Assertions

API support and documentation for the node:assert module.

import assert from "node:assert"

const assert = require("node:assert")

Modules

Status	Module	Docs	Notes
🟢 Supported.	`node:assert`	Assertions	Standard assertions.
🔴 Not yet implemented.	`node:assert/strict`	Strict Assertions	Strict-mode assertions.

assert(value[, message]): 🟢 Supported.
assert.deepEqual(actual, expected[, message]): 🔴 Not yet implemented.
assert.deepStrictEqual(actual, expected[, message]): 🔴 Not yet implemented.
assert.doesNotMatch(string, regexp[, message]): 🟢 Supported.
assert.doesNotReject(asyncFn[, error][, message]): 🟢 Supported.
assert.doesNotThrow(fn[, error][, message]): 🟢 Supported.
assert.equal(actual, expected[, message]): 🟢 Supported.
assert.fail([message]): 🟢 Supported.
assert.fail(actual, expected[, message[, operator[, stackStartFn]]]): 🟢 Supported.
assert.ifError(value): 🟢 Supported.
assert.match(string, regexp[, message]): 🟢 Supported.
assert.notDeepEqual(actual, expected[, message]): 🔴 Not yet implemented.
assert.notDeepEqualStrict(actual, expected[, message]): 🔴 Not yet implemented.
assert.notEqual(actual, expected[, message]): 🟢 Supported.
assert.notStrictEqual(actual, expected[, message]): 🔴 Not yet implemented.
assert.ok(value[, message]): 🟢 Supported.
assert.rejects(asyncFn[, error][, message]): 🟢 Supported.
assert.strictEqual(actual, expected[, message]): 🔴 Not yet implemented.
assert.throws(fn[, error][, message]): 🟢 Supported.

Last modified: 15 March 2025