@adguard/aglint/dist/utils/type-guards.js

Universal adblock filter list linter.

/*
 * AGLint v3.0.0 (build date: Wed, 21 May 2025 13:24:14 GMT)
 * (c) 2025 AdGuard Software Ltd.
 * Released under the MIT license
 * https://github.com/AdguardTeam/AGLint#readme
 */
/**
 * Checks whether the given value is undefined.
 *
 * @param value Value to check.
 *
 * @returns `true` if the value is 'undefined', `false` otherwise.
 */
const isUndefined = (value) => {
    return typeof value === 'undefined';
};
/**
 * Checks whether the given value is null.
 *
 * @param value Value to check.
 *
 * @returns `true` if the value is 'null', `false` otherwise.
 */
const isNull = (value) => {
    return value === null;
};
/**
 * Checks whether the given value is a number.
 *
 * @param value Value to check.
 *
 * @returns `true` if the value is a number, `false` otherwise.
 */
const isNumber = (value) => {
    return typeof value === 'number' && !Number.isNaN(value);
};
/**
 * Checks whether the given value is a string.
 *
 * @param value Value to check.
 * @returns `true` if the value is a string, `false` otherwise.
 */
const isString = (value) => {
    return typeof value === 'string';
};

export { isNull, isNumber, isString, isUndefined };