216 lines
9.5 KiB
JavaScript
216 lines
9.5 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const util = require("util");
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const toString = Object.prototype.toString;
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const isOfType = (type) => (value) => typeof value === type; // tslint:disable-line:strict-type-predicates
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const getObjectType = (value) => {
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const objectName = toString.call(value).slice(8, -1);
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if (objectName) {
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return objectName;
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}
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return null;
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};
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const isObjectOfType = (typeName) => (value) => {
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return getObjectType(value) === typeName;
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};
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function is(value) {
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if (value === null) {
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return "null" /* null */;
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}
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if (value === true || value === false) {
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return "boolean" /* boolean */;
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}
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const type = typeof value;
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if (type === 'undefined') {
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return "undefined" /* undefined */;
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}
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if (type === 'string') {
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return "string" /* string */;
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}
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if (type === 'number') {
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return "number" /* number */;
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}
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if (type === 'symbol') {
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return "symbol" /* symbol */;
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}
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if (is.function_(value)) {
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return "Function" /* Function */;
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}
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if (Array.isArray(value)) {
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return "Array" /* Array */;
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}
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if (Buffer.isBuffer(value)) {
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return "Buffer" /* Buffer */;
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}
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const tagType = getObjectType(value);
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if (tagType) {
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return tagType;
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}
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if (value instanceof String || value instanceof Boolean || value instanceof Number) {
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throw new TypeError('Please don\'t use object wrappers for primitive types');
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}
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return "Object" /* Object */;
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}
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(function (is) {
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const isObject = (value) => typeof value === 'object';
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// tslint:disable:variable-name
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is.undefined = isOfType('undefined');
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is.string = isOfType('string');
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is.number = isOfType('number');
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is.function_ = isOfType('function');
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is.null_ = (value) => value === null;
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is.class_ = (value) => is.function_(value) && value.toString().startsWith('class ');
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is.boolean = (value) => value === true || value === false;
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// tslint:enable:variable-name
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is.symbol = isOfType('symbol');
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is.array = Array.isArray;
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is.buffer = Buffer.isBuffer;
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is.nullOrUndefined = (value) => is.null_(value) || is.undefined(value);
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is.object = (value) => !is.nullOrUndefined(value) && (is.function_(value) || isObject(value));
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is.iterable = (value) => !is.nullOrUndefined(value) && is.function_(value[Symbol.iterator]);
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is.generator = (value) => is.iterable(value) && is.function_(value.next) && is.function_(value.throw);
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is.nativePromise = isObjectOfType("Promise" /* Promise */);
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const hasPromiseAPI = (value) => !is.null_(value) &&
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isObject(value) &&
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is.function_(value.then) &&
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is.function_(value.catch);
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is.promise = (value) => is.nativePromise(value) || hasPromiseAPI(value);
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// TODO: Change to use `isObjectOfType` once Node.js 6 or higher is targeted
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const isFunctionOfType = (type) => (value) => is.function_(value) && is.function_(value.constructor) && value.constructor.name === type;
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is.generatorFunction = isFunctionOfType('GeneratorFunction');
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is.asyncFunction = isFunctionOfType('AsyncFunction');
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is.boundFunction = (value) => is.function_(value) && !value.hasOwnProperty('prototype');
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is.regExp = isObjectOfType("RegExp" /* RegExp */);
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is.date = isObjectOfType("Date" /* Date */);
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is.error = isObjectOfType("Error" /* Error */);
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is.map = isObjectOfType("Map" /* Map */);
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is.set = isObjectOfType("Set" /* Set */);
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is.weakMap = isObjectOfType("WeakMap" /* WeakMap */);
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is.weakSet = isObjectOfType("WeakSet" /* WeakSet */);
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is.int8Array = isObjectOfType("Int8Array" /* Int8Array */);
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is.uint8Array = isObjectOfType("Uint8Array" /* Uint8Array */);
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is.uint8ClampedArray = isObjectOfType("Uint8ClampedArray" /* Uint8ClampedArray */);
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is.int16Array = isObjectOfType("Int16Array" /* Int16Array */);
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is.uint16Array = isObjectOfType("Uint16Array" /* Uint16Array */);
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is.int32Array = isObjectOfType("Int32Array" /* Int32Array */);
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is.uint32Array = isObjectOfType("Uint32Array" /* Uint32Array */);
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is.float32Array = isObjectOfType("Float32Array" /* Float32Array */);
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is.float64Array = isObjectOfType("Float64Array" /* Float64Array */);
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is.arrayBuffer = isObjectOfType("ArrayBuffer" /* ArrayBuffer */);
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is.sharedArrayBuffer = isObjectOfType("SharedArrayBuffer" /* SharedArrayBuffer */);
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is.dataView = isObjectOfType("DataView" /* DataView */);
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// TODO: Remove `object` checks when targeting ES2015 or higher
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// See `Notes`: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/getPrototypeOf
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is.directInstanceOf = (instance, klass) => is.object(instance) && is.object(klass) && Object.getPrototypeOf(instance) === klass.prototype;
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is.truthy = (value) => Boolean(value);
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is.falsy = (value) => !value;
