because the version of node you are using does not support the async/await feature for the time being
if you run it on the command line and you want it to support the async/await function, it usually runs like this
node --harmony index.jsbut if it is executed in npm, such as the following configuration
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1",
"serve": "serve ."
}npm run serve because the serve module uses the async/await function, it will report an error
so how can you easily turn on the function of-- harmony in the configuration file and try not to modify the information in the script configuration