esnext

Author: uhyo

build/replacement.ts

@@ -44,4 +44,6 @@ export const replacement = new Map([
   ["lib.es2018.asyncgenerator.d.ts", new Set(["AsyncGenerator"])],
   ["lib.es2018.asynciterable.d.ts", new Set(["AsyncIterator"])],
   ["lib.es2019.object.d.ts", new Set(["ObjectConstructor"])],
+  ["lib.esnext.promise.d.ts", new Set(["AggregateError"])],
+  ["lib.esnext.string.d.ts", new Set(["String"])],
 ]);

lib/lib.esnext.promise.d.ts

@@ -0,0 +1,7 @@
+/// <reference no-default-lib="true"/>
+
+interface AggregateError extends Error {
+  errors: unknown[];
+}
+
+declare var AggregateError: AggregateErrorConstructor;

lib/lib.esnext.string.d.ts

@@ -0,0 +1,21 @@
+/// <reference no-default-lib="true"/>
+
+interface String {
+  /**
+   * Replace all instances of a substring in a string, using a regular expression or search string.
+   * @param searchValue A string to search for.
+   * @param replaceValue A string containing the text to replace for every successful match of searchValue in this string.
+   */
+  replaceAll(searchValue: string | RegExp, replaceValue: string): string;
+
+  /**
+   * Replace all instances of a substring in a string, using a regular expression or search string.
+   * @param searchValue A string to search for.
+   * @param replacer A function that returns the replacement text.
+   */
+  replaceAll(
+    searchValue: string | RegExp,
+    // TODO: possible improvement in TS4.2
+    replacer: (substring: string, ...args: (string | number)[]) => string
+  ): string;
+}

tests/esnext.promise.ts

@@ -0,0 +1,9 @@
+/// <reference path="../dist/lib/lib.esnext.d.ts" />
+
+import { expectType } from "tsd";
+
+// AggregateError
+{
+  const e = new AggregateError([1, 2, 3]);
+  expectType<unknown[]>(e.errors);
+}

tests/esnext.string.ts

@@ -0,0 +1,11 @@
+/// <reference path="../dist/lib/lib.esnext.d.ts" />
+
+import { expectType } from "tsd";
+
+// String
+"foobar".replaceAll(/foo/g, (substr, p1, p2) => {
+  expectType<string>(substr);
+  expectType<string | number>(p1);
+  expectType<string | number>(p2);
+  return "";
+});