@babel/helpers

Class handling

This code demonstrates a helper function used by Babel to ensure that a class is only instantiated with the `new` keyword, preventing incorrect usage.

"use strict";\nfunction _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError(\"Cannot call a class as a function\"); } }\nvar MyClass = function MyClass() { _classCallCheck(this, MyClass); };

Spread properties

This helper function is used to emulate the behavior of the object spread operator `{...obj}`, allowing properties from one or more source objects to be copied into a new object.

"use strict";\nfunction _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }\nvar obj = _extends({}, sourceObj, { key: 'value' });