React - 状态对象中的意外标记

Question

我正在学习 React JS 并面临以下问题。

我在 npm 启动后收到意外的令牌错误。我在状态对象中有简单的数组。我检查了 package.json 中是否存在 eslintConfig 设置，但为什么会出现此错误？

错误-

下面是package.json设置-

{
  "name": "react-app-1",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "@testing-library/jest-dom": "^5.12.0",
    "@testing-library/react": "^11.2.6",
    "@testing-library/user-event": "^12.8.3",
    "bootstrap": "^4.1.1",
    "i": "^0.3.6",
    "react": "^17.0.2",
    "react-dom": "^17.0.2",
    "react-scripts": "4.0.3",
    "web-vitals": "^1.1.1"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "eslintConfig": {
    "extends": [
      "react-app",
      "react-app/jest"
    ]
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

Answer 1

您必须在对象内部使用 : 进行声明

state = {
    tags: ['tag1','tag2']
}

Answer 2

很简单

修改

这个=>

let state = {
tags = ['tag1', 'tag2']
}

至 =>

let state = {
tags : ['tag1', 'tag2']
}

React - 状态对象中的意外标记

React - unexpected token in state object

reactjs

eslint

package.json