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\n AssertionError and AssertionResult classes.\n

\n\n

\n \n \n \n \n \n \n \n

\n\n## What is AssertionError?\n\nAssertion Error is a module that contains two classes: `AssertionError`, which\nis an instance of an `Error`, and `AssertionResult` which is not an instance of\nError.\n\nThese can be useful for returning from a function - if the function \"succeeds\"\nreturn an `AssertionResult` and if the function fails return (or throw) an\n`AssertionError`.\n\nBoth `AssertionError` and `AssertionResult` implement the `Result` interface:\n\n```typescript\ninterface Result {\n name: \"AssertionError\" | \"AssertionResult\";\n ok: boolean;\n toJSON(...args: unknown[]): Record;\n}\n```\n\nSo if a function returns `AssertionResult | AssertionError` it is easy to check\n_which_ one is returned by checking either `.name` or `.ok`, or check\n`instanceof Error`.\n\n## Installation\n\n### Node.js\n\n`assertion-error` is available on [npm](http://npmjs.org).\n\n```\n$ npm install --save assertion-error\n```\n\n### Deno\n\n`assertion_error` is available on\n[Deno.land](https://deno.land/x/assertion_error)\n\n```typescript\nimport {\n AssertionError,\n AssertionResult,\n} from \"https://deno.land/x/assertion_error@2.0.0/mod.ts\";\n```\n","_attachments":{},"homepage":"https://github.com/chaijs/assertion-error#readme","bugs":{"url":"https://github.com/chaijs/assertion-error/issues"},"license":"MIT"}