Updated the Survey.

node_modules/@sindresorhus/is/dist/index.d.ts

@@ -0,0 +1,132 @@
+/// <reference types="node" />
+/// <reference lib="es2016" />
+/// <reference lib="es2017.sharedmemory" />
+/// <reference lib="esnext.asynciterable" />
+/// <reference lib="dom" />
+declare type TypedArray = Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array;
+declare type Primitive = null | undefined | string | number | boolean | Symbol;
+export interface ArrayLike {
+    length: number;
+}
+export interface Class<T = unknown> {
+    new (...args: any[]): T;
+}
+declare type DomElement = object & {
+    nodeType: 1;
+    nodeName: string;
+};
+declare type NodeStream = object & {
+    pipe: Function;
+};
+export declare const enum TypeName {
+    null = "null",
+    boolean = "boolean",
+    undefined = "undefined",
+    string = "string",
+    number = "number",
+    symbol = "symbol",
+    Function = "Function",
+    GeneratorFunction = "GeneratorFunction",
+    AsyncFunction = "AsyncFunction",
+    Observable = "Observable",
+    Array = "Array",
+    Buffer = "Buffer",
+    Object = "Object",
+    RegExp = "RegExp",
+    Date = "Date",
+    Error = "Error",
+    Map = "Map",
+    Set = "Set",
+    WeakMap = "WeakMap",
+    WeakSet = "WeakSet",
+    Int8Array = "Int8Array",
+    Uint8Array = "Uint8Array",
+    Uint8ClampedArray = "Uint8ClampedArray",
+    Int16Array = "Int16Array",
+    Uint16Array = "Uint16Array",
+    Int32Array = "Int32Array",
+    Uint32Array = "Uint32Array",
+    Float32Array = "Float32Array",
+    Float64Array = "Float64Array",
+    ArrayBuffer = "ArrayBuffer",
+    SharedArrayBuffer = "SharedArrayBuffer",
+    DataView = "DataView",
+    Promise = "Promise",
+    URL = "URL"
+}
+declare function is(value: unknown): TypeName;
+declare namespace is {
+    const undefined: (value: unknown) => value is undefined;
+    const string: (value: unknown) => value is string;
+    const number: (value: unknown) => value is number;
+    const function_: (value: unknown) => value is Function;
+    const null_: (value: unknown) => value is null;
+    const class_: (value: unknown) => value is Class<unknown>;
+    const boolean: (value: unknown) => value is boolean;
+    const symbol: (value: unknown) => value is Symbol;
+    const numericString: (value: unknown) => boolean;
+    const array: (arg: any) => arg is any[];
+    const buffer: (input: unknown) => input is Buffer;
+    const nullOrUndefined: (value: unknown) => value is null | undefined;
+    const object: (value: unknown) => value is object;
+    const iterable: (value: unknown) => value is IterableIterator<unknown>;
+    const asyncIterable: (value: unknown) => value is AsyncIterableIterator<unknown>;
+    const generator: (value: unknown) => value is Generator;
+    const nativePromise: (value: unknown) => value is Promise<unknown>;
+    const promise: (value: unknown) => value is Promise<unknown>;
+    const generatorFunction: (value: unknown) => value is GeneratorFunction;
+    const asyncFunction: (value: unknown) => value is Function;
+    const boundFunction: (value: unknown) => value is Function;
+    const regExp: (value: unknown) => value is RegExp;
+    const date: (value: unknown) => value is Date;
+    const error: (value: unknown) => value is Error;
+    const map: (value: unknown) => value is Map<unknown, unknown>;
+    const set: (value: unknown) => value is Set<unknown>;
+    const weakMap: (value: unknown) => value is WeakMap<object, unknown>;
+    const weakSet: (value: unknown) => value is WeakSet<object>;
+    const int8Array: (value: unknown) => value is Int8Array;
+    const uint8Array: (value: unknown) => value is Uint8Array;
+    const uint8ClampedArray: (value: unknown) => value is Uint8ClampedArray;
+    const int16Array: (value: unknown) => value is Int16Array;
+    const uint16Array: (value: unknown) => value is Uint16Array;
+    const int32Array: (value: unknown) => value is Int32Array;
+    const uint32Array: (value: unknown) => value is Uint32Array;
+    const float32Array: (value: unknown) => value is Float32Array;
+    const float64Array: (value: unknown) => value is Float64Array;
+    const arrayBuffer: (value: unknown) => value is ArrayBuffer;
+    const sharedArrayBuffer: (value: unknown) => value is SharedArrayBuffer;
+    const dataView: (value: unknown) => value is DataView;
+    const directInstanceOf: <T>(instance: unknown, klass: Class<T>) => instance is T;
+    const urlInstance: (value: unknown) => value is URL;
+    const urlString: (value: unknown) => boolean;
+    const truthy: (value: unknown) => boolean;
+    const falsy: (value: unknown) => boolean;
+    const nan: (value: unknown) => boolean;
+    const primitive: (value: unknown) => value is Primitive;
+    const integer: (value: unknown) => value is number;
+    const safeInteger: (value: unknown) => value is number;
+    const plainObject: (value: unknown) => boolean;
+    const typedArray: (value: unknown) => value is TypedArray;
+    const arrayLike: (value: unknown) => value is ArrayLike;
+    const inRange: (value: number, range: number | number[]) => boolean;
+    const domElement: (value: unknown) => value is DomElement;
+    const observable: (value: unknown) => boolean;
+    const nodeStream: (value: unknown) => value is NodeStream;
+    const infinite: (value: unknown) => boolean;
+    const even: (value: number) => boolean;
+    const odd: (value: number) => boolean;
+    const emptyArray: (value: unknown) => boolean;
+    const nonEmptyArray: (value: unknown) => boolean;
+    const emptyString: (value: unknown) => boolean;
+    const nonEmptyString: (value: unknown) => boolean;
+    const emptyStringOrWhitespace: (value: unknown) => boolean;
+    const emptyObject: (value: unknown) => boolean;
+    const nonEmptyObject: (value: unknown) => boolean;
+    const emptySet: (value: unknown) => boolean;
+    const nonEmptySet: (value: unknown) => boolean;
+    const emptyMap: (value: unknown) => boolean;
+    const nonEmptyMap: (value: unknown) => boolean;
+    const any: (predicate: unknown, ...values: unknown[]) => boolean;
+    const all: (predicate: unknown, ...values: unknown[]) => boolean;
+}
+export default is;

node_modules/@sindresorhus/is/dist/index.js

@@ -0,0 +1,245 @@
+"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