base64Url

This performs base64 URL encoding often used with JWT

Created by: hackvertor

Installed 1 times

Category: Convert

Created on: Thursday, October 10, 2024 at 11:56:59 AM

Updated on: Thursday, October 10, 2024 at 11:56:59 AM

This is a built in tag

Tag arguments
[]

Code

class base64Url {
  encode(input) {
    return btoa(input)
      .replace(/\+/g, "-")
      .replace(/\//g, "_")
      .replace(/=+$/, "");
  }

  decode(input) {
    input = input.replace(/-/g, "+").replace(/_/g, "/");
    const pad = input.length % 4 === 0 ? 0 : 4 - (input.length % 4);
    input += "=".repeat(pad);
    return atob(input);
  }

  matches(input) {
    const base64urlRegex = /^[A-Za-z0-9_-]+$/;
    const result = base64urlRegex.exec(input);
    return result;
  }
}