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node_modules/core-js/modules/es.promise.finally.js

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+'use strict';
+var $ = require('../internals/export');
+var IS_PURE = require('../internals/is-pure');
+var NativePromiseConstructor = require('../internals/promise-native-constructor');
+var fails = require('../internals/fails');
+var getBuiltIn = require('../internals/get-built-in');
+var isCallable = require('../internals/is-callable');
+var speciesConstructor = require('../internals/species-constructor');
+var promiseResolve = require('../internals/promise-resolve');
+var defineBuiltIn = require('../internals/define-built-in');
+
+var NativePromisePrototype = NativePromiseConstructor && NativePromiseConstructor.prototype;
+
+// Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+var NON_GENERIC = !!NativePromiseConstructor && fails(function () {
+  // eslint-disable-next-line unicorn/no-thenable -- required for testing
+  NativePromisePrototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
+});
+
+// `Promise.prototype.finally` method
+// https://tc39.es/ecma262/#sec-promise.prototype.finally
+$({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
+  'finally': function (onFinally) {
+    var C = speciesConstructor(this, getBuiltIn('Promise'));
+    var isFunction = isCallable(onFinally);
+    return this.then(
+      isFunction ? function (x) {
+        return promiseResolve(C, onFinally()).then(function () { return x; });
+      } : onFinally,
+      isFunction ? function (e) {
+        return promiseResolve(C, onFinally()).then(function () { throw e; });
+      } : onFinally
+    );
+  }
+});
+
+// makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
+if (!IS_PURE && isCallable(NativePromiseConstructor)) {
+  var method = getBuiltIn('Promise').prototype['finally'];
+  if (NativePromisePrototype['finally'] !== method) {
+    defineBuiltIn(NativePromisePrototype, 'finally', method, { unsafe: true });
+  }
+}