Feat: add option closeAllByClosing

README.md

@@ -95,7 +95,8 @@ Parse the data provided, wrap the result in a new node, and return the root of t
       noscript: true,		// keep text content when parsing
       style: true,		// keep text content when parsing
       pre: true			// keep text content when parsing
-    }
+    },
+    closeAllOnClosing: false  // Close all non-closed tags when containing element closes
   }
   ```
 

src/nodes/html.ts

@@ -1042,6 +1042,7 @@ export interface Options {
 		 */
 		closingSlash?: boolean;
 	};
+	closeAllByClosing?: boolean;
 }
 
 const frameflag = 'documentfragmentcontainer';
@@ -1227,6 +1228,22 @@ export function base_parse(data: string, options = {} as Partial<Options>) {
 							}
 						}
 					}
+          if (options.closeAllByClosing === true) {
+            // If tag was opened, close all nested tags
+            let i;
+            for (i = stack.length - 2; i >= 0; i--) {
+              if (stack[i].rawTagName === tagName) break;
+            }
+            if (i >= 0) {
+              while (stack.length > i) {
+								// Update range end for closed tag
+								(<[number, number]>currentParent.range)[1] = createRange(-1, Math.max(lastTextPos, tagEndPos))[1];
+								stack.pop();
+								currentParent = arr_back(stack);
+              }
+              continue;
+            }
+          }
 					// Use aggressive strategy to handle unmatching markups.
 					break;
 				}

test/tests/unclosedtags.js

@@ -0,0 +1,16 @@
+const { parse, valid } = require('@test/test-target');
+
+describe('Unclosed tags', function () {
+	it('Unclosed tags should be closed at end of parent element', function () {
+    const html = '<p>not bold<b>bold</p><p>more</p>';
+    valid(html, { closeAllByClosing: true }).should.be.true();
+    const root = parse(html, { closeAllByClosing: true });
+    root.outerHTML.should.equal('<p>not bold<b>bold</b></p><p>more</p>');
+	});
+	it('Nested unclosed tags should be closed at end of parent element', function () {
+    const html = '<p>not bold<b>bold<i>bold italic</p><p>more</p>';
+    valid(html, { closeAllByClosing: true }).should.be.true();
+    const root = parse(html, { closeAllByClosing: true });
+    root.outerHTML.should.equal('<p>not bold<b>bold<i>bold italic</i></b></p><p>more</p>');
+  });
+});