Question

我已经搜索了以前的答案，并试图解决了许多小时，但没有成功。我输入了终端npm create-react-app，移到了正确的CD，它给了我这个错误：

'npm ERR！缺少脚本：开始'

这是我的package.json

{
  "name": "react-project",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-scripts": "3.4.1"
  }

}

对我来说这没有意义。帮助吗？

Answer 1

您的package.json缺少start脚本。应该是

{
  "name": "react-project",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "react": "^16.13.1",
    "react-dom": "^16.13.1",
    "react-scripts": "3.4.1"
  },
  "scripts": {
    "start": "react-scripts start"
  },
}

react-scripts start是启动应用程序的命令。

此外，您运行了不正确的命令。应该是

npx create-react-app my-app

Answer 2

不确定您是做什么的还是由什么原因引起的，但是您缺少程序包中应由create-react-app生成的脚本：

"scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },

啊，明白了。您使用了错误的命令：

npm react-create-app

仅初始化您的package.json。您应该运行：

npm create-react-app

Answer 3

将以下内容添加到您的 package.json：

import java.awt.*;
import java.applet.*;
import java.util.*;

class Background
{
    public static void showBackground(Graphics g)
    {
     drawWall(Graphics g);
     drawTable(Graphics g);
     drawTank(Graphics g);
    }
    
    private static void drawWall(Graphics g)
    {
     Expo.setColor(g,Expo.tan);
     Expo.fillRectangle(g,0,0,1000,650);
    }
    
    private static void drawTable(Graphics g)
    {
     Expo.setColor(g,Expo.brown);
     Expo.fillRectangle(g,125,450,175,650);
     Expo.fillRectangle(g,250,450,300,650);    
     Expo.fillRectangle(g,700,450,750,650);
     Expo.fillRectangle(g,825,450,875,650);
     Expo.fillPolygon(g,125,450,225,300,775,300,875,450);
    }
    
     private static void drawTank(Graphics g)
    {
     Expo.setColor(g,Expo.blue);
     Expo.fillRectangle(g, 250,75,750,400);
    }
}

npm ERR！缺少脚本：启动（react.js）

3 个答案: