Domovská stránka Prehľadávať Pomoc
Registrovať Prihlásiť sa
prc
/
plc-sim
1
0
Fork 0
Súbory Issues 0 Pull requesty 0 Wiki
Branch: master
Branche Tagy
plc-sim
/
client
/
node_modules
/
which-boxed-primitive
prc b6c02717e6 Upload complete no-internet building environment. 1 rok pred
..
.github b6c02717e6 Upload complete no-internet building environment. 1 rok pred
test b6c02717e6 Upload complete no-internet building environment. 1 rok pred
.editorconfig b6c02717e6 Upload complete no-internet building environment. 1 rok pred
.eslintignore b6c02717e6 Upload complete no-internet building environment. 1 rok pred
.eslintrc b6c02717e6 Upload complete no-internet building environment. 1 rok pred
.nycrc b6c02717e6 Upload complete no-internet building environment. 1 rok pred
CHANGELOG.md b6c02717e6 Upload complete no-internet building environment. 1 rok pred
LICENSE b6c02717e6 Upload complete no-internet building environment. 1 rok pred
README.md b6c02717e6 Upload complete no-internet building environment. 1 rok pred
index.js b6c02717e6 Upload complete no-internet building environment. 1 rok pred
package.json b6c02717e6 Upload complete no-internet building environment. 1 rok pred

README.md

which-boxed-primitive Version Badge

dependency status dev dependency status License Downloads

npm badge

Which kind of boxed JS primitive is this? This module works cross-realm/iframe, does not depend on instanceof or mutable properties, and works despite ES6 Symbol.toStringTag.

Example

var whichBoxedPrimitive = require('which-boxed-primitive');
var assert = require('assert');

// unboxed primitives return `null`
// boxed primitives return the builtin constructor name

assert.equal(whichBoxedPrimitive(undefined), null);
assert.equal(whichBoxedPrimitive(null), null);

assert.equal(whichBoxedPrimitive(false), null);
assert.equal(whichBoxedPrimitive(true), null);
assert.equal(whichBoxedPrimitive(new Boolean(false)), 'Boolean');
assert.equal(whichBoxedPrimitive(new Boolean(true)), 'Boolean');

assert.equal(whichBoxedPrimitive(42), null);
assert.equal(whichBoxedPrimitive(NaN), null);
assert.equal(whichBoxedPrimitive(Infinity), null);
assert.equal(whichBoxedPrimitive(new Number(42)), 'Number');
assert.equal(whichBoxedPrimitive(new Number(NaN)), 'Number');
assert.equal(whichBoxedPrimitive(new Number(Infinity)), 'Number');

assert.equal(whichBoxedPrimitive(''), null);
assert.equal(whichBoxedPrimitive('foo'), null);
assert.equal(whichBoxedPrimitive(new String('')), 'String');
assert.equal(whichBoxedPrimitive(new String('foo')), 'String');

assert.equal(whichBoxedPrimitive(Symbol()), null);
assert.equal(whichBoxedPrimitive(Object(Symbol()), 'Symbol');

assert.equal(whichBoxedPrimitive(42n), null);
assert.equal(whichBoxedPrimitive(Object(42n), 'BigInt');

// non-boxed-primitive objects return `undefined`
assert.equal(whichBoxedPrimitive([]), undefined);
assert.equal(whichBoxedPrimitive({}), undefined);
assert.equal(whichBoxedPrimitive(/a/g), undefined);
assert.equal(whichBoxedPrimitive(new RegExp('a', 'g')), undefined);
assert.equal(whichBoxedPrimitive(new Date()), undefined);
assert.equal(whichBoxedPrimitive(function () {}), undefined);
assert.equal(whichBoxedPrimitive(function* () {}), undefined);
assert.equal(whichBoxedPrimitive(x => x * x), undefined);
assert.equal(whichBoxedPrimitive([]), undefined);

Tests

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