Javascript 中 atob 方法解码中文字符乱码

Uncaught DOMException: Failed to execute ‘btoa’ on ‘Window’: The string to be encoded contains characters outside of the Latin1 range.

1.借助 encodeURIComponent 和 decodeURIComponent 转义非中文字符

编码

> window.btoa(encodeURIComponent('中文'))
"JUU0JUI4JUFEJUU2JTk2JTg3"
解码

> decodeURIComponent(window.atob('JUU0JUI4JUFEJUU2JTk2JTg3'))
"中文"

2.第三方 Base64 工具

https://gitee.com/loonhxl/jbase64/blob/master/jbase64.js