index.js

"use strict";
/// <reference lib="es2016"/>
/// <reference lib="es2017.sharedmemory"/>
/// <reference lib="esnext.asynciterable"/>
/// <reference lib="dom"/>
Object.defineProperty(exports, "__esModule", { value: true });
// TODO: Use the `URL` global when targeting Node.js 10
// tslint:disable-next-line
const URLGlobal = typeof URL === 'undefined' ? require('url').URL : URL;
const toString = Object.prototype.toString;
const isOfType = (type) => (value) => typeof value === type;
const isBuffer = (input) => !is.nullOrUndefined(input) && !is.nullOrUndefined(input.constructor) && is.function_(input.constructor.isBuffer) && input.constructor.isBuffer(input);
const getObjectType = (value) => {
    const objectName = toString.call(value).slice(8, -1);
    if (objectName) {
        return objectName;
    }
    return null;
};
const isObjectOfType = (type) => (value) => getObjectType(value) === type;
function is(value) {
    switch (value) {
        case null:
            return "null" /* null */;
        case true:
        case false:
            return "boolean" /* boolean */;
        default:
    }
    switch (typeof value) {
        case 'undefined':
            return "undefined" /* undefined */;
        case 'string':
            return "string" /* string */;
        case 'number':
            return "number" /* number */;
        case 'symbol':
            return "symbol" /* symbol */;
        default:
    }
    if (is.function_(value)) {
        return "Function" /* Function */;
    }
    if (is.observable(value)) {
        return "Observable" /* Observable */;
    }
    if (Array.isArray(value)) {
        return "Array" /* Array */;
    }
    if (isBuffer(value)) {
        return "Buffer" /* Buffer */;
    }
    const tagType = getObjectType(value);
    if (tagType) {
        return tagType;
    }
    if (value instanceof String || value instanceof Boolean || value instanceof Number) {
        throw new TypeError('Please don\'t use object wrappers for primitive types');
    }
    return "Object" /* Object */;
}
(function (is) {
    // tslint:disable-next-line:strict-type-predicates
    const isObject = (value) => typeof value === 'object';
    // tslint:disable:variable-name
    is.undefined = isOfType('undefined');
    is.string = isOfType('string');
    is.number = isOfType('number');
    is.function_ = isOfType('function');
    // tslint:disable-next-line:strict-type-predicates
    is.null_ = (value) => value === null;
    is.class_ = (value) => is.function_(value) && value.toString().startsWith('class ');
    is.boolean = (value) => value === true || value === false;
    is.symbol = isOfType('symbol');
    // tslint:enable:variable-name
    is.numericString = (value) => is.string(value) && value.length > 0 && !Number.isNaN(Number(value));
    is.array = Array.isArray;
    is.buffer = isBuffer;
    is.nullOrUndefined = (value) => is.null_(value) || is.undefined(value);
    is.object = (value) => !is.nullOrUndefined(value) && (is.function_(value) || isObject(value));
    is.iterable = (value) => !is.nullOrUndefined(value) && is.function_(value[Symbol.iterator]);
    is.asyncIterable = (value) => !is.nullOrUndefined(value) && is.function_(value[Symbol.asyncIterator]);
    is.generator = (value) => is.iterable(value) && is.function_(value.next) && is.function_(value.throw);
    is.nativePromise = (value) => isObjectOfType("Promise" /* Promise */)(value);
    const hasPromiseAPI = (value) => !is.null_(value) &&
        isObject(value) &&
        is.function_(value.then) &&
        is.function_(value.catch);
    is.promise = (value) => is.nativePromise(value) || hasPromiseAPI(value);
    is.generatorFunction = isObjectOfType("GeneratorFunction" /* GeneratorFunction */);
    is.asyncFunction = isObjectOfType("AsyncFunction" /* AsyncFunction */);
    is.boundFunction = (value) => is.function_(value) && !value.hasOwnProperty('prototype');
    is.regExp = isObjectOfType("RegExp" /* RegExp */);
    is.date = isObjectOfType("Date" /* Date */);
    is.error = isObjectOfType("Error" /* Error */);
    is.map = (value) => isObjectOfType("Map" /* Map */)(value);
    is.set = (value) => isObjectOfType("Set" /* Set */)(value);
    is.weakMap = (value) => isObjectOfType("WeakMap" /* WeakMap */)(value);
    is.weakSet = (value) => isObjectOfType("WeakSet" /* WeakSet */)(value);
    is.int8Array = isObjectOfType("Int8Array" /* Int8Array */);
    is.uint8Array = isObjectOfType("Uint8Array" /* Uint8Array */);
    is.uint8ClampedArray = isObjectOfType("Uint8ClampedArray" /* Uint8ClampedArray */);
    is.int16Array = isObjectOfType("Int16Array" /* Int16Array */);
    is.uint16Array = isObjectOfType("Uint16Array" /* Uint16Array */);
    is.int32Array = isObjectOfType("Int32Array" /* Int32Array */);
    is.uint32Array = isObjectOfType("Uint32Array" /* Uint32Array */);
    is.float32Array = isObjectOfType("Float32Array" /* Float32Array */);
    is.float64Array = isObjectOfType("Float64Array" /* Float64Array */);
    is.arrayBuffer = isObjectOfType("ArrayBuffer" /* ArrayBuffer */);
    is.sharedArrayBuffer = isObjectOfType("SharedArrayBuffer" /* SharedArrayBuffer */);
    is.dataView = isObjectOfType("DataView" /* DataView */);
    is.directInstanceOf = (instance, klass) => Object.getPrototypeOf(instance) === klass.prototype;
    is.urlInstance = (value) => isObjectOfType("URL" /* URL */)(value);
    is.urlString = (value) => {
        if (!is.string(value)) {
