目录

• 出错现象
• 出错原因
• 解决方案

出错现象

这个报错在环境中安装了gulp-eslint，eslint并初始化之后，在gulp中使用的时候报的错误。

Error: .eslintrc.js » eslint-config-standard:
        Environment key "es2021" is unknown

alidator.js:169:19
    at Array.forEach (<anonymous>)
    at validateEnvironment (E:\professer\lagou\ESLint\csf-gulp-demo-master\node_modules\gulp-eslint\node_modules\eslint\lib\shared\config-validator.js:163:30)
    at validateConfigArray (E:\professer\lagou\ESLint\csf-gulp-demo-master\node_modules\gulp-eslint\node_modules\eslint\lib\shared\config-validator.js:334:9)
    at CascadingConfigArrayFactory._finalizeConfigArray (E:\professer\lagou\ESLint\csf-gulp-demo-master\node_modules\gulp-eslint\node_modules\eslint\lib\cli-engine\cascading-config-array-factory.js:417:13)
    at CascadingConfigArrayFactory.getConfigArrayForFile (E:\professer\lagou\ESLint\csf-gulp-demo-master\node_modules\gulp-eslint\node_modules\eslint\lib\cli-engine\cascading-config-array-factory.js:271:21)
    at CLIEngine.isPathIgnored (E:\professer\lagou\ESLint\csf-gulp-demo-master\node_modules\gulp-eslint\node_modules\eslint\lib\cli-engine\cli-engine.js:951:18)
    at Transform._transform (E:\professer\lagou\ESLint\csf-gulp-demo-master\node_modules\gulp-eslint\index.js:43:14)  
    at Transform._read (_stream_transform.js:191:10)
    at Transform._write (_stream_transform.js:179:12)

出错原因

是版本的问题，因为使用的gulp-eslint版本和eslint以及eslint-config-standard版本不兼容导致的错误

之前的版本是

• node -v —— v12.19.0
• npm -v —— v6.14.8
• gulp -v —— ^4.0.2
• gulp-eslint -v—— ^6.0.0
• eslint -v—— ^7.12.1
• eslint-config-standard -v—— ^16.0.1

解决方案

1. 将eslint-config-standard版本进行降级为^14.1.1，npm i eslint-config-standard@14.1.1 eslint-plugin-standard -D
2. 删除.eslintrc.js里面的env中的es2021属性

it works~