Problem serializing URL classes when stringifying a value
Author: damusixCreated Mar 10, 2025Updated Mar 30, 2026
Labelsbug
Runtime
nodejs
Runtime version
22.14 and 20.15
Module version
17.13.3
Last module version without issue
No response
Used with
hapi application
Any other relevant information
When validating something with a class, the JSON validator throws an error whenever a URL instance is present.
What are you trying to achieve or the steps to reproduce?
const Joi = require('joi');
const someSchema = Joi.object({
type: Joi.string().required(),
}).unknown(false);
const configs = [
{
someUrl: new URL('https://some-url.com')
}
]
Joi.assert(
configs,
Joi.array().items(someSchema)
);What was the result you got?
TypeError: Receiver must be an instance of class URL
at URL.toJSON (node:internal/url:1136:10)
at JSON.stringify (<anonymous>)
at internals.safeStringify (/repos/joibug/node_modules/joi/lib/annotate.js:93:17)
at exports.error [as annotate] (/repos/joibug/node_modules/joi/lib/annotate.js:70:29)
at internals.assert (/repos/joibug/node_modules/joi/lib/index.js:236:78)
at Object.assert (/repos/joibug/node_modules/joi/lib/index.js:102:19)
at Object.<anonymous> (/repos/joibug/index.js:14:5)
at Module._compile (node:internal/modules/cjs/loader:1554:14)
at Object..js (node:internal/modules/cjs/loader:1706:10)
at Module.load (node:internal/modules/cjs/loader:1289:32)
Node.js v22.14.0What result did you expect?
/repos/joibug/node_modules/joi/lib/index.js:243
throw error;
^
Error [ValidationError]: [
{
"someUrl": "...",
"type" [1]: -- missing --
}
]
[1] "[0].type" is required
at exports.process (/repos/joibug/node_modules/joi/lib/errors.js:193:16)
at internals.entry (/repos/joibug/node_modules/joi/lib/validator.js:250:26)
at exports.entry (/repos/joibug/node_modules/joi/lib/validator.js:27:30)
at internals.Base.validate (/repos/joibug/node_modules/joi/lib/base.js:548:26)
at internals.assert (/repos/joibug/node_modules/joi/lib/index.js:225:27)
at Object.assert (/repos/joibug/node_modules/joi/lib/index.js:102:19)
at Object.<anonymous> (/repos/joibug/index.js:14:5)
at Module._compile (node:internal/modules/cjs/loader:1554:14)
at Object..js (node:internal/modules/cjs/loader:1706:10)
at Module.load (node:internal/modules/cjs/loader:1289:32) {
_original: [ { someUrl: '...' } ],
details: [
{
message: '"[0].type" is required',
path: [ 0, 'type' ],
type: 'any.required',
context: { label: '[0].type', key: 'type' }
}
]
}
Node.js v22.14.0Source: hapijs/joi