A secure randomization utility library that provides various randomization functions, supporting both browser and Node.js environments.
npm install randomize-anyA secure randomization utility library that provides various randomization functions, supporting both browser and Node.js environments.
- 🔒 Secure Random: Uses crypto.getRandomValues() for cryptographically secure random number generation
- 🎯 Multiple Types: Supports randomization of array elements, integers, and floating-point numbers
- ⚖️ Weight Support: Built-in weighted random algorithms
- 🌐 Cross-platform: Supports both browser and Node.js environments
- 📦 Multiple Formats: Provides ESM, CJS, UMD and other module formats
- 🔧 TypeScript: Complete TypeScript type definitions
``bash`
npm install randomize-any
Or using pnpm:
`bash`
pnpm add randomize-any
`javascript`
import { randomizeAny, randomizeInteger, randomizeFloat } from 'randomize-any';
#### randomizeAny(list: any[]): any
Randomly select an element from an array.
Parameters:
- list - The array to randomly select from
Returns:
- A random element from the array
Example:
`javascript
const fruits = ['apple', 'banana', 'orange', 'grape'];
const randomFruit = randomizeAny(fruits);
console.log(randomFruit); // e.g.: 'banana'
const numbers = [1, 2, 3, 4, 5];
const randomNumber = randomizeAny(numbers);
console.log(randomNumber); // e.g.: 3
`
#### randomizeInteger(min: number, max: number): number
Generate a random integer within the specified range.
Parameters:
- min - Minimum value (inclusive)max
- - Maximum value (inclusive)
Returns:
- A random integer within the range
Example:
`javascript
const randomInt = randomizeInteger(1, 10);
console.log(randomInt); // e.g.: 7
const diceRoll = randomizeInteger(1, 6);
console.log(diceRoll); // e.g.: 4
`
#### randomizeFloat(min: number, max: number): number
Generate a random floating-point number within the specified range (precision: 0.01).
Parameters:
- min - Minimum value (inclusive)max
- - Maximum value (inclusive)
Returns:
- A random floating-point number within the range
Example:
`javascript
const randomFloat = randomizeFloat(0, 1);
console.log(randomFloat); // e.g.: 0.73
const temperature = randomizeFloat(20.0, 30.0);
console.log(temperature); // e.g.: 25.67
`
#### getSecureWeightedRandom(weights: number[]): number
Generate a secure random index based on a weight array.
Parameters:
- weights - Weight array
Returns:
- A random index based on weight distribution
Example:
`javascript
// Weights [1, 2, 3], index 2 has the highest probability of being selected
const weights = [1, 2, 3];
const randomIndex = getSecureWeightedRandom(weights);
console.log(randomIndex); // 0, 1, or 2
// Practical application: Select prizes based on weights
const prizes = ['Bronze', 'Silver', 'Gold'];
const prizeWeights = [5, 3, 1]; // Bronze has the highest probability
const selectedPrizeIndex = getSecureWeightedRandom(prizeWeights);
const selectedPrize = prizes[selectedPrizeIndex];
console.log(selectedPrize);
`
`javascript
import { randomizeAny, randomizeInteger, getSecureWeightedRandom } from 'randomize-any';
// Create a weighted random selector
function weightedRandomSelect(items, weights) {
const index = getSecureWeightedRandom(weights);
return items[index];
}
const items = ['Common Item', 'Rare Item', 'Legendary Item'];
const weights = [70, 25, 5]; // 70% common, 25% rare, 5% legendary
const selectedItem = weightedRandomSelect(items, weights);
console.log(selectedItem);
`
`javascript
// Generate random user data
function generateRandomUser() {
const names = ['John', 'Jane', 'Bob', 'Alice'];
const ages = randomizeInteger(18, 65);
const scores = randomizeFloat(60, 100);
return {
name: randomizeAny(names),
age: ages,
score: Math.round(scores * 100) / 100
};
}
const user = generateRandomUser();
console.log(user);
// e.g.: { name: 'Jane', age: 28, score: 87.34 }
`
This library uses the crypto.getRandomValues() API to provide cryptographically secure random numbers. Supported browsers include:
- Chrome 11+
- Firefox 21+
- Safari 3.1+
- Edge 12+
- IE 11+
For unsupported environments, it automatically falls back to Math.random().
This package provides multiple module formats:
- ESM: dist/index.browser.esm.mjs
- CommonJS:
- UMD:
- Legacy versions: Compatible versions with polyfills
`bashInstall dependencies
pnpm install
Websites Using This Library
Here are some websites and applications that use
- Colorfle Unlimited - A color wordle use the random algorithm to select daily target color randomly.
- Flagle Explorer - A flag wordle select daily flag randomly by using weighted randomization.
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MIT License