graphql
Version:
A Query Language and Runtime which can target any service.
31 lines (30 loc) • 1.01 kB
JavaScript
/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* strict
*/
/**
* The `applyToStringTag()` function checks first to see if the runtime
* supports the `Symbol` class and then if the `Symbol.toStringTag` constant
* is defined as a `Symbol` instance. If both conditions are met, the
* Symbol.toStringTag property is defined as a getter that returns the
* supplied class constructor's name.
*
* @method applyToStringTag
*
* @param {Class<any>} classObject a class such as Object, String, Number but
* typically one of your own creation through the class keyword; `class A {}`,
* for example.
*/
export default function applyToStringTag(classObject) {
if (typeof Symbol === 'function' && Symbol.toStringTag) {
Object.defineProperty(classObject.prototype, Symbol.toStringTag, {
get: function get() {
return this.constructor.name;
}
});
}
}