Update docs for v4

Author: slowcheetah

docs/web/docs/engines.md

@@ -1,9 +1,20 @@
 # Supported engines and compatibility data
 
-`core-js` tries to support all possible JS engines and environments with ES3 support. Some features have a higher lower bar - for example, *some* accessors can properly work only from ES5, promises require a way to set a microtask or a task, etc.
+Starting from version 4, `core-js` drops support for ancient engines and focuses on environments with at least IE11-level JavaScript features (approximately ES5 + some additions). Older platforms - such as IE10 and below, Android 4.4.3 and below, PhantomJS, Opera Presto, and similar legacy engines - are no longer supported. If you still need to support such legacy browsers, please continue using `core-js` version 3.
 
-However, I have no possibility to test `core-js` absolutely everywhere - for example, testing in IE7- and some other ancient was stopped. The list of definitely supported engines you can see in the compatibility table by the link below. [Write](https://github.com/zloirock/core-js/issues) if you have issues or questions with the support of any engine.
+The baseline is engines about IE11, ES5 with some additions:
+- Basic `WeakMap` support (no matter bugs, for internal usage only, in polyfills could be fixed)
+- Basic `Map` and `Set` support (no matter bugs, for internal usage only, in polyfills could be fixed or completely replaced)
+- Basic `%TypedArray%`, `ArrayBuffer` and `DataView` constructors support (no matter bugs, in polyfills could be fixed)
+- A way setting of a prototype - `Object.setPrototypeOf` or `__proto__`
 
-`core-js` project provides (as [`core-js-compat`](https://github.com/zloirock/core-js/tree/master/packages/core-js-compat) package) all required data about the necessity of `core-js` modules, entry points, and tools for work with it - it's useful for integration with tools like `babel` or `swc`. If you wanna help, you could take a look at the related section of [`CONTRIBUTING`](contributing#h-how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](http://zloirock.github.io/core-js/master/compat/), the example:
+Examples of supported engines:
+- IE11
+- Chrome 38
+- Safari 7.1
+- FF15
+- Node 0.11
+
+`core-js` provides (as [`@core-js/compat`](https://github.com/zloirock/core-js/tree/v4/packages/core-js-compat) package) all required data about the necessity of `core-js` modules, entry points, and tools for work with it - it's useful for integration with tools like `babel` or `swc`. If you wanna help, you could take a look at the related section of [`CONTRIBUTING`](contributing#h-how-to-update-core-js-compat-data). The visualization of compatibility data and the browser tests runner is available [here](http://zloirock.github.io/core-js/v4/compat/), the example:
 
 ![compat-table](https://user-images.githubusercontent.com/2213682/217452234-ccdcfc5a-c7d3-40d1-ab3f-86902315b8c3.png)

docs/web/docs/features/ecmascript/array.md

@@ -1,7 +1,7 @@
 # ECMAScript: Array
 
 ## Modules 
-[`es.array.from`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.from.js), [`es.array.from-async`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.from-async.js), [`es.array.is-array`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.is-array.js), [`es.array.of`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.of.js), [`es.array.copy-within`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.copy-within.js), [`es.array.fill`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.fill.js), [`es.array.find`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.find.js), [`es.array.find-index`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.find-index.js), [`es.array.find-last`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.find-last.js), [`es.array.find-last-index`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.find-last-index.js), [`es.array.iterator`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.iterator.js), [`es.array.includes`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.includes.js), [`es.array.push`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.push.js), [`es.array.slice`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.slice.js), [`es.array.join`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.join.js), [`es.array.unshift`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.unshift.js), [`es.array.index-of`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.index-of.js), [`es.array.last-index-of`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.last-index-of.js), [`es.array.every`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.every.js), [`es.array.some`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.some.js), [`es.array.for-each`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.for-each.js), [`es.array.map`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.map.js), [`es.array.filter`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.filter.js), [`es.array.reduce`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.reduce.js), [`es.array.reduce-right`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.reduce-right.js), [`es.array.reverse`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.reverse.js), [`es.array.sort`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.sort.js), [`es.array.flat`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.flat.js), [`es.array.flat-map`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.flat-map.js), [`es.array.unscopables.flat`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.unscopables.flat.js), [`es.array.unscopables.flat-map`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.unscopables.flat-map.js), [`es.array.at`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.at.js), [`es.array.to-reversed`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.to-reversed.js), [`es.array.to-sorted`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.to-sorted.js), [`es.array.to-spliced`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.to-spliced.js), [`es.array.with`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/es.array.with.js).
+[`es.array.from`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.from.js), [`es.array.from-async`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.from-async.js), [`es.array.of`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.of.js), [`es.array.copy-within`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.copy-within.js), [`es.array.fill`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.fill.js), [`es.array.find`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.find.js), [`es.array.find-index`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.find-index.js), [`es.array.find-last`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.find-last.js), [`es.array.find-last-index`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.find-last-index.js), [`es.array.iterator`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.iterator.js), [`es.array.includes`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.includes.js), [`es.array.push`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.push.js), [`es.array.slice`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.slice.js), [`es.array.join`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.join.js), [`es.array.unshift`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.unshift.js), [`es.array.index-of`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.index-of.js), [`es.array.last-index-of`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.last-index-of.js), [`es.array.map`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.map.js), [`es.array.filter`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.filter.js), [`es.array.reduce`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.reduce.js), [`es.array.reduce-right`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.reduce-right.js), [`es.array.reverse`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.reverse.js), [`es.array.sort`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.sort.js), [`es.array.flat`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.flat.js), [`es.array.flat-map`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.flat-map.js), [`es.array.unscopables.flat`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.unscopables.flat.js), [`es.array.unscopables.flat-map`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.unscopables.flat-map.js), [`es.array.at`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.at.js), [`es.array.to-reversed`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.to-reversed.js), [`es.array.to-sorted`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.to-sorted.js), [`es.array.to-spliced`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.to-spliced.js), [`es.array.with`](https://github.com/zloirock/core-js/blob/v4/packages/core-js/modules/es.array.with.js).
 
