If the document.domain property is set in the page, _has module throws error "Access is denied" when try to check window's property for example 'hasOwnProperty'.

So I think it is better to change _has module like below.

var hasOwnProperty = {}.hasOwnProperty;
module.exports = function(it, key){
  try {
    return hasOwnProperty.call(it, key);
  } catch(e){
    return 

https://developers.google.com/web/updates/2017/09/abortable-fetch

Currently it is only implemented in Firefox 57 and is coming to other browsers soon.

const controller = new AbortController();
const signal = controller.signal;

setTimeout(() => controller.abort(), 5000);

fetch(url, { signal }).then(response => {
  return response.text();
}).then(text => {
  console.lo

The readme says

It's recommended to use this library in the form of a ponyfill, which doesn't inflict modifications of the global object.

The index.js file of the project does the ponyfill work already. Telling us to use the library in the form of a ponyfill is misleading, it should say something like "Th

Documented in this spec: https://drafts.csswg.org/css-scroll-snap-1/#propdef-scroll-margin

This is how it'll be possible to set custom offsets without reimplementing the default scrolling behavior or changing the HTML structure to add wrapping elements with padding to accomplish the same thing.

https://www.w3.org/TR/resize-observer-1/

Mp3MediaRecorderconstructor has following signature:

constructor(stream: MediaStream, options?: { audioContext?: AudioContext });

where the user of the library has the possibility to pass in their own audioContext.

This should be documented in the README.