Node.js抛出“未定义btoa".错误 [英] Node.js throws "btoa is not defined" error

问题描述

在我的node.js应用程序中，我做了一个npm install btoa-atob，以便可以使用客户端javascript中固有的btoa()和atob()函数，但由于某些原因未包含在node中.新目录显示在我的node_modules文件夹中，该文件夹本身与app.js一起位于根目录中.然后，确保将btoa-atob作为依赖项添加到根目录下的package.json文件中.

In my node.js application I did an npm install btoa-atob so that I could use the btoa() and atob() functions which are native in client-side javascript but for some reason weren't included in node. The new directory showed up in my node_modules folder, which itself is in root alongside app.js. Then I made sure to add btoa-atob as a dependency in my package.json file which is in root.

但是，由于某些原因，它仍然无法正常工作.

However, for some reason, it still will not work.

console.log(btoa("Hello World!"));

^应该向控制台输出"SGVsbG8gV29ybGQh"，但是，我收到错误消息未定义btoa".

^ should output "SGVsbG8gV29ybGQh" to the console, but instead, I get the error "btoa is not defined."

我没有正确安装吗?我忽略了什么?

Did I not do the install properly? What did I overlook?

推荐答案

"btoa-atob"模块不导出编程接口，仅提供命令行实用程序.

The 'btoa-atob' module does not export a programmatic interface, it only provides command line utilities.

如果您需要转换为Base64，则可以使用Buffer:

If you need to convert to Base64 you could do so using Buffer:

console.log(Buffer.from('Hello World!').toString('base64'));

反向(假设您要解码的内容是utf8字符串):

Reverse (assuming the content you're decoding is a utf8 string):

console.log(Buffer.from(b64Encoded, 'base64').toString());

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注意:在Node v4之前，请使用new Buffer而不是Buffer.from.

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Note: prior to Node v4, use new Buffer rather than Buffer.from.

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