Moment.js
JavaScript web frameworks
Web frameworks
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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What is Moment.js
Moment.js is a JavaScript library for parsing, validating, manipulating, and formatting dates and times in web and Node.js applications. Developers use it to handle common date-time tasks such as formatting output strings, calculating differences, and working with time zones via companion packages. It is widely adopted in legacy front-end codebases and server-side JavaScript where consistent date handling is required. The project is in maintenance mode, which affects its suitability for new development.
Broad date-time API
Moment.js provides a comprehensive set of functions for parsing, formatting, arithmetic, and comparison of dates and times. Its API covers many edge cases that arise in real-world applications, such as locale-aware formatting and relative time strings. This breadth can reduce the need for custom date utilities in application code.
Mature ecosystem and docs
The library has long-term usage across the JavaScript ecosystem, resulting in extensive documentation, examples, and community knowledge. Many existing projects, tutorials, and integrations assume Moment.js conventions, which can speed onboarding for teams maintaining older applications. Its stability makes behavior predictable for maintenance work.
Locale and timezone support
Moment.js includes locale data for formatting and parsing in multiple languages and regional conventions. With Moment Timezone, it supports IANA time zones and conversions between zones, which is important for scheduling and global user bases. This combination addresses common requirements in internationalized web applications.
Maintenance mode status
Moment.js is in maintenance mode, meaning it receives limited changes beyond critical fixes. This reduces the likelihood of new features and can make it a less future-proof choice for greenfield projects. Teams may prefer alternatives that align with modern JavaScript standards and active development.
Large bundle footprint
Moment.js is relatively heavy for browser delivery, especially when multiple locales are included. Its design makes aggressive tree-shaking difficult in many build setups, which can increase JavaScript payload size. This can be a drawback for performance-sensitive web applications.
Mutable objects and legacy patterns
Moment.js uses mutable date objects, which can lead to unintended side effects when values are reused across functions. Some API patterns predate newer JavaScript capabilities (for example, the modern Intl APIs), which can feel inconsistent with contemporary coding styles. This can increase the need for careful code review and defensive copying.
Plan & Pricing
| Plan | Price | Key features & notes |
|---|---|---|
| Open-source (MIT) | Completely free | Distributed under the MIT license; install via npm/yarn; no paid tiers or subscription plans listed on the official site. |
