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kitabcitab/node_modules/core-js-pure/internals/to-index.js

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+var toIntegerOrInfinity = require('../internals/to-integer-or-infinity');
+var toLength = require('../internals/to-length');
+
+var $RangeError = RangeError;
+
+// `ToIndex` abstract operation
+// https://tc39.es/ecma262/#sec-toindex
+module.exports = function (it) {
+  if (it === undefined) return 0;
+  var number = toIntegerOrInfinity(it);
+  var length = toLength(number);
+  if (number !== length) throw $RangeError('Wrong length or index');
+  return length;
+};