webpack-cli ERROR：Unexpected token =

[cleverlion]

When starting the project，webpack-cli throws an error：
SyntaxError: Unexpected token =

The configuration in the .babelrc file is:
{ "presets": [ ["env", { "modules": false }], "stage-2", "es2015" ], "plugins": ["transform-runtime"], "comments": false }

`[webpack-cli] D:\lifeRestart\my-project\node_modules\webpack-dev-server\lib\servers\WebsocketServer.js:10
static heartbeatInterval = 1000;
^

SyntaxError: Unexpected token =
at new Script (vm.js:83:7)
at NativeCompileCache._moduleCompile (D:\lifeRestart\my-project\node_modules\v8-compile-cache\v8-compile-cache.js:240:18)
at Module._compile (D:\lifeRestart\my-project\node_modules\v8-compile-cache\v8-compile-cache.js:184:36)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
at Module.load (internal/modules/cjs/loader.js:653:32)
at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
at Function.Module._load (internal/modules/cjs/loader.js:585:3)
at Module.require (internal/modules/cjs/loader.js:692:17)
at require (D:\lifeRestart\my-project\node_modules\v8-compile-cache\v8-compile-cache.js:159:20)
at Server.getServerTransport (D:\lifeRestart\my-project\node_modules\webpack-dev-server\lib\Server.js:982:28)`

[jayzun]

webpack-dev-server使用了新的定义class成员的语法，你可以升级你的node版本试试

[cleverlion]

webpack-dev-server使用了新的定义class成员的语法，你可以升级你的node版本试试

好的谢谢

[g1un]

Just translated @jayzun answer, it helped me.
webpack-dev-server uses a new syntax to define class members,you can upgrade your node version to try

[jadeshenker]

@g1un what version did you need to update to?

[rubangarmon]

Same problem. I'm using webpack serve --config ./webpack.config.ts

[joergkrause]

Definitely upgrading NodeJs helps. The static variables syntax is available in Node 6, but the static class variable that's used here is available in Node 12.6. Going to the latest LTS is recommended to solve the issue.