Question

我正在学习reactjs-Node.js 我试图运行服务器，所以我安装了yarn，nodemon，express 但是当我尝试说出自己的话错误命令失败，退出代码为1。

我的错误是

    PS D:\react project\ReactManagement-tutorial> yarn dev
yarn run v1.13.0
warning package.json: No license field
$ concurrently --kill-others-on-fail "yarn server" "yarn client"
warning package.json: No license field
warning package.json: No license field
$ nodemon server.js
$ cd client && yarn start
warning ..\package.json: No license field
$ react-scripts start
[1] 'react-scripts'��(��) ���� �Ǵ� �ܺ� ����, ���
��� �� �ִ� ���α׷�, �Ǵ�
[1] ��ġ ������ �ƴմϴ�.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
error Command failed with exit code 1.
[1] yarn client exited with code 1
--> Sending SIGTERM to other processes..
[0] yarn server exited with code 1
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
PS D:\react project\ReactManagement-tutorial>

我的package.json是

{
    "name": "management",
    "version": "1.0.0",
    "scripts": {
        "client": "cd client && yarn start",
        "server": "nodemon server.js",
        "dev": "concurrently --kill-others-on-fail \"yarn server\" \"yarn client\""
    },
    "dependencies": {
        "body-parser": "^1.18.3",
        "express": "^4.16.4",
        "nodemon": "^1.18.10"
    },
    "devDependencies": {
        "concurrently": "^4.1.0"
    }
}

及其我的server.js

const express = require('express');
const bodyParser = require('body-parser');  //서버모듈을위한 
const app = express();
const port = process.env.PORT || 5000;  

app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended:true})); 

app.get('/api/hello',(req,res) =>{  
    res.send({message : 'hello express!'});  
});
app.listen(port,()=>console.log(`listening on port ${port}`))

Answer 1

您需要做的很简单：请按照以下步骤操作：

rm -rf node_modules
清理纱线缓存
纱线
纱线开始

Answer 2

您可能面临的问题之一是，如果其他服务器也正在运行，则服务器将无法启动。例如。我运行了XAMP，因此我的纱线无法启动。检查一次。

Answer 3

尝试一下：

1。重新安装node.js

2。重新安装VSC（如果使用的话）

3。转到cmd并运行：

npx create-react-app app-name
cd app-name
yarn start

4。通过http：// localhost：3000

打开您的应用

5.Close cmd

6。打开VSC并运行相同的命令：

yarn start

，应用正在运行！我希望我的解决方案能对某人有所帮助。

Answer 4

我遇到了同样的错误，并通过

将其修复

删除yarn_lock.json
删除node_modules/
sudo apt-get update && apt-get install --only-upgrade yarn或sudo apt-get upgrade
然后重做yarn install文件夹中的yarn run和yarn build或package.json

如果上面没有帮助

尝试安装最新的node.js
删除node_modules/和lock文件
使用npm install和npm run-script

Answer 5

这应该有效：

yarn add yarn

错误命令失败，退出代码为1。当我尝试运行yarn时

5 个答案: