将字符串转换为 JavaScript 中的 base64。 btoa 和 atob 已弃用

Question

I have been working on some projects in VS Code lately and suddenly started receiving notifications in my code that btoa and atob are now deprecated. I can't find any resource for this besides VS Code. If this is true, what alternative is there?

Answer 1

btoa and atob are only deprecated for Node JS. If you prepend the window. you will get rid of this deprecation mark.

On the other hand, if you are trying to use btoa o atob in the back-end side, you definitely should use Buffer interface.

References:

1. https://github.com/microsoft/TypeScript/issues/45566#issuecomment-905057883
2. https://github.com/microsoft/TypeScript/issues/45566
3. https://developer.mozilla.org/en-US/docs/Web/API/btoa (No deprecation warnings!)

Answer 2

Still within VS Code, I had a look into the comments for the deprecated btoa(str) function. It suggests the following as a replacement:

const base64Str = Buffer.from(str, 'utf8').toString('base64');

Answer 3

I am using the follow methods below to encode/decode base64 in modern Javascript ES6. It's nice to wrap these methods in a js utils file, so it's easy to just import them and use.

export const encodeBase64 = (data) => {
    return Buffer.from(data).toString('base64');
}
export const decodeBase64 = (data) => {
    return Buffer.from(data, 'base64').toString('ascii');
}

Answer 4

The Node btoa() and atob() functions are the only ones that have been deprecated. However, if you're working on the DOM code (front-end) and see this deprecated notice, you can use the window object to get around it.

window.atob()

For more info