polyfill-library

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URL: Constructor should throw error if URL cannot be parsed

1

**[type]**: Bug report ## What The `URL` polyfill constructor should throw an error if passed an invalid URL. ```js new URL( 'invalid' ); // Expected: Uncaught TypeError: Failed to construct...

aduth

A feature request ## What A polyfill for [`HTMLElement​.check​Validity()`](https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement/checkValidity) for IE9 ## Details Form validation can be complex but using this native API makes it a breeze. I came across...

jabranr

## What [`window.customElements`](https://developer.mozilla.org/en-US/docs/Web/API/Window/customElements) ## Details [`customElements` has shipped in all major browsers except Edge](https://caniuse.com/#search=customElements), but support only goes back a year or two in the other browsers. Custom elements are...

TehShrike

Feature Request: EventTarget Polyfill

2

## What Adding a polyfill for `EventTarget` constructor, an EventEmitter for Javascript objects (e.g. for CustomElements or every other object), as a counterpart to DOM events. ## Details I stumbled...

RiZKiT

Feature request: Element innerHTML for IE11

4

I recently found out that IE11 has HTMLElement innerHTML get and set: ``` Object.getOwnPropertyDescriptor( HTMLElement.prototype, 'innerHTML' ); ``` but not Element.prototype: https://developer.mozilla.org/en-US/docs/Web/API/Element/innerHTML

kapouer

The blob polyfill is rather outdated. Missing File/FileReader and some other monkey patches to XHR to send blobs. most of it maybe is irrelevant nowadays when browser have had time...

jimmywarting

The Symbol polyfill defines all Symbols on the [object prototype](https://github.com/Financial-Times/polyfill-service/blob/master/packages/polyfill-library/polyfills/Symbol/polyfill.js#L103), which causes unexpected results. ```js // returns true with polyfill.io using features=Symbol.iterator, should be false console.log(Symbol.iterator in {}); ``` [Angular](https://github.com/angular/angular/blob/master/packages/core/src/change_detection/change_detection_util.ts#L82)...

hotforfeature

TypeError: Invalid descriptor for property '__
symbol:toStringTag0....'

3

## What Bug Report ## Details I don't have any idea where this bug is being occurred, but my issue reporting tool keep reporting this kind of issue, only in...

rokoroku

Plans for adding new event options (capture, passive, and once)

7

Hi! Wondering if there are any plans to add new event options (`capture`, `passive`, and `once`). If not, I would be interested in contributing or working with developers to add...

robwierzbowski

Support FormData polyfill

2

There are many common scenarios for raising issues against the polyfill service. Is your issue one of these? * Please add polyfill FormData

janryWang