feat(client, learn): add helper functions for common validation operations (#38605)

Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

client/src/utils/curriculum-helpers.js

@@ -0,0 +1,35 @@
+import { parse } from '@babel/parser';
+import generate from '@babel/generator';
+
+const removeHtmlComments = str => str.replace(/<!--(.|\s)*?-->/g, '');
+
+const removeCssComments = str => str.replace(/\/\*[\s\S]+?\*\//g, '');
+
+const removeJSComments = codeStr => {
+  // Note: removes trailing new lines and tailing spaces at end of lines
+  const options = {
+    comments: false,
+    retainLines: true,
+    compact: false,
+    concise: false,
+    minified: false
+  };
+  try {
+    const ast = parse(codeStr);
+    const { code } = generate(ast, options, codeStr);
+    return code;
+  } catch (err) {
+    return codeStr;
+  }
+};
+
+const removeWhiteSpace = (str = '') => {
+  return str.replace(/\s/g, '');
+};
+
+export default {
+  removeHtmlComments,
+  removeCssComments,
+  removeJSComments,
+  removeWhiteSpace
+};