buttons = document.querySelectorAll('button'); Object.keys(buttons).forEach(function(i) { var button = buttons[i]; button.addEventListener(/*...*/);...

louielin

Bumps [moment](https://github.com/moment/moment) to 2.29.4 and updates ancestor dependency [rollup-plugin-license](https://github.com/mjeanroy/rollup-plugin-license). These dependencies need to be updated together. Updates `moment` from 2.23.0 to 2.29.4 Changelog Sourced from moment's changelog. 2.29.4 Release Jul...

dependabot[bot]

[ShadyCSS] Parse and flatten nested calc()

2

### Reference Issue https://github.com/webcomponents/polyfills/issues/8 Migrated from: https://github.com/webcomponents/shadycss/pull/242 #### Original description: This PR adds a minimal CSS calc() parser strictly for flattening nested calc() expressions which may be the result of...

wessberg

[ShadyCSS] Re-declaring same custom CSS property crashes IE11

3

### Description We have this CSS configuring custom CSS properties for a component: ```css :host([theme~="xlarge"]) { --vaadin-avatar-group-overlap: 12px; --vaadin-avatar-group-overlap-border: 3px; } :host([theme~="large"]) { --vaadin-avatar-group-overlap: 10px; --vaadin-avatar-group-overlap-border: 3px; } :host([theme~="small"]) {...

web-padawan

[WCJS] document.write does not work when webcomponents-loader.js is loaded asynchronously

4

### Description If `webcomponents-loader.js` is loaded asynchronously, but runs while `document.readyState` is still `loading`, then it fails to load the polyfills. #### Steps to Reproduce 1. Load the `webcomponents-loader.js` script...

bschlenk

Migrate the `formdata` event polyfill's tests to WTR.

2

This PR is very similar to #509. That PR already set up WTR within the repo and this package doesn't have anything fancy going on in its tests, so this...

bicknellr

[infra] Migrate all tests to `@web/test-runner`

1

We should migrate the tests from WCT to WTR. - [x] - [ ] - [ ] [add others here]

bicknellr