ruby-on-rails – 使用Webpacker的React Rails不热重新加载

发布时间：2020-12-17 02:10:26 所属栏目：百科来源：网络整理

导读：我已经在现有项目中添加了react-rails,我们正在慢慢迁移以做出反应. 目前的webpacker.yml default: default source_path: app/javascript source_entry_path: packs public_output_path: packs cache_path: tmp/cache/webpacker # Additional paths webpack

我已经在现有项目中添加了react-rails,我们正在慢慢迁移以做出反应.

目前的webpacker.yml

default: &default
  source_path: app/javascript
  source_entry_path: packs
  public_output_path: packs
  cache_path: tmp/cache/webpacker

  # Additional paths webpack should lookup modules
  # ['app/assets','engine/foo/app/assets']
  resolved_paths: []

  # Reload manifest.json on all requests so we reload latest compiled packs
  cache_manifest: false

  extensions:
    - .jsx
    - .js
    - .sass
    - .scss
    - .css
    - .module.sass
    - .module.scss
    - .module.css
    - .png
    - .svg
    - .gif
    - .jpeg
    - .jpg
    - .tsx
    - .ts

development:
  <<: *default
  compile: true

  # Reference: https://webpack.js.org/configuration/dev-server/
  dev_server:
    https: false
    host: localhost
    port: 3035
    public: localhost:3035
    hmr: true
    # Inline should be set to true if using HMR
    inline: true
    overlay: true
    compress: true
    disable_host_check: true
    use_local_ip: false
    quiet: false
    headers:
      'Access-Control-Allow-Origin': '*'
    watch_options:
      ignored: /node_modules/

我在一个终端启动rails应用程序,在另一个终端启动./bin/webpack-dev-server,我可以看到编译中出现的热模块：

[./node_modules/webpack-dev-server/client/index.js?http://localhost:3035] (webpack)-dev-server/client?http://localhost:3035 7.93 kB {0} {1} [built]
[./node_modules/webpack-dev-server/client/overlay.js] (webpack)-dev-server/client/overlay.js 3.67 kB {0} {1} [built]
[./node_modules/webpack/hot/dev-server.js] (webpack)/hot/dev-server.js 1.61 kB {0} {1} [built]
[./node_modules/webpack/hot/emitter.js] (webpack)/hot/emitter.js 77 bytes {0} {1} [built]
[./node_modules/webpack/hot/log-apply-result.js] (webpack)/hot/log-apply-result.js 1.31 kB {0} {1} [built]
[./node_modules/webpack/hot/log.js] (webpack)/hot/log.js 1.04 kB {0} {1} [built]
   [0] multi (webpack)-dev-server/client?http://localhost:3035 webpack/hot/dev-server ./app/javascript/packs/application.js 52 bytes {1} [built]
   [1] multi (webpack)-dev-server/client?http://localhost:3035 webpack/hot/dev-server ./app/javascript/packs/server_rendering.js 52 bytes {0} [built]

问题是我正在运行./bin/webpack-dev-server我每次更新反应文件时都会刷新整页(而不是刚更新的组件).只有在dev服务器运行时才会刷新整页.此外,在整页刷新之前,我没有看到组件更新.

所以问题是,为什么webpack-dev-server发信号通知浏览器页面刷新,为什么组件不热重新加载？

解决方法

这就是Webpack HMR的工作原理,如果你想在你的反应模块上启用HMR,你可以试试 React Hot Loader和 Webpack plugin

.用纱线安装反应装置

.编辑.babelrc文件并将react-hot-loader / babel添加到插件列表中.

.使您的React组件“热”.

import React from 'react'
import { hot } from 'react-hot-loader'

class Example extends React.Component {
}

export default hot(module)(Example);

（编辑：李大同）

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