flow like the river

BACK_BACK/node_modules/htmlnano/lib/modules/removeComments.js

@@ -0,0 +1,72 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = removeComments;
+
+var _helpers = require("../helpers");
+
+const MATCH_EXCERPT_REGEXP = /<!-- ?more ?-->/i;
+/** Removes HTML comments */
+
+function removeComments(tree, options, removeType) {
+  if (removeType !== 'all' && removeType !== 'safe') {
+    removeType = 'safe';
+  }
+
+  tree.walk(node => {
+    if (node.contents && node.contents.length) {
+      node.contents = node.contents.filter(content => !isCommentToRemove(content, removeType));
+    } else if (isCommentToRemove(node, removeType)) {
+      node = '';
+    }
+
+    return node;
+  });
+  return tree;
+}
+
+function isCommentToRemove(text, removeType) {
+  if (typeof text !== 'string') {
+    return false;
+  }
+
+  if (!(0, _helpers.isComment)(text)) {
+    // Not HTML comment
+    return false;
+  }
+
+  if (removeType === 'safe') {
+    const isNoindex = text === '<!--noindex-->' || text === '<!--/noindex-->'; // Don't remove noindex comments.
+    // See: https://yandex.com/support/webmaster/controlling-robot/html.xml
+
+    if (isNoindex) {
+      return false;
+    }
+
+    const isServerSideExclude = text === '<!--sse-->' || text === '<!--/sse-->'; // Don't remove sse comments.
+    // See: https://support.cloudflare.com/hc/en-us/articles/200170036-What-does-Server-Side-Excludes-SSE-do-
+
+    if (isServerSideExclude) {
+      return false;
+    } // https://en.wikipedia.org/wiki/Conditional_comment
+
+
+    if ((0, _helpers.isConditionalComment)(text)) {
+      return false;
+    } // Hexo: https://hexo.io/docs/tag-plugins#Post-Excerpt
+    // Hugo: https://gohugo.io/content-management/summaries/#manual-summary-splitting
+    // WordPress: https://wordpress.com/support/wordpress-editor/blocks/more-block/2/
+    // Jekyll: https://jekyllrb.com/docs/posts/#post-excerpts
+
+
+    const isCMSExcerptComment = MATCH_EXCERPT_REGEXP.test(text);
+
+    if (isCMSExcerptComment) {
+      return false;
+    }
+  }
+
+  return true;
+}