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/* eslint-disable @typescript-eslint/no-explicit-any */
/* eslint-disable @typescript-eslint/explicit-module-boundary-types */
import type { PolymorphicEvent, Primitive } from '@sentry/types';
// eslint-disable-next-line @typescript-eslint/unbound-method
const objectToString = Object.prototype.toString;
/**
* Checks whether given value's type is one of a few Error or Error-like
* {@link isError}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isError(wat: unknown): wat is Error {
switch (objectToString.call(wat)) {
case '[object Error]':
case '[object Exception]':
case '[object DOMException]':
return true;
default:
return isInstanceOf(wat, Error);
}
}
/**
* Checks whether given value is an instance of the given built-in class.
*
* @param wat The value to be checked
* @param className
* @returns A boolean representing the result.
*/
function isBuiltin(wat: unknown, className: string): boolean {
return objectToString.call(wat) === `[object ${className}]`;
}
/**
* Checks whether given value's type is ErrorEvent
* {@link isErrorEvent}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isErrorEvent(wat: unknown): boolean {
return isBuiltin(wat, 'ErrorEvent');
}
/**
* Checks whether given value's type is DOMError
* {@link isDOMError}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isDOMError(wat: unknown): boolean {
return isBuiltin(wat, 'DOMError');
}
/**
* Checks whether given value's type is DOMException
* {@link isDOMException}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isDOMException(wat: unknown): boolean {
return isBuiltin(wat, 'DOMException');
}
/**
* Checks whether given value's type is a string
* {@link isString}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isString(wat: unknown): wat is string {
return isBuiltin(wat, 'String');
}
/**
* Checks whether given value is a primitive (undefined, null, number, boolean, string, bigint, symbol)
* {@link isPrimitive}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isPrimitive(wat: unknown): wat is Primitive {
return wat === null || (typeof wat !== 'object' && typeof wat !== 'function');
}
/**
* Checks whether given value's type is an object literal
* {@link isPlainObject}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isPlainObject(wat: unknown): wat is Record<string, unknown> {
return isBuiltin(wat, 'Object');
}
/**
* Checks whether given value's type is an Event instance
* {@link isEvent}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isEvent(wat: unknown): wat is PolymorphicEvent {
return typeof Event !== 'undefined' && isInstanceOf(wat, Event);
}
/**
* Checks whether given value's type is an Element instance
* {@link isElement}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isElement(wat: unknown): boolean {
return typeof Element !== 'undefined' && isInstanceOf(wat, Element);
}
/**
* Checks whether given value's type is an regexp
* {@link isRegExp}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isRegExp(wat: unknown): wat is RegExp {
return isBuiltin(wat, 'RegExp');
}
/**
* Checks whether given value has a then function.
* @param wat A value to be checked.
*/
export function isThenable(wat: any): wat is PromiseLike<any> {
// eslint-disable-next-line @typescript-eslint/no-unsafe-member-access
return Boolean(wat && wat.then && typeof wat.then === 'function');
}
/**
* Checks whether given value's type is a SyntheticEvent
* {@link isSyntheticEvent}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isSyntheticEvent(wat: unknown): boolean {
return isPlainObject(wat) && 'nativeEvent' in wat && 'preventDefault' in wat && 'stopPropagation' in wat;
}
/**
* Checks whether given value is NaN
* {@link isNaN}.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isNaN(wat: unknown): boolean {
return typeof wat === 'number' && wat !== wat;
}
/**
* Checks whether given value's type is an instance of provided constructor.
* {@link isInstanceOf}.
*
* @param wat A value to be checked.
* @param base A constructor to be used in a check.
* @returns A boolean representing the result.
*/
export function isInstanceOf(wat: any, base: any): boolean {
try {
return wat instanceof base;
} catch (_e) {
return false;
}
}
interface VueViewModel {
// Vue3
__isVue?: boolean;
// Vue2
_isVue?: boolean;
}
/**
* Checks whether given value's type is a Vue ViewModel.
*
* @param wat A value to be checked.
* @returns A boolean representing the result.
*/
export function isVueViewModel(wat: unknown): boolean {
// Not using Object.prototype.toString because in Vue 3 it would read the instance's Symbol(Symbol.toStringTag) property.
return !!(typeof wat === 'object' && wat !== null && ((wat as VueViewModel).__isVue || (wat as VueViewModel)._isVue));
}
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