学习？学个屁
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初始化提交
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3 weeks ago | |
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| .. | ||
| .github | 3 weeks ago | |
| test | 3 weeks ago | |
| .editorconfig | 3 weeks ago | |
| .eslintrc | 3 weeks ago | |
| .nycrc | 3 weeks ago | |
| CHANGELOG.md | 3 weeks ago | |
| LICENSE | 3 weeks ago | |
| README.md | 3 weeks ago | |
| index.d.ts | 3 weeks ago | |
| index.js | 3 weeks ago | |
| package.json | 3 weeks ago | |
| tsconfig.json | 3 weeks ago | |
README.md
is-weakmap 
Is this value a JS WeakMap? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
Example
var isWeakMap = require('is-weakmap');
assert(!isWeakMap(function () {}));
assert(!isWeakMap(null));
assert(!isWeakMap(function* () { yield 42; return Infinity; });
assert(!isWeakMap(Symbol('foo')));
assert(!isWeakMap(1n));
assert(!isWeakMap(Object(1n)));
assert(!isWeakMap(new Set()));
assert(!isWeakMap(new WeakSet()));
assert(!isWeakMap(new Map()));
assert(isWeakMap(new WeakMap()));
class MyWeakMap extends WeakMap {}
assert(isWeakMap(new MyWeakMap()));
Tests
Simply clone the repo, npm install, and run npm test