notes-reactjs.md

setup a React + Typescript app

https://www.typescriptlang.org/docs/handbook/react-&-webpack.html

upgrade npm to the latest release

• npm install -g npm@next
• if npx isn't found install that globally too: npm install -g npx (wasn't present on my Azure app service VM even though node & npm were current)

initial app creation

1. npm init -u
2. npm install --save-dev webpack webpack-cli
3. npm install --save react react-dom react-redux rxjs
4. npm install --save-dev @types/react @types/react-dom @types/react-redux
5. npm install --save-dev typescript awesome-typescript-loader source-map-loader

configure the typescript compiler: tsconfig.json

{
    "compilerOptions": {
        "outDir": "./dist/",
        "sourceMap": true,
        "noImplicitAny": true,
        "module": "commonjs",
        "target": "es6",
        "jsx": "react"
    }
}

configure webpack: webpack.config.js

module.exports = {
    mode: "production",

    // Enable sourcemaps for debugging webpack's output.
    devtool: "source-map",

    resolve: {
        // Add '.ts' and '.tsx' as resolvable extensions.
        extensions: [".ts", ".tsx"]
    },

    module: {
        rules: [
            {
                test: /\.ts(x?)$/,
                exclude: /node_modules/,
                use: [
                    {
                        loader: "awesome-typescript-loader"
                    }
                ]
            },
            // All output '.js' files will have any sourcemaps re-processed by 'source-map-loader'.
            {
                enforce: "pre",
                test: /\.js$/,
                loader: "source-map-loader"
            }
        ]
    },

    // When importing a module whose path matches one of the following, just
    // assume a corresponding global variable exists and use that instead.
    // This is important because it allows us to avoid bundling all of our
    // dependencies, which allows browsers to cache those libraries between builds.
    externals: {
        "react": "React",
        "react-dom": "ReactDOM"
    }
};

build it

npx webpack --mode development

run it locally

1. npm i local-web-server -g
2. ws --spa index.html see https://github.com/lwsjs/local-web-server/wiki/CLI-usage