            return false;
        }
        try {
            new URLGlobal(value); // tslint:disable-line no-unused-expression
            return true;
        }
        catch (_a) {
            return false;
        }
    };
    is.truthy = (value) => Boolean(value);
    is.falsy = (value) => !value;
    is.nan = (value) => Number.isNaN(value);
    const primitiveTypes = new Set([
        'undefined',
        'string',
        'number',
        'boolean',
        'symbol'
    ]);
    is.primitive = (value) => is.null_(value) || primitiveTypes.has(typeof value);
    is.integer = (value) => Number.isInteger(value);
    is.safeInteger = (value) => Number.isSafeInteger(value);
    is.plainObject = (value) => {
        // From: https://github.com/sindresorhus/is-plain-obj/blob/master/index.js
        let prototype;
        return getObjectType(value) === "Object" /* Object */ &&
            (prototype = Object.getPrototypeOf(value), prototype === null || // tslint:disable-line:ban-comma-operator
                prototype === Object.getPrototypeOf({}));
    };
    const typedArrayTypes = new Set([
        "Int8Array" /* Int8Array */,
        "Uint8Array" /* Uint8Array */,
        "Uint8ClampedArray" /* Uint8ClampedArray */,
        "Int16Array" /* Int16Array */,
        "Uint16Array" /* Uint16Array */,
        "Int32Array" /* Int32Array */,
        "Uint32Array" /* Uint32Array */,
        "Float32Array" /* Float32Array */,
        "Float64Array" /* Float64Array */
    ]);
    is.typedArray = (value) => {
        const objectType = getObjectType(value);
        if (objectType === null) {
            return false;
        }
        return typedArrayTypes.has(objectType);
    };
    const isValidLength = (value) => is.safeInteger(value) && value > -1;
    is.arrayLike = (value) => !is.nullOrUndefined(value) && !is.function_(value) && isValidLength(value.length);
    is.inRange = (value, range) => {
        if (is.number(range)) {
            return value >= Math.min(0, range) && value <= Math.max(range, 0);
        }
        if (is.array(range) && range.length === 2) {
            return value >= Math.min(...range) && value <= Math.max(...range);
        }
        throw new TypeError(`Invalid range: ${JSON.stringify(range)}`);
    };
    const NODE_TYPE_ELEMENT = 1;
    const DOM_PROPERTIES_TO_CHECK = [
        'innerHTML',
        'ownerDocument',
        'style',
        'attributes',
        'nodeValue'
    ];
    is.domElement = (value) => is.object(value) && value.nodeType === NODE_TYPE_ELEMENT && is.string(value.nodeName) &&
        !is.plainObject(value) && DOM_PROPERTIES_TO_CHECK.every(property => property in value);
    is.observable = (value) => {
        if (!value) {
            return false;
        }
        if (value[Symbol.observable] && value === value[Symbol.observable]()) {
            return true;
        }
        if (value['@@observable'] && value === value['@@observable']()) {
            return true;
        }
        return false;
    };
    is.nodeStream = (value) => !is.nullOrUndefined(value) && isObject(value) && is.function_(value.pipe) && !is.observable(value);
    is.infinite = (value) => value === Infinity || value === -Infinity;
    const isAbsoluteMod2 = (rem) => (value) => is.integer(value) && Math.abs(value % 2) === rem;
    is.even = isAbsoluteMod2(0);
    is.odd = isAbsoluteMod2(1);
    const isWhiteSpaceString = (value) => is.string(value) && /\S/.test(value) === false;
    is.emptyArray = (value) => is.array(value) && value.length === 0;
    is.nonEmptyArray = (value) => is.array(value) && value.length > 0;
    is.emptyString = (value) => is.string(value) && value.length === 0;
    is.nonEmptyString = (value) => is.string(value) && value.length > 0;
    is.emptyStringOrWhitespace = (value) => is.emptyString(value) || isWhiteSpaceString(value);
    is.emptyObject = (value) => is.object(value) && !is.map(value) && !is.set(value) && Object.keys(value).length === 0;
    is.nonEmptyObject = (value) => is.object(value) && !is.map(value) && !is.set(value) && Object.keys(value).length > 0;
    is.emptySet = (value) => is.set(value) && value.size === 0;
    is.nonEmptySet = (value) => is.set(value) && value.size > 0;
    is.emptyMap = (value) => is.map(value) && value.size === 0;
    is.nonEmptyMap = (value) => is.map(value) && value.size > 0;
    const predicateOnArray = (method, predicate, values) => {
        if (is.function_(predicate) === false) {
            throw new TypeError(`Invalid predicate: ${JSON.stringify(predicate)}`);
        }
        if (values.length === 0) {
            throw new TypeError('Invalid number of values');
        }
        return method.call(values, predicate);
    };
    // tslint:disable variable-name
    is.any = (predicate, ...values) => predicateOnArray(Array.prototype.some, predicate, values);
    is.all = (predicate, ...values) => predicateOnArray(Array.prototype.every, predicate, values);
    // tslint:enable variable-name
})(is || (is = {}));
// Some few keywords are reserved, but we'll populate them for Node.js users
// See https://github.com/Microsoft/TypeScript/issues/2536
Object.defineProperties(is, {
    class: {
        value: is.class_
    },
    function: {
        value: is.function_
    },
    null: {
        value: is.null_
    }
});
exports.default = is;
// For CommonJS default export support
module.exports = is;
module.exports.default = is;
//# sourceMappingURL=index.js.map