 ## Built-ins signatures
 ```ts
@@ -10,7 +10,6 @@ class Array {
   concat(...args: Array<mixed>): Array<mixed>; // with adding support of @@isConcatSpreadable and @@species
   copyWithin(target: number, start: number, end?: number): this;
   entries(): Iterator<[index, value]>;
-  every(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): boolean;
   fill(value: any, start?: number, end?: number): this;
   filter(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): Array<mixed>; // with adding support of @@species
   find(callbackfn: (value: any, index: number, target: any) => boolean), thisArg?: any): any;
@@ -19,7 +18,6 @@ class Array {
   findLastIndex(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): uint;
   flat(depthArg?: number = 1): Array<mixed>;
   flatMap(mapFn: (value: any, index: number, target: any) => any, thisArg: any): Array<mixed>;
-  forEach(callbackfn: (value: any, index: number, target: any) => void, thisArg?: any): void;
   includes(searchElement: any, from?: number): boolean;
   indexOf(searchElement: any, from?: number): number;
   join(separator: string = ','): string;
@@ -32,7 +30,6 @@ class Array {
   reverse(): this; // Safari 12.0 bug fix
   slice(start?: number, end?: number): Array<mixed>; // with adding support of @@species
   splice(start?: number, deleteCount?: number, ...items: Array<mixed>): Array<mixed>; // with adding support of @@species
-  some(callbackfn: (value: any, index: number, target: any) => boolean, thisArg?: any): boolean;
   sort(comparefn?: (a: any, b: any) => number): this; // with modern behavior like stable sort
   toReversed(): Array<mixed>;
   toSpliced(start?: number, deleteCount?: number, ...items: Array<mixed>): Array<mixed>;
@@ -44,7 +41,6 @@ class Array {
   @@unscopables: { [newMethodNames: string]: true };
   static from(items: Iterable | ArrayLike, mapFn?: (value: any, index: number) => any, thisArg?: any): Array<mixed>;
   static fromAsync(asyncItems: AsyncIterable | Iterable | ArrayLike, mapfn?: (value: any, index: number) => any, thisArg?: any): Array;
-  static isArray(value: any): boolean;
   static of(...args: Array<mixed>): Array<mixed>;
 }
 
@@ -59,42 +55,38 @@ core-js(-pure)/es|stable|actual|full/array
 core-js(-pure)/es|stable|actual|full/array/from
 core-js(-pure)/es|stable|actual|full/array/from-async
 core-js(-pure)/es|stable|actual|full/array/of
-core-js(-pure)/es|stable|actual|full/array/is-array
-core-js(-pure)/es|stable|actual|full/array(/virtual)/at
-core-js(-pure)/es|stable|actual|full/array(/virtual)/concat
-core-js(-pure)/es|stable|actual|full/array(/virtual)/copy-within
-core-js(-pure)/es|stable|actual|full/array(/virtual)/entries
-core-js(-pure)/es|stable|actual|full/array(/virtual)/every
-core-js(-pure)/es|stable|actual|full/array(/virtual)/fill
-core-js(-pure)/es|stable|actual|full/array(/virtual)/filter
-core-js(-pure)/es|stable|actual|full/array(/virtual)/find
-core-js(-pure)/es|stable|actual|full/array(/virtual)/find-index
-core-js(-pure)/es|stable|actual|full/array(/virtual)/find-last
-core-js(-pure)/es|stable|actual|full/array(/virtual)/find-last-index
-core-js(-pure)/es|stable|actual|full/array(/virtual)/flat
-core-js(-pure)/es|stable|actual|full/array(/virtual)/flat-map
-core-js(-pure)/es|stable|actual|full/array(/virtual)/for-each
-core-js(-pure)/es|stable|actual|full/array(/virtual)/includes
