Rewriting Project

1 files changed, 23 insertions, 0 deletions

diff --git a/node_modules/core-js/modules/esnext.string.at-alternative.js b/node_modules/core-js/modules/esnext.string.at-alternative.js
new file mode 100644
index 0000000..5158e2e
--- /dev/null
+++ b/node_modules/core-js/modules/esnext.string.at-alternative.js
@@ -0,0 +1,23 @@
+// TODO: disabled by default because of the conflict with another proposal
+'use strict';
+var $ = require('../internals/export');
+var requireObjectCoercible = require('../internals/require-object-coercible');
+var toLength = require('../internals/to-length');
+var toInteger = require('../internals/to-integer');
+var fails = require('../internals/fails');
+
+var FORCED = fails(function () {
+  return '𠮷'.at(0) !== '\uD842';
+});
+
+// `String.prototype.at` method
+// https://github.com/tc39/proposal-relative-indexing-method
+$({ target: 'String', proto: true, forced: FORCED }, {
+  at: function at(index) {
+    var S = String(requireObjectCoercible(this));
+    var len = toLength(S.length);
+    var relativeIndex = toInteger(index);
+    var k = relativeIndex >= 0 ? relativeIndex : len + relativeIndex;
+    return (k < 0 || k >= len) ? undefined : S.charAt(k);
+  }
+});