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is.nan = (value) => Number.isNaN(value);
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const primitiveTypes = new Set([
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'undefined',
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'string',
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'number',
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'boolean',
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'symbol'
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]);
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is.primitive = (value) => is.null_(value) || primitiveTypes.has(typeof value);
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is.integer = (value) => Number.isInteger(value);
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is.safeInteger = (value) => Number.isSafeInteger(value);
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is.plainObject = (value) => {
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// From: https://github.com/sindresorhus/is-plain-obj/blob/master/index.js
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let prototype;
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return getObjectType(value) === "Object" /* Object */ &&
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(prototype = Object.getPrototypeOf(value), prototype === null || // tslint:disable-line:ban-comma-operator
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prototype === Object.getPrototypeOf({}));
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};
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const typedArrayTypes = new Set([
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"Int8Array" /* Int8Array */,
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"Uint8Array" /* Uint8Array */,
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"Uint8ClampedArray" /* Uint8ClampedArray */,
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"Int16Array" /* Int16Array */,
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"Uint16Array" /* Uint16Array */,
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"Int32Array" /* Int32Array */,
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"Uint32Array" /* Uint32Array */,
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"Float32Array" /* Float32Array */,
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"Float64Array" /* Float64Array */
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]);
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is.typedArray = (value) => {
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const objectType = getObjectType(value);
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if (objectType === null) {
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return false;
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}
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return typedArrayTypes.has(objectType);
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};
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const isValidLength = (value) => is.safeInteger(value) && value > -1;
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is.arrayLike = (value) => !is.nullOrUndefined(value) && !is.function_(value) && isValidLength(value.length);
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is.inRange = (value, range) => {
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if (is.number(range)) {
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return value >= Math.min(0, range) && value <= Math.max(range, 0);
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}
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if (is.array(range) && range.length === 2) {
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// TODO: Use spread operator here when targeting Node.js 6 or higher
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return value >= Math.min.apply(null, range) && value <= Math.max.apply(null, range);
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}
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throw new TypeError(`Invalid range: ${util.inspect(range)}`);
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};
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const NODE_TYPE_ELEMENT = 1;
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const DOM_PROPERTIES_TO_CHECK = [
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'innerHTML',
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'ownerDocument',
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'style',
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'attributes',
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'nodeValue'
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];
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is.domElement = (value) => is.object(value) && value.nodeType === NODE_TYPE_ELEMENT && is.string(value.nodeName) &&
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!is.plainObject(value) && DOM_PROPERTIES_TO_CHECK.every(property => property in value);
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is.nodeStream = (value) => !is.nullOrUndefined(value) && isObject(value) && is.function_(value.pipe);
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is.infinite = (value) => value === Infinity || value === -Infinity;
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const isAbsoluteMod2 = (value) => (rem) => is.integer(rem) && Math.abs(rem % 2) === value;
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is.even = isAbsoluteMod2(0);
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is.odd = isAbsoluteMod2(1);
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const isWhiteSpaceString = (value) => is.string(value) && /\S/.test(value) === false;
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const isEmptyStringOrArray = (value) => (is.string(value) || is.array(value)) && value.length === 0;
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const isEmptyObject = (value) => !is.map(value) && !is.set(value) && is.object(value) && Object.keys(value).length === 0;
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const isEmptyMapOrSet = (value) => (is.map(value) || is.set(value)) && value.size === 0;
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is.empty = (value) => is.falsy(value) || isEmptyStringOrArray(value) || isEmptyObject(value) || isEmptyMapOrSet(value);
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is.emptyOrWhitespace = (value) => is.empty(value) || isWhiteSpaceString(value);
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const predicateOnArray = (method, predicate, args) => {
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// `args` is the calling function's "arguments object".
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// We have to do it this way to keep node v4 support.
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// So here we convert it to an array and slice off the first item.
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const values = Array.prototype.slice.call(args, 1);
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if (is.function_(predicate) === false) {
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throw new TypeError(`Invalid predicate: ${util.inspect(predicate)}`);
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}
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if (values.length === 0) {
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throw new TypeError('Invalid number of values');
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}
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return method.call(values, predicate);
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};
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function any(predicate) {
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return predicateOnArray(Array.prototype.some, predicate, arguments);
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}
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is.any = any;
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function all(predicate) {
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return predicateOnArray(Array.prototype.every, predicate, arguments);
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}
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is.all = all;
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// tslint:enable:only-arrow-functions no-function-expression
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})(is || (is = {}));
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// Some few keywords are reserved, but we'll populate them for Node.js users
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// See https://github.com/Microsoft/TypeScript/issues/2536
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Object.defineProperties(is, {
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class: {
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value: is.class_
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},
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function: {
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value: is.function_
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},
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null: {
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value: is.null_
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}
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});
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exports.default = is;
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// For CommonJS default export support
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module.exports = is;
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module.exports.default = is;
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