-core-js(-pure)/es|stable|actual|full/array(/virtual)/index-of
-core-js(-pure)/es|stable|actual|full/array(/virtual)/iterator
-core-js(-pure)/es|stable|actual|full/array(/virtual)/join
-core-js(-pure)/es|stable|actual|full/array(/virtual)/keys
-core-js(-pure)/es|stable|actual|full/array(/virtual)/last-index-of
-core-js(-pure)/es|stable|actual|full/array(/virtual)/map
-core-js(-pure)/es|stable|actual|full/array(/virtual)/push
-core-js(-pure)/es|stable|actual|full/array(/virtual)/reduce
-core-js(-pure)/es|stable|actual|full/array(/virtual)/reduce-right
-core-js(-pure)/es|stable|actual|full/array(/virtual)/reverse
-core-js(-pure)/es|stable|actual|full/array(/virtual)/slice
-core-js(-pure)/es|stable|actual|full/array(/virtual)/some
-core-js(-pure)/es|stable|actual|full/array(/virtual)/sort
-core-js(-pure)/es|stable|actual|full/array(/virtual)/splice
-core-js(-pure)/es|stable|actual|full/array(/virtual)/to-reversed
-core-js(-pure)/es|stable|actual|full/array(/virtual)/to-sorted
-core-js(-pure)/es|stable|actual|full/array(/virtual)/to-spliced
-core-js(-pure)/es|stable|actual|full/array(/virtual)/unshift
-core-js(-pure)/es|stable|actual|full/array(/virtual)/values
-core-js(-pure)/es|stable|actual|full/array(/virtual)/with
+core-js(-pure)/es|stable|actual|full/array(/prototype)/at
+core-js(-pure)/es|stable|actual|full/array(/prototype)/concat
+core-js(-pure)/es|stable|actual|full/array(/prototype)/copy-within
+core-js(-pure)/es|stable|actual|full/array(/prototype)/entries
+core-js(-pure)/es|stable|actual|full/array(/prototype)/fill
+core-js(-pure)/es|stable|actual|full/array(/prototype)/filter
+core-js(-pure)/es|stable|actual|full/array(/prototype)/find
+core-js(-pure)/es|stable|actual|full/array(/prototype)/find-index
+core-js(-pure)/es|stable|actual|full/array(/prototype)/find-last
+core-js(-pure)/es|stable|actual|full/array(/prototype)/find-last-index
+core-js(-pure)/es|stable|actual|full/array(/prototype)/flat
+core-js(-pure)/es|stable|actual|full/array(/prototype)/flat-map
+core-js(-pure)/es|stable|actual|full/array(/prototype)/includes
+core-js(-pure)/es|stable|actual|full/array(/prototype)/index-of
+core-js(-pure)/es|stable|actual|full/array(/prototype)/iterator
+core-js(-pure)/es|stable|actual|full/array(/prototype)/join
+core-js(-pure)/es|stable|actual|full/array(/prototype)/keys
+core-js(-pure)/es|stable|actual|full/array(/prototype)/last-index-of
+core-js(-pure)/es|stable|actual|full/array(/prototype)/map
+core-js(-pure)/es|stable|actual|full/array(/prototype)/push
+core-js(-pure)/es|stable|actual|full/array(/prototype)/reduce
+core-js(-pure)/es|stable|actual|full/array(/prototype)/reduce-right
+core-js(-pure)/es|stable|actual|full/array(/prototype)/reverse
+core-js(-pure)/es|stable|actual|full/array(/prototype)/slice
+core-js(-pure)/es|stable|actual|full/array(/prototype)/sort
+core-js(-pure)/es|stable|actual|full/array(/prototype)/splice
+core-js(-pure)/es|stable|actual|full/array(/prototype)/to-reversed
+core-js(-pure)/es|stable|actual|full/array(/prototype)/to-sorted
+core-js(-pure)/es|stable|actual|full/array(/prototype)/to-spliced
+core-js(-pure)/es|stable|actual|full/array(/prototype)/unshift
+core-js(-pure)/es|stable|actual|full/array(/prototype)/values
+core-js(-pure)/es|stable|actual|full/array(/prototype)/with
 ```
 
 ## Examples