Implementing Input Masks in React Applications
maska, react-input-mask, and react-maskedinput are libraries designed to format user input in real-time, ensuring data consistency for fields like phone numbers, dates, and credit cards. react-input-mask is a legacy React-specific wrapper that simplifies integration but struggles with modern React features. react-maskedinput is an older component-based solution that is largely unmaintained today. maska is a modern, framework-independent library that offers robust cursor handling and IME support, requiring slightly more setup in React but providing better long-term stability.
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Input Masking Libraries: Architecture, Stability, and DX Compared
Implementing input masks seems simple until you deal with cursor positioning, clipboard pasting, or mobile keyboard quirks. The three libraries — maska, react-input-mask, and react-maskedinput — take different approaches to solving these problems. Let's break down how they handle real-world engineering challenges.
🏗️ Integration Model: Components vs Classes
react-maskedinput uses a legacy component replacement strategy.
- You swap the standard
<input>tag for the<MaskedInput>component. - It manages its own internal state, which can conflict with React's controlled component model.
// react-maskedinput: Component replacement
import MaskedInput from 'react-maskedinput';
function PhoneField() {
return <MaskedInput mask="(111) 111-1111" name="phone" />;
}
react-input-mask wraps the input using a Higher-Order Component (HOC) pattern.
- You pass a child function or use it as a direct component.
- It attempts to sync with React state but can lag during rapid typing.
// react-input-mask: Wrapper component
import InputMask from 'react-input-mask';
function PhoneField() {
return <InputMask mask="(999) 999-9999" >
{(inputProps) => <input {...inputProps} />}
</InputMask>;
}
maska uses a vanilla JavaScript class attached via refs.
- You keep the standard
<input>element. - You initialize the mask logic inside a
useEffecthook. - This avoids wrapper overhead and gives you full control over the DOM node.
// maska: Class-based ref attachment
import { Maska } from 'maska';
import { useRef, useEffect } from 'react';
function PhoneField() {
const ref = useRef(null);
useEffect(() => {
new Maska(ref.current, { mask: '(###) ###-####' });
}, []);
return <input ref={ref} type="tel" />;
}
🖱️ Cursor Stability and Editing
Cursor jumping is the most common complaint in masking libraries. It happens when the library rewrites the value while the user is typing in the middle of the string.
react-maskedinput often forces the cursor to the end.
- Editing in the middle of a phone number can be frustrating.
- It recalculates position based on simple placeholder logic.
// react-maskedinput: Known cursor issues
// User types at index 5, cursor jumps to index 10
<MaskedInput mask="(111) 111-1111" />
react-input-mask improves on this but still struggles with complex masks.
- It tries to preserve position but fails with optional characters.
- Backspacing often deletes more than expected.
// react-input-mask: Better but imperfect
// Optional digits might cause cursor drift
<InputMask mask="(999) 999-9999" />
maska prioritizes cursor stability as a core feature.
- It calculates position based on actual typed characters, not just placeholders.
- Supports undo/redo stacks natively.
// maska: Stable cursor handling
// Configuration allows fine-tuning behavior
new Maska(input, {
mask: '(###) ###-####',
eager: false
});
🌐 Mobile and IME Support
Input Method Editors (IME) are used for languages like Chinese, Japanese, or Korean. They require composing states before finalizing text.
react-maskedinput has no specific IME handling.
- Composition events can break the mask logic.
- Not recommended for international applications.
// react-maskedinput: No IME support
// Composition events may trigger unwanted masking
<MaskedInput mask="(111) 111-1111" />
react-input-mask has partial IME support.
- It listens to composition events but can still interfere with typing.
- Mobile keyboards might trigger unexpected reformats.
// react-input-mask: Partial IME support
// May require workarounds for mobile browsers
<InputMask mask="(999) 999-9999" />
maska explicitly handles composition events.
- It waits for composition to end before applying the mask.
- Works reliably on iOS and Android virtual keyboards.
// maska: Full IME support
// Handles compositionstart and compositionend internally
new Maska(input, { mask: '+# (#) ##-##' });
🛠️ Maintenance and Ecosystem
Choosing a library also means choosing its maintenance status. Unmaintained packages become security risks and technical debt.
react-maskedinput is effectively abandoned.
- No recent updates to match React versions.
- Does not support React 18 strict mode or concurrent features.
- Recommendation: Avoid for new projects.
// react-maskedinput: Legacy status
// Check npm for last publish date (years ago)
import MaskedInput from 'react-maskedinput';
react-input-mask is in maintenance mode.
- Receives occasional fixes but no major feature work.
- Widely used but known to have edge-case bugs.
- Recommendation: Use only for legacy maintenance.
// react-input-mask: Maintenance mode
// Stable but not evolving
import InputMask from 'react-input-mask';
maska is actively developed.
- Regular updates for bug fixes and framework support.
- Built with modern TypeScript and testing standards.
- Recommendation: Preferred choice for new development.
// maska: Active development
// Modern API and regular commits
import { Maska } from 'maska';
📊 Summary: Key Differences
| Feature | react-maskedinput | react-input-mask | maska |
|---|---|---|---|
| Architecture | 🧩 Legacy Component | 🧩 Wrapper Component | 🛠️ Vanilla Class + Ref |
| Cursor Handling | ❌ Poor | ⚠️ Moderate | ✅ Excellent |
| IME Support | ❌ None | ⚠️ Partial | ✅ Full |
| React 18 Ready | ❌ No | ⚠️ Limited | ✅ Yes |
| Status | 🛑 Abandoned | 🟡 Maintenance | 🟢 Active |
💡 Final Recommendation
react-maskedinput should be avoided entirely in modern development. It lacks the maintenance and technical foundation required for today's web apps.
react-input-mask remains a viable option only if you are stuck maintaining an older codebase where swapping libraries would introduce too much risk. It is easy to install but comes with known limitations.
maska is the superior technical choice for new projects. While it requires slightly more setup code in React (using refs instead of a component), the trade-off is worth it for the stability, IME support, and active maintenance. It future-proofs your input handling logic.
How to Choose: maska vs react-input-mask vs react-maskedinput
- maska:
Choose
maskafor new projects requiring robust input handling, especially if you need strong IME support or plan to share logic across different frameworks. It offers the best cursor stability and modern architecture, though it requires manual ref attachment in React instead of a drop-in component. - react-input-mask:
Choose
react-input-maskonly for maintaining existing legacy React applications where refactoring is too costly. It provides a simple component API but suffers from known cursor jumping issues and limited support for React 18 concurrent features. - react-maskedinput:
Do not choose
react-maskedinputfor any new development. It is effectively unmaintained and lacks support for modern React patterns. Only consider this if you are forced to support a very old codebase that already depends on it.
Popular Comparisons
README for maska
Simple zero-dependency input mask.
Documentation & demo
Maska
Support ☕️
❤️ Please support Maska development!
Features ✨
- No dependencies and small size: ~3 Kb gziped
- Vanilla JS version + Vue 2/3, Alpine.js and Svelte integrations
- Works with native and custom inputs
- Custom tokens with modifiers, transform functions and hooks
- Number mask mode: easy money formatting
- Dynamic, reversed and eager masks
What’s new in v3 🎉
- Integrations with Alpine.js and Svelte
- Number mask mode
- Simplified directive format
- Other small improvements and fixes