模塊未發現：錯誤：無法解析「@週期/運行」的WebPack 2.2.1

Question

我想使用的WebPack 2.2.1

我得到這個錯誤cycle.js運行Hello World應用程式：

ERROR in ./app/index.js Module not found: Error: Can't resolve '@cycle/run' in '/Users/Ben/proj/sb_vol_calc/frontend/app' @ ./app/index.js 7:11-32 @ multi webpack-dev-server/client? http://localhost:3000 ./app/index

這裏是我的webpack.config.js：

var path = require('path') 
var webpack = require('webpack') 

module.exports = { 
    devtool: 'eval', 
    entry: [ 
    'webpack-dev-server/client?http://localhost:3000', 
    './app/index' 
    ], 
    output: { 
    path: path.join(__dirname, 'dist'), 
    filename: 'bundle.js' 
    }, 
    module: { 
    rules: [ 
     { 
     test: /\.js$/, 
     use: { 
      loader: 'babel-loader' 
     } 
     } 
    ] 
    }, 
    resolve: { 
    extensions: ['.js'], 
    modules: [ 
     path.join(__dirname, 'src'), 
     "node_modules" 
    ] 
    } 
} 

的package.json：

{ 
    "name": "xxx", 
    "version": "1.0.0", 
    "main": "index.js", 
    "license": "MIT", 
    "scripts": { 
    "start": "node server.js", 
    "test": "echo \"Error: no test specified\" && exit 1" 
    }, 
    "babel": { 
    "presets": [ 
     "es2015", 
     "react", 
     "stage-0" 
    ] 
    }, 
    "devDependencies": { 
    "babel-core": "^6.23.1", 
    "babel-loader": "^6.3.2", 
    "babel-preset-es2015": "^6.22.0", 
    "babel-preset-react": "^6.23.0", 
    "babel-preset-stage-0": "^6.22.0", 
    "webpack": "^2.2.1", 
    "webpack-dev-server": "^2.4.1" 
    }, 
    "dependencies": { 
    "@cycle/dom": "^14.3.0", 
    "@cycle/xstream-run": "^4.2.0", 
    "xstream": "^10.2.0" 
    } 
} 

我已經運行npm install。它現在應該工作嗎？或者我錯過了什麼？

index.js：

import xs from 'xstream'; 
import {run} from '@cycle/run'; 
import {makeDOMDriver, h1} from '@cycle/dom'; 

function main() { 
    const sinks = { 
    DOM: xs.periodic(1000).map(i => 
     h1('' + i + ' seconds elapsed') 
    ) 
    }; 
    return sinks; 
} 

const drivers = { 
    DOM: makeDOMDriver('#root') 
}; 

run(main, drivers); 

Answer 1

您沒有安裝@cycle/run作爲依賴關係，但@cycle/xstream-run。所以，你必須從它導入run：

import {run} from '@cycle/xstream-run'; 

按照latest release@cycle/xstream-run已更名爲@cycle/run，所以你應該開始使用它。你需要做的就是安裝它：

npm install --save @cycle/run