In JavaScript, you can use the btoa()
method to encode a string into its Base64 equivalent.
For example:
// ES5+ const encodedStr = btoa('foobar'); console.log(encodedStr); // 'Zm9vYmFy'
Please note that the btoa()
only supports single byte (8-bit) characters in the ASCII or Latin-1 character sets.
For example, if you pass a string to the btoa()
method that is not in the ASCII or Latin-1 character sets, it will throw an error:
// ES5+
// Uncaught DOMException: Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the Latin1 range.
btoa('🦊');
You will need to convert the string to a binary string to make it compatible with the btoa()
method for Base64 encoding.
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