Reactjs 项目启动的问题

Reactjs 项目启动的问题,reactjs,npm,gulp,environment-variables,Reactjs,Npm,Gulp,Environment Variables,无法运行项目 当您输入“gulp default”时,不会发生错误 当您输入“发球”时,将显示此错误: Browserify Error { Error: Using `babel-preset-react-app` requires that you specify `NODE_ENV` or `BABEL_ENV` environment variables. Valid values are "development", "test", and "production". Instead,

无法运行项目
当您输入“gulp default”时,不会发生错误
当您输入“发球”时,将显示此错误:

Browserify Error { Error: Using `babel-preset-react-app` requires that you
specify `NODE_ENV` or `BABEL_ENV` environment variables. Valid values are
"development", "test", and "production". Instead, received: undefined.
While processing preset:
"C:\\OpenServer\\domains\\yarmobile.local\\node_modules\\babel-preset-react-
app\\index.js") while parsing file:
C:\OpenServer\domains\yarmobile.local\src\app\main.js

您的gulp文件应该包含下面提到的任务

gulp.task('serve', ['set-development']);
gulp.task('default', ['serve']);

有什么问题吗?错误似乎很明显。指定
NODE_ENV
BABEL_ENV
.gulpfile.js gulp.task('set-production',function(){process.ENV.NODE_ENV='production';});task('set-development',function(){process.env.NODE_env='development';});您设置的开发任务名称是否包含在默认任务数组中?