fix: Add missing lang attribute on HTML element

Fixes #879 #1668

package.json

@@ -29,7 +29,7 @@
   },
   "dependencies": {
     "@tippyjs/react": "4.1.0",
-    "@vxna/mini-html-webpack-template": "^1.0.0",
+    "@vxna/mini-html-webpack-template": "^2.0.0",
     "acorn": "^6.4.1",
     "acorn-jsx": "^5.1.0",
     "ast-types": "~0.13.2",
@@ -67,7 +67,7 @@
     "lodash": "^4.17.15",
     "lowercase-keys": "^2.0.0",
     "markdown-to-jsx": "^6.11.4",
-    "mini-html-webpack-plugin": "^2.0.0",
+    "mini-html-webpack-plugin": "^3.1.3",
     "mri": "^1.1.4",
     "ora": "^4.0.2",
     "prismjs": "^1.17.1",
@@ -164,7 +164,7 @@
     "tapable": "^1.1.3",
     "typescript": "^3.8.3",
     "url-loader": "^2.2.0",
-    "webpack": "^4.41.2",
+    "webpack": "^4.44.2",
     "webpack-cli": "^3.3.9"
   },
   "scripts": {

src/scripts/make-webpack-config.ts

@@ -2,7 +2,7 @@ import path from 'path';
 import castArray from 'lodash/castArray';
 import webpack, { Configuration, Resolve } from 'webpack';
 import TerserPlugin from 'terser-webpack-plugin';
-import MiniHtmlWebpackPlugin from 'mini-html-webpack-plugin';
+import { MiniHtmlWebpackPlugin } from 'mini-html-webpack-plugin';
 import MiniHtmlWebpackTemplate from '@vxna/mini-html-webpack-template';
 import { CleanWebpackPlugin } from 'clean-webpack-plugin';
 import CopyWebpackPlugin from 'copy-webpack-plugin';
@@ -34,6 +34,7 @@ export default function (
 	const templateContext = isFunction(config.template) ? {} : config.template;
 	const htmlPluginOptions = {
 		context: {
+			lang: 'en',
 			...templateContext,
 			title: config.title,
 			container: config.mountPointId,

src/scripts/utils/StyleguidistOptionsPlugin.ts

@@ -1,5 +1,4 @@
-import { Tapable } from 'tapable';
-import { Compiler, compilation } from 'webpack';
+import { compilation, Compiler, WebpackPluginInstance, loader } from 'webpack';
 import * as Rsg from '../../typings';
 
 // Webpack plugin that makes Styleguidist config available for Styleguidist webpack loaders.
@@ -8,22 +7,24 @@ import * as Rsg from '../../typings';
 // Other working in webpack 2 way is to use LoaderOptionsPlugin, but it has problems.
 // See this issue for details: https://github.com/styleguidist/react-styleguidist/issues/328
 
-export default class StyleguidistOptionsPlugin implements Tapable.Plugin {
+export default class StyleguidistOptionsPlugin implements WebpackPluginInstance {
 	private options: Rsg.SanitizedStyleguidistConfig;
+
 	public constructor(options: Rsg.SanitizedStyleguidistConfig) {
 		this.options = options;
-		this.plugin = this.plugin.bind(this);
 	}
 
-	public plugin(compil: compilation.Compilation) {
-		const pluginFunc = (context: Rsg.StyleguidistLoaderContext, module: { resource?: boolean }) => {
-			if (!module.resource) {
-				return;
-			}
-			context._styleguidist = this.options;
-		};
-		compil.hooks.normalModuleLoader.tap('StyleguidistOptionsPlugin', pluginFunc);
-	}
+	private pluginFunc = (context: Rsg.StyleguidistLoaderContext, module: loader.LoaderContext) => {
+		if (!module.resource) {
+			return;
+		}
+		context._styleguidist = this.options;
+	};
+
+	private plugin = (compil: compilation.Compilation) => {
+		// FIXME: Find out how to type it properly
+		compil.hooks.normalModuleLoader.tap('StyleguidistOptionsPlugin', this.pluginFunc as any);
+	};
 
 	public apply(compiler: Compiler) {
 		compiler.hooks.compilation.tap('StyleguidistOptionsPlugin', this.plugin);

src/scripts/utils/ensureWebpack.ts

@@ -14,11 +14,11 @@ if (!webpackVersion) {
 	throw new StyleguidistError(
 		'Webpack is required for Styleguidist, please add it to your project:\n\n' +
 			'    npm install --save-dev webpack\n\n' +
-			'See how to configure it for your style guide:\n' +
+			'See how to configure webpack for your style guide:\n' +
 			consts.DOCS_WEBPACK
 	);
 } else if (webpackVersion < MIN_WEBPACK_VERSION) {
 	throw new StyleguidistError(
-		`Webpack ${webpackVersion} is not supported by Styleguidist, the minimum version is ${MIN_WEBPACK_VERSION}`
+		`Webpack ${webpackVersion} is not supported by Styleguidist, the minimum supported version is ${MIN_WEBPACK_VERSION}`
 	);
 }