The "safe-regex-test" npm package allows users to obtain a robust predicate function that tests a regular expression against a string. This package works seamlessly even if the RegExp.prototype is altered at a later stage, ensuring a high level of reliability in testing regular expressions.
To use the "safe-regex-test" package, first, install it via npm with the command npm install --save safe-regex-test. Next, require the package in your JavaScript file and create a tester using the regex you want to test. Here is a JavaScript code example showing how to use "safe-regex-test":
var regexTester = require('safe-regex-test');
var assert = require('assert');
var tester = regexTester('a');
assert.ok(tester('a'));
assert.notOk(tester('b'));
In this sample JavaScript code, the regular expression tester is created with the expression 'a'. It is then tested against the characters 'a' and 'b', with the result being true for 'a' and false for 'b', thus displaying the functionality of the "safe-regex-test" package.
The "safe-regex-test" package's documentation, including the basic usage and installation instructions, can be found within the main README file in the package's GitHub repository, located at https://github.com/ljharb/safe-regex-test.git. This repository includes all necessary details regarding the "safe-regex-test" npm package, providing an excellent resource for developers who are looking to get started with, or improve their understanding of, the package.
