validatorjs/validator.js

isISO8601 returns true for an invalid iso8601 date

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#2,003 opened on Jul 18, 2022

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 (16 comments) (1 reaction) (1 assignee)JavaScript (22,497 stars) (2,253 forks)batch import
good first issue🐛 bug

Description

Describe the bug When using isISO8601 to check date that looks like iso8601 format, but missing seconds, will return true even though it is an invalid date

Examples Date string such as "2018-09-11T10:16.000Z" will return true. Live sample: https://codesandbox.io/s/wandering-fire-qr6fm6?file=/src/index.js

Additional context Validator.js version: 13.7.0 Node.js version: 16 OS platform: macOS

Contributor guide

Tech stack
javascript
Domain
backend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
JavaScriptRegular expressionsValidator.js structure
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Examine the isISO8601 function implementation in the codebase (likely src/lib/isISO8601.js). The bug is that the current regex accepts dates without seconds (e.g., '2018-09-11T10:16.000Z'). Review the issue comments for proposed regex patterns or discussions. Update the regex to require seconds or adjust the validation logic accordingly. Ensure existing tests pass and add new tests for the invalid cases.