diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 86aa839..dac4e3e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -113,6 +113,10 @@ jobs:
             name: iOS Simulator Safari 14
             targetBrowser: Safari_IOS_14
             xcode: /Applications/Xcode_12.4.app
+          - os: macos-11
+            name: iOS Simulator Safari 15.0
+            targetBrowser: Safari_IOS_15_0
+            xcode: /Applications/Xcode_13.0.app
           - os: macos-11
             name: iOS Simulator Safari 15
             targetBrowser: Safari_IOS_15
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5d83c47..8624102 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,52 @@
 
 All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
 
+## [1.4.1](https://github.com/niklasvh/html2canvas/compare/v1.4.0...v1.4.1) (2022-01-22)
+
+
+### deps
+
+* fix source maps (#2812) ([67c5e8d](https://github.com/niklasvh/html2canvas/commit/67c5e8dec4b2af9260a2b5b75b3399495fd1fee9)), closes [#2812](https://github.com/niklasvh/html2canvas/issues/2812)
+
+### feat
+
+* add support for `<video>` elements (#2788) ([181d1b1](https://github.com/niklasvh/html2canvas/commit/181d1b1103910d6e1b5277d5c007fc5e3006c6bf)), closes [#2788](https://github.com/niklasvh/html2canvas/issues/2788)
+
+### fix
+
+* Properties x and y of BoundingRect is undefined in old browser (#2797) ([e587a82](https://github.com/niklasvh/html2canvas/commit/e587a82dca01d9ada78cae34fd1bdb934e547f9b)), closes [#2797](https://github.com/niklasvh/html2canvas/issues/2797)
+* source maps (#2787) ([46db867](https://github.com/niklasvh/html2canvas/commit/46db86755f064828559a4b0b37310f3ae94f5494)), closes [#2787](https://github.com/niklasvh/html2canvas/issues/2787)
+
+
+
+# [1.4.0](https://github.com/niklasvh/html2canvas/compare/v1.3.4...v1.4.0) (2022-01-01)
+
+
+### feat
+
+* use native text segmenter where available (#2782) ([6521a48](https://github.com/niklasvh/html2canvas/commit/6521a487d78172f7179f7c973c1a3af40eb92009)), closes [#2782](https://github.com/niklasvh/html2canvas/issues/2782)
+
+### fix
+
+* adopted stylesheets (#2785) ([74696fa](https://github.com/niklasvh/html2canvas/commit/74696faf47c07b48b9c9587db0b999da1c08a8be)), closes [#2785](https://github.com/niklasvh/html2canvas/issues/2785)
+* ios text wrapping with 0 width rect (#2786) ([0476d06](https://github.com/niklasvh/html2canvas/commit/0476d065158c33d2020a9f602b3043e5e2f90c75)), closes [#2786](https://github.com/niklasvh/html2canvas/issues/2786)
+* reduce SLICE_STACK_SIZE to 50k (#2784) ([1cc853a](https://github.com/niklasvh/html2canvas/commit/1cc853a3186853eaca00af060f651697dc3497a9)), closes [#2784](https://github.com/niklasvh/html2canvas/issues/2784)
+
+
+
+## [1.3.4](https://github.com/niklasvh/html2canvas/compare/v1.3.3...v1.3.4) (2021-12-29)
+
+
+### ci
+
+* add ios 15.0 testing (#2780) ([d922207](https://github.com/niklasvh/html2canvas/commit/d9222075daaed08884491b0563fc899ee0ced731)), closes [#2780](https://github.com/niklasvh/html2canvas/issues/2780)
+
+### fix
+
+* ios 15 font rendering crash (#2645) ([ba2b1cd](https://github.com/niklasvh/html2canvas/commit/ba2b1cd8e9a9d7932675d7abffce1526a609e769)), closes [#2645](https://github.com/niklasvh/html2canvas/issues/2645)
+
+
+
 ## [1.3.3](https://github.com/niklasvh/html2canvas/compare/v1.3.2...v1.3.3) (2021-11-23)
 
 
diff --git a/examples/existing_canvas.html b/examples/existing_canvas.html
index baa743e..6c9b449 100644
--- a/examples/existing_canvas.html
+++ b/examples/existing_canvas.html
@@ -29,8 +29,6 @@
     var canvas = document.querySelector("canvas");
     var ctx = canvas.getContext("2d");
 
