为什么我不能在 React 中使用 jsonwebtoken 中的 jwt.verify() ？

Question

当我在react中使用jwt.verify()或jwt.decode()函数时，它显示了很多错误。

错误是：

ERROR in ./node_modules/jwa/index.js 5:13-30

Module not found: Error: Can't resolve 'crypto' in 'C:\Users\client\node_modules\jwa'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "crypto": require.resolve("crypto-browserify") }'
    - install 'crypto-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "crypto": false }


ERROR in ./node_modules/jwa/index.js 9:11-26

Module not found: Error: Can't resolve 'util' in 'C:\Users\client\node_modules\jwa'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "util": require.resolve("util/") }'
    - install 'util'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "util": false }


ERROR in ./node_modules/jws/lib/data-stream.js 4:13-30

Module not found: Error: Can't resolve 'stream' in 'C:\Users\client\node_modules\jws\lib'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "stream": require.resolve("stream-browserify") }'
    - install 'stream-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "stream": false }


ERROR in ./node_modules/jws/lib/data-stream.js 6:11-26

Module not found: Error: Can't resolve 'util' in 'C:\Users\client\node_modules\jws\lib'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "util": require.resolve("util/") }'
    - install 'util'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "util": false }


ERROR in ./node_modules/jws/lib/sign-stream.js 8:13-30

Module not found: Error: Can't resolve 'stream' in 'C:\Users\client\node_modules\jws\lib'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "stream": require.resolve("stream-browserify") }'
    - install 'stream-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "stream": false }


ERROR in ./node_modules/jws/lib/sign-stream.js 12:11-26

Module not found: Error: Can't resolve 'util' in 'C:\Users\client\node_modules\jws\lib'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "util": require.resolve("util/") }'
    - install 'util'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "util": false }


ERROR in ./node_modules/jws/lib/verify-stream.js 8:13-30

Module not found: Error: Can't resolve 'stream' in 'C:\Users\client\node_modules\jws\lib'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "stream": require.resolve("stream-browserify") }'
    - install 'stream-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "stream": false }


ERROR in ./node_modules/jws/lib/verify-stream.js 12:11-26

Module not found: Error: Can't resolve 'util' in 'C:\Users\client\node_modules\jws\lib'

BREAKING CHANGE: webpack < 5 used to include polyfills for node.js core modules by default.
This is no longer the case. Verify if you need this module and configure a polyfill for it.

If you want to include a polyfill, you need to:
    - add a fallback 'resolve.fallback: { "util": require.resolve("util/") }'
    - install 'util'
If you don't want to include a polyfill, you can use an empty module like this:
    resolve.fallback: { "util": false }

注意：我尝试执行错误所说的建议，但它并不能解决问题

Answer 1

jsonwebtokens是一个用于node.js 的JWT 库，不适用于浏览器中的JS。尝试 JavaScript 下列出的库之一： https ://jwt.io/libraries?language=JavaScript