webpack热更新无效解决,页面无刷新

问题：控制台输出, 但页面内容并没有进行热加载

[WDS] App updated. Recompiling...
[WDS] App hot update...
...

报错： 

Error: Cannot find module 'webpack-cli/bin/config-yargs'
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:580:15)
at Function.Module._load (internal/modules/cjs/loader.js:506:25)
at Module.require (internal/modules/cjs/loader.js:636:17)
at require (internal/modules/cjs/helpers.js:20:18)
at Object.<anonymous> (E:webpacknode_modules_webpack-dev-server@3.1.14@webpack-dev-serverbinwebpack-dev-server.js:84:1)
at Module._compile (internal/modules/cjs/loader.js:688:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:699:10)
at Module.load (internal/modules/cjs/loader.js:598:32)
at tryModuleLoad (internal/modules/cjs/loader.js:537:12)
at Function.Module._load (internal/modules/cjs/loader.js:529:3)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! wp@1.0.0 dev: `webpack-dev-server`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the wp@1.0.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!
C:UsersAdministratorAppDataRoamingnpm-cache_logs2019-02-15T13_59_30_515Z-debug.log

解决：这种情况下一般是webpack版本与webpack-dev-server版本不兼容的问题， 这个时候我们不仅需要检查开发环境所需的webpack版本号与webpack-dev-server号，还要检查生产环境的webpack-dev-server是否一致，不一致则改为一致。

// 查看webpack-dev-server是否一致
"devDependencies": {
...
"webpack": "^3.11.0",
"webpack-dev-server": "^2.11.1",
...
},
"dependencies": {
...
"webpack-dev-server": "^2.11.1",
...
}

到此，可以把项目跑起来，实现热更新。

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