我是 Web3 的新手,我正在尝试创建一个与 web3 集成的 React 应用程序。以下是我在 Ubuntu 中遵循的步骤。
create-react-app app_name
cd app_name
npm i --save web3
npm start
一切正常,我得到了反应应用程序主页。
现在,只要我将以下代码行放入 App.js 中,应用程序就会崩溃,并收到以下长错误。 (见下文,第 5 行)
import Web3 from "web3";
我得到的错误如下。
Compiled with problems:X
ERROR in ./node_modules/cipher-base/index.js 3:16-43
Module not found: Error: Can't resolve 'stream' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/cipher-base'
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/eth-lib/lib/bytes.js 9:193-227
Module not found: Error: Can't resolve 'crypto' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/eth-lib/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: { "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/ethereumjs-util/dist.browser/account.js 71:31-48
Module not found: Error: Can't resolve 'assert' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/ethereumjs-util/dist.browser'
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: { "assert": require.resolve("assert/") }'
- install 'assert'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "assert": false }
ERROR in ./node_modules/ethereumjs-util/dist.browser/address.js 14:31-48
Module not found: Error: Can't resolve 'assert' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/ethereumjs-util/dist.browser'
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: { "assert": require.resolve("assert/") }'
- install 'assert'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "assert": false }
ERROR in ./node_modules/ethereumjs-util/dist.browser/object.js 46:31-48
Module not found: Error: Can't resolve 'assert' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/ethereumjs-util/dist.browser'
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: { "assert": require.resolve("assert/") }'
- install 'assert'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "assert": false }
ERROR in ./node_modules/web3-eth-accounts/lib/index.js 31:74-91
Module not found: Error: Can't resolve 'crypto' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/web3-eth-accounts/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: { "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/web3-eth-accounts/node_modules/eth-lib/lib/bytes.js 7:193-227
Module not found: Error: Can't resolve 'crypto' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/web3-eth-accounts/node_modules/eth-lib/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: { "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/web3-providers-http/lib/index.js 30:11-26
Module not found: Error: Can't resolve 'http' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/web3-providers-http/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: { "http": require.resolve("stream-http") }'
- install 'stream-http'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "http": false }
ERROR in ./node_modules/web3-providers-http/lib/index.js 32:12-28
Module not found: Error: Can't resolve 'https' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/web3-providers-http/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: { "https": require.resolve("https-browserify") }'
- install 'https-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "https": false }
ERROR in ./node_modules/web3-providers-ws/lib/helpers.js 11:12-26
Module not found: Error: Can't resolve 'url' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/web3-providers-ws/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: { "url": require.resolve("url/") }'
- install 'url'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "url": false }
ERROR in ./node_modules/xhr2-cookies/dist/xml-http-request.js 37:11-26
Module not found: Error: Can't resolve 'http' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/xhr2-cookies/dist'
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: { "http": require.resolve("stream-http") }'
- install 'stream-http'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "http": false }
ERROR in ./node_modules/xhr2-cookies/dist/xml-http-request.js 39:12-28
Module not found: Error: Can't resolve 'https' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/xhr2-cookies/dist'
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: { "https": require.resolve("https-browserify") }'
- install 'https-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "https": false }
ERROR in ./node_modules/xhr2-cookies/dist/xml-http-request.js 41:9-22
Module not found: Error: Can't resolve 'os' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/xhr2-cookies/dist'
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: { "os": require.resolve("os-browserify/browser") }'
- install 'os-browserify'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "os": false }
ERROR in ./node_modules/xhr2-cookies/dist/xml-http-request.js 43:10-24
Module not found: Error: Can't resolve 'url' in '/home/gkv/Stuff/Tutorial/Projects/react/lottery-react-new/node_modules/xhr2-cookies/dist'
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: { "url": require.resolve("url/") }'
- install 'url'
If you don't want to include a polyfill, you can use an empty module like this:
resolve.fallback: { "url": false }
我尝试了多个 stackoverflow 帖子,但似乎都没有正确的解决方案。
- React 和 Angular 中的错误库 web3 和 Webpack [关闭] https://stackoverflow.com/questions/70382479/error-library-web3-and-webpack-in-react-and-angular
- 找不到模块:错误:无法解析“C:\dev\jszip-test\node_modules\jszip\lib”中的“流” https://stackoverflow.com/questions/55601669/module-not-found-error-cant-resolve-stream-in-c-dev-jszip-test-node-modul
- 我在 React js 17.0.1 中从 web3 导入 Web3 时收到此错误。如何解决此问题 https://stackoverflow.com/questions/70401928/i-am-getting-this-error-whilr-importing-web3-from-web3-in-react-js-17-0-1-how-to
如果有人可以提供帮助那就太好了。我已经为此苦苦挣扎了5天。