es-shims/Symbol.prototype.description

Name: Symbol.prototype.description

Owner: ECMAScript Shims

Description: Spec-compliant shim for Symbol.prototype.description proposal.

Created: 2017-07-25 18:42:05.0

Updated: 2017-07-28 16:36:00.0

Pushed: 2018-01-23 22:06:32.0

Homepage: null

Size: 19

Language: JavaScript

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README

Symbol.prototype.description

An ECMAScript spec-compliant Symbol.prototype.description shim. Invoke its “shim” method to shim Symbol.prototype.description if it is unavailable. Note: Symbol#description requires a true ES6 environment, specifically one with native Symbols.

This package implements the es-shim API interface. It works in an ES6-supported environment and complies with the spec.

Most common usage:

description = require('symbol.prototype.description');

rt(description(Symbol('foo')) === 'foo');
rt(description(Symbol()) === undefined);
rt(description(Symbol(undefined)) === undefined);
rt(description(Symbol(null)) === 'null');

ote: this should be the empty string, but in many engines,
t is impossible to distinguish Symbol() and Symbol('')
ithout globally replacing `Symbol`
rt(description(Symbol('')) === undefined);

!Symbol.prototype.description) {
description.shim();


rt(description(Symbol('foo')) === Symbol('foo').description);
rt(description(Symbol()) === Symbol().description);
rt(description(Symbol(undefined)) === Symbol(undefined).description);
rt(description(Symbol(null)) === Symbol(null).description);

rt(Symbol('').description === ''); // this works fine!

Tests

Simply clone the repo, npm install, and run npm test