From 2ae0b893ef19336862d3a985444b0a559e6857f6 Mon Sep 17 00:00:00 2001
From: Billy Vong <billyvg@users.noreply.github.com>
Date: Wed, 4 Dec 2024 16:12:46 -0500
Subject: [PATCH] add fix for !important

---
 packages/rrweb-snapshot/src/utils.ts          |   7 +-
 .../test/__snapshots__/record.test.ts.snap    | 103 ++++++++++++++++++
 packages/rrweb/test/record.test.ts            |  30 ++++-
 3 files changed, 137 insertions(+), 3 deletions(-)

diff --git a/packages/rrweb-snapshot/src/utils.ts b/packages/rrweb-snapshot/src/utils.ts
index bd2b610861..7c026a8ce8 100644
--- a/packages/rrweb-snapshot/src/utils.ts
+++ b/packages/rrweb-snapshot/src/utils.ts
@@ -113,7 +113,12 @@ export function stringifyStylesheet(s: CSSStyleSheet): string | null {
 export function fixAllCssProperty(rule: CSSStyleRule) {
   let styles = '';
   for (let i = 0; i < rule.style.length; i++) {
-    styles += `${rule.style[i]}:${rule.style.getPropertyValue(rule.style[i])};`;
+    const styleDeclaration = rule.style;
+    const attribute = styleDeclaration[i];
+    const isImportant = styleDeclaration.getPropertyPriority(attribute);
+    styles += `${attribute}:${styleDeclaration.getPropertyValue(attribute)}${
+      isImportant ? ` !important` : ''
+    };`;
   }
 
   return `${rule.selectorText} { ${styles} }`;
diff --git a/packages/rrweb/test/__snapshots__/record.test.ts.snap b/packages/rrweb/test/__snapshots__/record.test.ts.snap
index e4f5e0b2e4..00aae9cb0f 100644
--- a/packages/rrweb/test/__snapshots__/record.test.ts.snap
+++ b/packages/rrweb/test/__snapshots__/record.test.ts.snap
@@ -2428,6 +2428,109 @@ exports[`record captures stylesheets with \`blob:\` url 1`] = `
 ]"
 `;
 
+exports[`record handles \`!important\` with "all" CSS property 1`] = `
+"[
+  {
+    \\"type\\": 4,
+    \\"data\\": {
+      \\"href\\": \\"about:blank\\",
+      \\"width\\": 1920,
+      \\"height\\": 1080
+    }
+  },
+  {
+    \\"type\\": 2,
+    \\"data\\": {
+      \\"node\\": {
+        \\"type\\": 0,
+        \\"childNodes\\": [
+          {
+            \\"type\\": 1,
+            \\"name\\": \\"html\\",
+            \\"publicId\\": \\"\\",
+            \\"systemId\\": \\"\\",
+            \\"id\\": 2
+          },
+          {
+            \\"type\\": 2,
+            \\"tagName\\": \\"html\\",
+            \\"attributes\\": {},
+            \\"childNodes\\": [
+              {
+                \\"type\\": 2,
+                \\"tagName\\": \\"head\\",
+                \\"attributes\\": {},
+                \\"childNodes\\": [
+                  {
+                    \\"type\\": 2,
+                    \\"tagName\\": \\"style\\",
+                    \\"attributes\\": {
+                      \\"_cssText\\": \\".btn { all:unset !important;padding-top:10px !important;padding-right:15px !important;padding-bottom:10px !important;padding-left:15px !important; }\\"
+                    },
+                    \\"childNodes\\": [],
+                    \\"id\\": 5
+                  }
+                ],
+                \\"id\\": 4
+              },
+              {
+                \\"type\\": 2,
+                \\"tagName\\": \\"body\\",
+                \\"attributes\\": {},
+                \\"childNodes\\": [
+                  {
+                    \\"type\\": 3,
+                    \\"textContent\\": \\"\\\\n          \\",
+                    \\"id\\": 7
+                  },
+                  {
+                    \\"type\\": 2,
+                    \\"tagName\\": \\"input\\",
+                    \\"attributes\\": {
+                      \\"type\\": \\"text\\",
+                      \\"size\\": \\"40\\"
+                    },
+                    \\"childNodes\\": [],
+                    \\"id\\": 8
+                  },
+                  {
+                    \\"type\\": 3,
+                    \\"textContent\\": \\"\\\\n        \\\\n      \\\\n    \\",
+                    \\"id\\": 9
+                  },
+                  {
+                    \\"type\\": 2,
+                    \\"tagName\\": \\"div\\",
+                    \\"attributes\\": {
+                      \\"style\\": \\"all: unset !important; padding: 8px 4px !important;\\"
+                    },
+                    \\"childNodes\\": [
+                      {
+                        \\"type\\": 3,
+                        \\"textContent\\": \\"Button\\",
+                        \\"id\\": 11
+                      }
+                    ],
+                    \\"id\\": 10
+                  }
+                ],
+                \\"id\\": 6
+              }
+            ],
+            \\"id\\": 3
+          }
+        ],
+        \\"id\\": 1
+      },
+      \\"initialOffset\\": {
+        \\"left\\": 0,
+        \\"top\\": 0
+      }
+    }
+  }
+]"
+`;
+
 exports[`record iframes captures stylesheet mutations in iframes 1`] = `
 "[
   {
diff --git a/packages/rrweb/test/record.test.ts b/packages/rrweb/test/record.test.ts
index 7f75b3e4e6..11c986ba1d 100644
--- a/packages/rrweb/test/record.test.ts
+++ b/packages/rrweb/test/record.test.ts
@@ -749,7 +749,6 @@ describe('record', function (this: ISuite) {
       document.head.appendChild(styleElement);
 
       const styleSheet = <CSSStyleSheet>styleElement.sheet;
-      // begin: pre-serialization
       styleSheet.insertRule('.btn { all: unset; padding: 10px 15px; }');
 
       record({
@@ -772,7 +771,6 @@ describe('record', function (this: ISuite) {
       document.head.appendChild(style2);
 
       const styleSheet = <CSSStyleSheet>style2.sheet;
-      // begin: pre-serialization
       styleSheet.insertRule('.btn2 { all: unset; padding: 4px 8px; }');
     });
     ctx.page.on('console', (msg) => console.log('PAGE LOG:', msg.text()));
@@ -809,6 +807,34 @@ describe('record', function (this: ISuite) {
     });
   });
 
+  it('handles `!important` with "all" CSS property', async () => {
+    await ctx.page.evaluate(() => {
+      const { record } = (window as unknown as IWindow).rrweb;
+
+      const div = document.createElement('div');
+      div.setAttribute(
+        'style',
+        'all: unset !important; padding: 8px 4px !important;',
+      );
+      div.innerText = 'Button';
+      document.body.appendChild(div);
+
+      const styleElement = document.createElement('style');
+      document.head.appendChild(styleElement);
+
+      const styleSheet = <CSSStyleSheet>styleElement.sheet;
+      styleSheet.insertRule(
+        '.btn { all: unset !important; padding: 10px 15px !important; }',
+      );
+
+      record({
+        emit: (window as unknown as IWindow).emit,
+      });
+    });
+    await ctx.page.waitForTimeout(50);
+    assertSnapshot(ctx.events);
+  });
+
   describe('loading stylesheets', () => {
     let server: Server;
     let serverURL: string;