Package Exports

@silen/is-error

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@silen/is-error) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

is-error

Determine if a value is Error

install

npm i @silen/is-error

api

declare function isError(val: any): boolean;

usage

const { isError } = require('@silen/is-error');
// or
import { isError } from '@silen/is-error';

console.log(isError(new Buffer(4)));
console.log(isError(Buffer.alloc(4)));
console.log(isError(undefined));
console.log(isError(null));
console.log(isError(''));
console.log(isError(true));
console.log(isError(0));
console.log(isError(1));
console.log(isError(1.0));
console.log(isError('string'));
console.log(isError({}));
console.log(isError(function foo() {}));
console.log(isError(Symbol()));
console.log(isError(new Set));
console.log(isError(new Map));
console.log(isError(new WeakMap));
console.log(isError(new WeakSet));

// or
console.log(window.Type.isError(new WeakSet));

This is a demo for testing the usage of isError from @silen/is-error module. You can try the others and do likewise.