Rewriting Project

1 files changed, 14 insertions, 0 deletions

diff --git a/node_modules/core-js/internals/to-primitive.js b/node_modules/core-js/internals/to-primitive.js
new file mode 100644
index 0000000..00a4031
--- /dev/null
+++ b/node_modules/core-js/internals/to-primitive.js
@@ -0,0 +1,14 @@
+var isObject = require('../internals/is-object');
+
+// `ToPrimitive` abstract operation
+// https://tc39.github.io/ecma262/#sec-toprimitive
+// instead of the ES6 spec version, we didn't implement @@toPrimitive case
+// and the second argument - flag - preferred type is a string
+module.exports = function (input, PREFERRED_STRING) {
+  if (!isObject(input)) return input;
+  var fn, val;
+  if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
+  if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;
+  if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
+  throw TypeError("Can't convert object to primitive value");
+};