Assert | Node.js v21.5.0 Documentation

In strict assertion mode, non-strict methods behave like their corresponding strict methods. For example, assert.deepEqual() will behave like assert.deepStrictEqual(). In strict assertion mode, error messages for objects display a diff. In legacy assertion mode, error messages for objects display the objects, often truncated. To use strict assertion mode: import { strict as assert } from 'node:ass

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Assert Node.js v0.12.3 Manual & Documentation