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528 BJavaScriptView Raw
1// Copyright 2017-2022 @polkadot/util authors & contributors
2// SPDX-License-Identifier: Apache-2.0
3
4/**
5 * @name isError
6 * @summary Tests for a `Error` object instance.
7 * @description
8 * Checks to see if the input object is an instance of `Error`.
9 * @example
10 * <BR>
11 *
12 * ```javascript
13 * import { isError } from '@polkadot/util';
14 *
15 * console.log('isError', isError(new Error('message'))); // => true
16 * ```
17 */
18export function isError(value) {
19 return (value && value.constructor) === Error || value instanceof Error;
20}
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