2-dev.md

Configuration of Development Mode

configure dev-server

• Create .webpack.config.dev.js file that is include just Development Mode configurations in root folder.

• add command ``start ``` to scripts in package.json to start application in Development Mode.

    "start": "webpack-dev-server --config webpack.config.dev.js --colors --port 8080"

• Install webpack-dev-server library

    npm install --save-dev webpack-dev-server@1.14.1

* type http://localhost:8080 and now you can see the folder structure of root path.  
That's mean webpack-server is running now.

install html-webpack-plugin

npm instal --save-dev html-webpack-plugin@2.17.0

install eslint

npm instal --save-dev eslint@2.9.0
npm instal --save-dev babel-eslint@6.0.2
npm instal --save-dev eslint-config-airbnb@9.0.1
npm instal --save-dev eslint-import-resolver-webpack@0.2.4
npm instal --save-dev eslint-loader@1.3.0
npm instal --save-dev eslint-plugin-flowtype@2.2.7
npm instal --save-dev eslint-plugin-import@1.8.0
npm instal --save-dev eslint-plugin-jsx-a11y@1.2.0
npm instal --save-dev eslint-plugin-react@5.1.1

eslint configuration

• add eslint loader to dev configuration file as a preloader.

/**
 * @link https://github.com/MoOx/eslint-loader
 * added eslint-loader plugin for check the syntax of code by rules
 */
commonSettings.module.preLoaders.push({ test: /\.jsx?$/, loaders: ['eslint'], exclude: /node_modules/ });
commonSettings.eslint = {
    eslint: {
        failOnWarning: false,
        failOnError: true
    }
};

• create .eslintrc file in root directory and add below json code to the file.

{
    "extends": ["eslint-config-airbnb"],
    "env": {
        "browser": true,
        "node": true
    },
    "ecmaFeatures": {
        "jsx": true
    },
    "parser": "babel-eslint",
    "plugins": [
        "react",
        "babel",
        "flowtype"
    ],
    "rules": {
        "quotes": [2, "double", "avoid-escape"],
        "constructor-super": 2,
        "comma-dangle": 0,
        "eqeqeq": [2, "allow-null"],
        "id-length": 0,
        "indent": [2, 4],
        "no-eq-null": 0,
        "one-var": [2, { "initialized": "never" }],
        "prefer-const": 0,
        "no-param-reassign": 0,
        "no-this-before-super": 2,
        "babel/object-shorthand": 2,
        "react/jsx-boolean-value": 2,
        "react/jsx-indent": [1,4],
        "react/jsx-no-duplicate-props": 2,
        "react/sort-comp": 0,
        "react/prop-types": [2, { "ignore": [
            "children",
            "className",
            "style",
            "bsStyle",
            "bsClass",
            "bsSize"
        ]
        }],
        "flowtype/require-parameter-type": 1,
        "flowtype/require-return-type": [
            1,
            "always",
            {
                "annotateUndefined": "never"
            }
        ],
        "flowtype/space-after-type-colon": [
            1,
            "always"
        ],
        "flowtype/space-before-type-colon": [
            1,
            "never"
        ],
        "flowtype/type-id-match": [
            1,
            "^([A-Z][a-z0-9]+)+Type$"
        ]
    },
    "settings": {
        "import/resolver":{
            "webpack": {
                "config": "webpack.config.common.js"
            }
        }
    }
}

install flowcheck

npm install flowcheck flowcheck-loader --save-dev

integrate flowcheck with eslint

npm install eslint-plugin-flowtype --save-dev

install html-webpack-plugin

npm install html-webpack-plugin --save-dev

• add below code to webpack.config.dev.js

var webpack = require("webpack");

/**
 * import common webpack settings
 */
const commonSettings = require('./webpack.config.common.js');

/**
 * @link https://webpack.github.io/docs/configuration.html#cache
 * Cache generated modules and chunks to improve performance for multiple incremental builds.
 This is enabled by default in watch mode.
 * @type {boolean}
 */
commonSettings.cache = true;

/**
 * @link https://webpack.github.io/docs/configuration.html#debug
 * Switch loaders to debug mode.
 * @type {boolean}
 */
commonSettings.debug = true;

/**
 * @link https://webpack.github.io/docs/configuration.html#devtool
 * Choose a developer tool to enhance debugging.
 * source-map - A SourceMap is emitted. See also output.sourceMapFilename.
 * @type {string}
 */
commonSettings.devtool = 'source-map';

/**
 * @link https://webpack.github.io/docs/configuration.html#entry
 * The entry point for the bundle.
 * If you pass a string: The string is resolved to a module which is loaded upon startup.
**/
commonSettings.entry = {
    app:[commonSettings.paths.app]
};


/**
 * @link https://github.com/MoOx/eslint-loader
 * added eslint-loader plugin for check the syntax of code by rules
 */

commonSettings.module.preLoaders.push({ test: /\.jsx?$/, loaders: ['eslint'], exclude: /node_modules/ });
commonSettings.eslint = {
        configFile: '.eslintrc',
        failOnWarning: false,
        failOnError: true
};


/**
 * @link https://webpack.github.io/docs/hot-module-replacement-with-webpack.html
 * @type {HotModuleReplacementPlugin}
 */
commonSettings.plugins.push(new webpack.HotModuleReplacementPlugin());

/**
 *
 * @link https://github.com/ampedandwired/html-webpack-plugin
 * @type {HtmlWebpackPlugin|exports|module.exports}
 */
var HtmlWebpackPlugin = require('html-webpack-plugin');

commonSettings.plugins.push(new HtmlWebpackPlugin({
    template: commonSettings.paths.assets + '/index.html'
}));

module.exports = commonSettings;