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type-checking\n\n[![NPM Version][npm-image]][npm-url]\n[![NPM Downloads][downloads-image]][downloads-url]\n\n\nRuntime type checking and type assertion library for Node and the browser\n\n\n- Traditional syntax.\n- Aims to cover every EcmaScript language type and specification type except Proxy.\n- Offers a small set of composable numeric predicates and assertions for integers, signed numbers, and special numbers.\n- Cross-realm/iframe support (i.e., predicates should remain correct across different realms).\n- Does not get easily fooled by the value of the `Symbol.toStringTag` property.\n- Handles `-0` and `NaN` correctly.\n- Aims to provide readable error messages.\n- Does not rely on Symbol.toStringTag\n- You can easily disable `typeChecking.assert()` (but not `.expect()`) for production:\n\tin Node: by setting the NODE_NDEBUG environment variable;\n\tin Nashorn: by setting the \"nashorn.ndebug\" system property.\n- Does not aim to cover any DOM API type.\n- Does not aim to cover complex constrained string types like email address etc.\n- Does not aim to offer custom type constructor.\n\n## Installation\n```sh\nnpm install @fmartin5/type-checking\n```\n## Usage\n```js\nconst tc = require(\"@fmartin5/type-checking\");\n\nlet x = 0;\n\ntc.isNumber(x); // true\ntc.isInteger(x); // true\n\ntc.isPositiveNumber(x); // true\ntc.isPositiveInteger(x); // true\n\ntc.isStrictlyPositiveNumber(x); // false\ntc.isStrictlyPositiveInteger(x); // false\n\n\nlet map = new Map();\ntc.isMap(map); // true\ntc.isWeakMap(map); // false\n\ntc.expectMap(map); //\ntc.expectWeakMap(map); // TypeError: expected a 'WeaMap' object.\n\n\n```\n\n## Tests\n\nClone the repo, then do:\n```sh\nnpm install\nnpm test\n```\n\n## License\n\n[AGPL-3.0](LICENSE)\n\n[npm-image]: https://img.shields.io/npm/v/@fmartin5/type-checking.svg\n[npm-url]: https://npmjs.org/package/@fmartin5/type-checking\n\n[downloads-image]: https://img.shields.io/npm/dm/@fmartin5/type-checking.svg\n[downloads-url]: 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