webpack 执行 npm run dev 报错

Question

>vue_demo@1.0.0devG:\WWW\VueThink\vue_demo>cross-envNODE_ENV=developmentwebpack-dev-server--configwebpack.config.jsG:\WWW\VueThink\vue_demo\node_modules\ajv-keywords\keywords\instanceof.js:52thrownewError('invalid"instanceof"keywordvalue'+c);^Error:invalid"instanceof"keywordvaluePromiseatgetConstructor(G:\WWW\VueThink\vue_demo\node_modules\ajv-keywords\keywords\instanceof.js:52:11)atAjv.compile(G:\WWW\VueThink\vue_demo\node_modules\ajv-keywords\keywords\instanceof.js:21:27)atObject.useCustomRule(G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\compile\index.js:275:26)atObject.generate_custom[ascode](G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\dotjs\custom.js:32:24)atObject.generate_validate[asvalidate](G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\dotjs\validate.js:347:35)atObject.generate_anyOf[ascode](G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\dotjs\anyOf.js:34:27)atgenerate_validate(G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\dotjs\validate.js:347:35)atlocalCompile(G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\compile\index.js:87:22)atAjv.compile(G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\compile\index.js:56:13)atAjv._compile(G:\WWW\VueThink\vue_demo\node_modules\ajv\lib\ajv.js:358:27)npmERR!codeELIFECYCLEnpmERR!errno1npmERR!vue_demo@1.0.0dev:`cross-envNODE_ENV=developmentwebpack-dev-server--configwebpack.config.js`npmERR!Exitstatus1npmERR!npmERR![e-mail]!Thisisprobablynotaproblemwithnpm.Thereislikelyadditionalloggingoutputabove.npmERR!Acompletelogofthisruncanbefoundin:npmERR!C:\Users\think\AppData\Roaming\npm-cache\_logs\2018-03-21T01_22_03_259Z-debug.log版本是webpack@3.10.0，安装了webpack-dev-server运行npmrundev时报错了这是什么问题啊，求解

Answer 1

webpack-dev-server的版本是不是太高了，可以降低版本试一下，我用的版本是"webpack-dev-server":"^2.9.7"
                            

Answer 2

上面大哥说的是正确的降低一些webpack-dev-server的版本就好了webpack-dev-server@2.9.7就完全ok