New tools added + code highlighting (#12)

src/frontend/js/classes/codeStyler.js

@@ -0,0 +1,46 @@
+import hljs from "highlight.js/lib/highlight";
+import javascript from 'highlight.js/lib/languages/javascript';
+import style from 'highlight.js/styles/github-gist.css';
+
+/**
+ * @class CodeStyles
+ * @classdesc Provides styling for code blocks
+ */
+export default class CodeStyler {
+  /**
+   * @param {string} selector - CSS selector for code blocks
+   * @param {string[]} languages - list of languages to highlight, see hljs.listLanguages()
+   */
+  constructor({selector, languages = [ 'javascript' ]}) {
+    this.codeBlocksSelector = selector;
+    this.languages = languages;
+    this.langsAvailable = {
+      javascript
+    };
+
+    this.init();
+  }
+
+  /**
+   * Start to highlight
+   */
+  init() {
+    const codeBlocks = document.querySelectorAll(this.codeBlocksSelector);
+
+    if (!codeBlocks.length) {
+      return;
+    }
+
+    this.languages.forEach(lang => {
+      hljs.registerLanguage(lang, this.langsAvailable[lang]);
+    });
+
+    hljs.configure({
+      languages: this.languages
+    });
+
+    Array.from(codeBlocks).forEach(block => {
+      hljs.highlightBlock(block);
+    });
+  }
+}