extract-alphanumeric/dist/index.js

simple tool to extract alphanumeric characters from a string

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.extract = void 0;
const escapeToRegex = (str) => {
    // Escape any reserved symbols/characters e.g * -> \*
    return str.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&").replace(/\s+/g, "\\s+");
};
const createRegex = (include, exclude) => {
    const includeRegEx = escapeToRegex(include);
    const excludeRegEx = escapeToRegex(exclude);
    const whitelistPattern = `[^a-zA-Z0-9${includeRegEx}]`;
    const blacklistPattern = exclude ? `[${excludeRegEx}]` : "(?!)";
    const whitelist = new RegExp(whitelistPattern, "gu");
    const blacklist = new RegExp(blacklistPattern, "gu");
    return {
        whitelist,
        blacklist,
    };
};
const extract = (input, { include = "", exclude = "", } = {}) => {
    const { whitelist, blacklist } = createRegex(include, exclude);
    return input.replace(whitelist, "").replace(blacklist, "");
};
exports.extract = extract;