Improvements from modernize markdown

src/core/utils.js

@@ -5,8 +5,11 @@ const _MS_PER_DAY = 1000 * 60 * 60 * 24; // Milliseconds per day.
 
 $.fn.safeClone = function () {
     var $clone = this.clone();
-    // IE BUG : Placeholder text becomes actual value after deep clone on textarea
+    // IE 9-11 BUG : Placeholder text becomes actual value after deep clone on textarea
     // https://connect.microsoft.com/IE/feedback/details/781612/placeholder-text-becomes-actual-value-after-deep-clone-on-textarea
+    // Ref:
+    //     https://github.com/Patternslib/Patterns/issues/412
+    //     https://github.com/Patternslib/Patterns/pull/410
     if (window.document.documentMode) {
         $clone.findInclusive(":input[placeholder]").each(function (i, item) {
             var $item = $(item);
@@ -589,7 +592,9 @@ const localized_isodate = (date) => {
  * Replace HTML reserved characters with html entities to add HTML for user
  * editing to e.g. a textarea or a contenteditable.
  *
- * See: https://developer.mozilla.org/en-US/docs/Glossary/Entity#reserved_characters
+ * See:
+ *  https://stackoverflow.com/a/22706073/1337474
+ *  https://developer.mozilla.org/en-US/docs/Glossary/Entity#reserved_characters
  *
  * @param {string} html - The HTML string to encode.
  *
@@ -600,17 +605,21 @@ const localized_isodate = (date) => {
  *                     ``"`` will be replaced with ``"``.
  */
 const escape_html = (html) => {
-    return (html || "")
-        .replace(/&/g, "&") // needs to be first!
-        .replace(/</g, "&lt;")
-        .replace(/>/g, "&gt;")
-        .replace(/"/g, "&quot;");
+    if (!html) {
+        return "";
+    }
+    const el = document.createElement("div");
+    el.appendChild(document.createTextNode(html));
+    // Return escaped html and also replace quotes.
+    return el.innerHTML.replace(/"/g, "&quot;");
 };
 
 /**
  * Return unescaped, raw HTML from an escaped HTML  string.
  *
- * See: https://developer.mozilla.org/en-US/docs/Glossary/Entity#reserved_characters
+ * See:
+ *  https://stackoverflow.com/a/34064434/1337474
+ *  https://developer.mozilla.org/en-US/docs/Glossary/Entity#reserved_characters
  *
  * @param {string} escaped_html - The HTML string to decode.
  *
@@ -621,11 +630,12 @@ const escape_html = (html) => {
  *                     ``&quot;`` will be replaced with ``"``.
  */
 const unescape_html = (escaped_html) => {
-    return (escaped_html || "")
-        .replace(/&amp;/g, "&")
-        .replace(/&lt;/g, "<")
-        .replace(/&gt;/g, ">")
-        .replace(/&quot;/g, '"');
+    if (!escaped_html) {
+        return "";
+    }
+    const doc = new DOMParser().parseFromString(escaped_html, "text/html");
+    // Return unescaped html and also unescape quote named entities.
+    return doc.documentElement.textContent.replace(/&quot;/g, '"');
 };
 
 /**

src/patterns.js

@@ -5,7 +5,6 @@
 // Import base
 import "./globals";
 import registry from "./core/registry";
-import "modernizr";
 
 // Import all used patterns for the bundle to be generated
 import "./core/push_kit";
@@ -74,4 +73,12 @@ import "@patternslib/pat-upload";
 // Set to ``true`` to include core styles via JavaScript
 //window.__patternslib_import_styles = false;
 
+// Include modernizr per default.
+// Most of our styles depend on it.
+// You might want to disable it for your project by setting:
+// window.__patternslib_disable_modernizr = true;
+if (!window.__patternslib_disable_modernizr) {
+    import("modernizr");
+}
+
 registry.init();