1. What is Base64?
A binary-to-text encoding system called Base64 displays binary data as ASCII strings. It is accomplished by converting the binary data into a representation known as radix-64, which employs a set of 64 characters to represent the binary data. The 26 uppercase and lowercase letters of the English alphabet, the 10 numerals, and two extra characters that differ depending on the implementation are among these characters. The final data block is padded with zeros if it is less than 6 bits, making it a full 6 bits.
The Base64 encoding uses 6 bits per character to represent the original binary data. Data is divided into 6-bit chunks and encoded in Base64, and each chunk is represented by a character from the Base64 character set. If the last chunk of data is less than 6 bits, it is padded with zeros to make it a full 6 bits.
Base64 is commonly used for data transmitting over the internet and storing data in files. For example, it is used in email attachments, HTML images, and JSON Web Tokens (JWTs).
Here is an example of how to use atob() to decode Base64 data:
In this example, we start with a Base64-encoded string SGVsbG8gV29ybGQh, which represents the string "Hello World!". We pass this string to the atob() function, which returns the decoded binary data as a string. After that, we log the decoded string to the console.
Note that the atob() function only works with ASCII strings. If the Base64-encoded data contains non-ASCII characters, you may need to use a third-party library.
To use js-base64, you first need to install it using a package manager, such as npm:
Once installed, you can use the library to decode Base64 data as follows:
In this example, we first import the js-base64 library using require() function.
1. Use Base64 for encoding binary data
Base64 is designed for encoding binary data, such as images, audio, and video. It is not intended for encoding text data, such as JSON or HTML.
2. Use third-party libraries for advanced features
3. Be aware of security risks
Base64 encoding does not provide any security on its own. Therefore, you should avoid encoding sensitive data using Base64, and should always use encryption and other security measures to protect your data.
4. Test thoroughly
When working with Base64 data, it is important to test your code thoroughly to ensure that it is working correctly. You should test for edge cases, such as large data sets, non-ASCII characters, and unexpected input, to ensure that your code is robust and reliable.