randexp.js
Generate random strings that match any given JavaScript regular expression.
What is randexp.js?
randexp.js is a JavaScript library that generates random strings based on a provided regular expression pattern. It enables developers to create test data, sample strings, or placeholder content that adheres to complex regex rules, making it useful for testing and prototyping. The library supports a wide range of regex features, including grouping, alternation, character sets, backreferences, and repetition quantifiers.
Developers and testers who need to generate synthetic data matching specific patterns, such as those working on unit testing, data mocking, or prototyping applications that require structured string inputs. It is particularly valuable for JavaScript and TypeScript projects where regex-based string generation is needed.
Developers choose randexp.js because it leverages the universal expressiveness of regular expressions to define string patterns, bridging the gap between specification and synthetic data generation. Its unique selling points include full regex support, customizable character ranges, seedable PRNG overrides for deterministic outputs, and a convenient syntax for direct regex literal usage.
Overview
Create random strings that match a given regular expression.
Use Cases
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