Add example code for 3.2

Author: adamwathan

03-building-a-responsive-navbar/02-toggling-the-nav-links-on-mobile/.gitignore

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+.DS_Store
+node_modules
+/dist
+
+# local env files
+.env.local
+.env.*.local
+
+# Log files
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Editor directories and files
+.idea
+.vscode
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

03-building-a-responsive-navbar/02-toggling-the-nav-links-on-mobile/README.md

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+# 3.1 Laying out the elements with Flexbox
+
+This lesson is built as a simple [Vue CLI](https://cli.vuejs.org/) app to better represent how a real-world project might be set up.
+
+To get started, `cd` into this subfolder and run `npm install` to install the dependencies.
+
+Use `npm run serve` to start the development server, or `npm run build` to compile the production assets to the `dist` folder.

03-building-a-responsive-navbar/02-toggling-the-nav-links-on-mobile/babel.config.js

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+module.exports = {
+  presets: [
+    '@vue/app'
+  ]
+}

03-building-a-responsive-navbar/02-toggling-the-nav-links-on-mobile/package-lock.json

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+{
+  "name": "my-tailwind-project",
+  "version": "0.1.0",
+  "private": true,
+  "scripts": {
+    "serve": "vue-cli-service serve",
+    "build": "vue-cli-service build",
+    "lint": "vue-cli-service lint"
+  },
+  "dependencies": {
+    "@fullhuman/postcss-purgecss": "^1.2.0",
+    "autoprefixer": "^9.6.1",
+    "core-js": "^2.6.5",
+    "tailwindcss": "^1.1.0",
+    "vue": "^2.6.10"
+  },
+  "devDependencies": {
+    "@vue/cli-plugin-babel": "^3.9.0",
+    "@vue/cli-plugin-eslint": "^3.9.0",
+    "@vue/cli-service": "^3.9.0",
+    "babel-eslint": "^10.0.1",
+    "eslint": "^5.16.0",
+    "eslint-plugin-vue": "^5.0.0",
+    "vue-template-compiler": "^2.6.10"
+  },
+  "eslintConfig": {
+    "root": true,
+    "env": {
+      "node": true
+    },
+    "extends": [
+      "plugin:vue/essential",
+      "eslint:recommended"
+    ],
+    "rules": {},
+    "parserOptions": {
+      "parser": "babel-eslint"
+    }
+  },
+  "browserslist": [
+    "> 1%",
+    "last 2 versions"
+  ]
+}

03-building-a-responsive-navbar/02-toggling-the-nav-links-on-mobile/package.json

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+module.exports = {
+  plugins: [
+    require('tailwindcss'),
+    require('autoprefixer'),
+    process.env.NODE_ENV === 'production' && require('@fullhuman/postcss-purgecss')({
+      content: [
+        './src/**/*.vue',
+        './public/index.html',
+      ],
+      defaultExtractor: content => content.match(/[A-Za-z0-9-_:/]+/g) || []
+    })
+  ]
+}