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unbox-primitive

1.1.0
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  • License MIT

Unbox a boxed JS primitive value.

Package Exports

  • unbox-primitive
  • unbox-primitive/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (unbox-primitive) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

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Unbox a boxed JS primitive value. This module works cross-realm/iframe, does not depend on instanceof or mutable properties, and works despite ES6 Symbol.toStringTag.

Example

var unboxPrimitive = require('unbox-primitive');
var assert = require('assert');

assert.equal(unboxPrimitive(new Boolean(false)), false);
assert.equal(unboxPrimitive(new String('f')), 'f');
assert.equal(unboxPrimitive(new Number(42)), 42);
const s = Symbol();
assert.equal(unboxPrimitive(Object(s)), s);
assert.equal(unboxPrimitive(new BigInt(42)), 42n);

// any primitive, or non-boxed-primitive object, will throw

Tests

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