is-hex-prefixed

What is is-hex-prefixed?

The is-hex-prefixed npm package is a simple utility to check if a given string is prefixed with '0x', which is commonly used to denote hexadecimal values.

What are is-hex-prefixed's main functionalities?

Check if a string is hex-prefixed

This feature allows you to check if a given string starts with the '0x' prefix, indicating that it is a hexadecimal value.

const isHexPrefixed = require('is-hex-prefixed');

const hexString = '0x123abc';
const result = isHexPrefixed(hexString);
console.log(result); // true

Check if a non-hex string is hex-prefixed

This feature allows you to verify that a string without the '0x' prefix is correctly identified as not being hex-prefixed.

const isHexPrefixed = require('is-hex-prefixed');

const nonHexString = '123abc';
const result = isHexPrefixed(nonHexString);
console.log(result); // false

Other packages similar to is-hex-prefixed

ethereumjs-util

The ethereumjs-util package provides a variety of utility functions for Ethereum, including checking if a string is hex-prefixed. It offers more comprehensive functionality compared to is-hex-prefixed, such as hashing, signing, and encoding/decoding utilities.

web3-utils

The web3-utils package is part of the Web3.js library and includes a function called isHexStrict, which checks if a string is a valid hex string with the '0x' prefix. It is more feature-rich and is commonly used in Ethereum development.

README

is-hex-prefixed

A simple method to check if a string is hex prefixed.

Install

npm install --save is-hex-prefixed

Usage

const isHexPrefixed = require('is-hex-prefixed');

console.log(isHexPrefixed('0x..'));

// result true

console.log(isHexPrefixed('dfsk'));

// result false

console.log(isHexPrefixed({}));

// result throw new Error

console.log(isHexPrefixed('-0x'));

// result false

Important documents

• Changelog
• License

Licence

This project is licensed under the MIT license, Copyright (c) 2016 Nick Dodson. For more information see LICENSE.md.

The MIT License

Copyright (c) 2016 Nick Dodson. nickdodson.com

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.