Check if a value is a WeakMap. ```javascript const lolite = require("lolite.isweakmap") const assert = require("node:assert")
npm install lolite.isweakmapjavascript
const lolite = require("lolite.isweakmap")
const assert = require("node:assert")
assert.ok(lolite.isWeakMap(new WeakMap()))
assert.ok(!lolite.isWeakMap(new Map()))
assert.ok(!lolite.isWeakMap(null))
``