-    var ctx = canvas.getContext('2d');
-
     ctx.beginPath();
     ctx.arc(75,75,50,0,Math.PI*2,true); // Outer circle
     ctx.moveTo(110,75);
diff --git a/karma.conf.js b/karma.conf.js
index f1fd674..526deac 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -42,9 +42,15 @@ module.exports = function(config) {
             platform: 'iOS',
             sdk: '14.4'
         },
+        Safari_IOS_15_0: {
+            base: 'MobileSafari',
+            name: 'iPhone 13',
+            platform: 'iOS',
+            sdk: '15.0'
+        },
         Safari_IOS_15: {
             base: 'MobileSafari',
-            name: 'iPhone 8',
+            name: 'iPhone 13',
             platform: 'iOS',
             sdk: '15.2'
         },
diff --git a/package-lock.json b/package-lock.json
index 8448519..f972f71 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,15 @@
 {
   "name": "html2canvas",
-  "version": "1.3.3",
+  "version": "1.4.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "version": "1.2.2",
+      "version": "1.4.0",
       "license": "MIT",
       "dependencies": {
-        "css-line-break": "2.0.1",
-        "text-segmentation": "^1.0.2"
+        "css-line-break": "^2.1.0",
+        "text-segmentation": "^1.0.3"
       },
       "devDependencies": {
         "@babel/cli": "^7.4.3",
@@ -5705,6 +5705,7 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-1.0.1.tgz",
       "integrity": "sha512-vFIUq7FdLtjZMhATwDul5RZWv2jpXQ09Pd6jcVEOvIsqCWTRFD/ONHNfyOS8dA/Ippi5dsIgpyKWKZaAKZltbA==",
+      "dev": true,
       "engines": {
         "node": ">= 0.6.0"
       }
@@ -8465,19 +8466,11 @@
       }
     },
     "node_modules/css-line-break": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/css-line-break/-/css-line-break-2.0.1.tgz",
-      "integrity": "sha512-gwKYIMUn7xodIcb346wgUhE2Dt5O1Kmrc16PWi8sL4FTfyDj8P5095rzH7+O8CTZudJr+uw2GCI/hwEkDJFI2w==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/css-line-break/-/css-line-break-2.1.0.tgz",
+      "integrity": "sha512-FHcKFCZcAha3LwfVBhCQbW2nCNbkZXn7KVUJcsT5/P8YmfsVja0FMPJr0B903j/E69HUphKiV9iQArX8SDYA4w==",
       "dependencies": {
-        "base64-arraybuffer": "^0.2.0"
-      }
-    },
-    "node_modules/css-line-break/node_modules/base64-arraybuffer": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.2.0.tgz",
-      "integrity": "sha512-7emyCsu1/xiBXgQZrscw/8KPRT44I4Yq9Pe6EGs3aPRTsWuggML1/1DTuZUuIaJPIm1FTDUVXl4x/yW8s0kQDQ==",
-      "engines": {
-        "node": ">= 0.6.0"
+        "utrie": "^1.0.2"
       }
     },
     "node_modules/cssom": {
@@ -22757,11 +22750,11 @@
       }
     },
     "node_modules/text-segmentation": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/text-segmentation/-/text-segmentation-1.0.2.tgz",
-      "integrity": "sha512-uTqvLxdBrVnx/CFQOtnf8tfzSXFm+1Qxau7Xi54j4OPTZokuDOX8qncQzrg2G8ZicAMOM8TgzFAYTb+AqNO4Cw==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/text-segmentation/-/text-segmentation-1.0.3.tgz",
+      "integrity": "sha512-iOiPUo/BGnZ6+54OsWxZidGCsdU8YbE4PSpdPinp7DeMtUJNJBoJ/ouUSTJjHkh1KntHaltHl/gDs2FC4i5+Nw==",
       "dependencies": {
-        "utrie": "^1.0.1"
+        "utrie": "^1.0.2"
       }
     },
     "node_modules/text-table": {
@@ -23805,11 +23798,19 @@
       }
     },
     "node_modules/utrie": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/utrie/-/utrie-1.0.1.tgz",
-      "integrity": "sha512-JPaDXF3vzgZxfeEwutdGzlrNoVFL5UvZcbO6Qo9D4GoahrieUPoMU8GCpVpR7MQqcKhmShIh8VlbEN3PLM3EBg==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/utrie/-/utrie-1.0.2.tgz",
+      "integrity": "sha512-1MLa5ouZiOmQzUbjbu9VmjLzn1QLXBhwpUa7kdLUQK+KQ5KA9I1vk5U4YHe/X2Ch7PYnJfWuWT+VbuxbGwljhw==",
       "dependencies": {
-        "base64-arraybuffer": "^1.0.1"
+        "base64-arraybuffer": "^1.0.2"
+      }
+    },
+    "node_modules/utrie/node_modules/base64-arraybuffer": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-1.0.2.tgz",
+      "integrity": "sha512-I3yl4r9QB5ZRY3XuJVEPfc2XhZO6YweFPI+UovAzn+8/hb3oJ6lnysaFcjVpkCPfVWFUDvoZ8kmVDP7WyRtYtQ==",
+      "engines": {
+        "node": ">= 0.6.0"
       }
     },
     "node_modules/uuid": {
@@ -29686,7 +29687,8 @@
     "base64-arraybuffer": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-1.0.1.tgz",
-      "integrity": "sha512-vFIUq7FdLtjZMhATwDul5RZWv2jpXQ09Pd6jcVEOvIsqCWTRFD/ONHNfyOS8dA/Ippi5dsIgpyKWKZaAKZltbA=="
+      "integrity": "sha512-vFIUq7FdLtjZMhATwDul5RZWv2jpXQ09Pd6jcVEOvIsqCWTRFD/ONHNfyOS8dA/Ippi5dsIgpyKWKZaAKZltbA==",
+      "dev": true
     },
     "base64-js": {
       "version": "1.5.1",
@@ -31950,18 +31952,11 @@
       }
     },
     "css-line-break": {
-      "version": "2.0.1",
-      "resolved": "https://registry.npmjs.org/css-line-break/-/css-line-break-2.0.1.tgz",
-      "integrity": "sha512-gwKYIMUn7xodIcb346wgUhE2Dt5O1Kmrc16PWi8sL4FTfyDj8P5095rzH7+O8CTZudJr+uw2GCI/hwEkDJFI2w==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/css-line-break/-/css-line-break-2.1.0.tgz",
+      "integrity": "sha512-FHcKFCZcAha3LwfVBhCQbW2nCNbkZXn7KVUJcsT5/P8YmfsVja0FMPJr0B903j/E69HUphKiV9iQArX8SDYA4w==",
       "requires": {
-        "base64-arraybuffer": "^0.2.0"
-      },
-      "dependencies": {
-        "base64-arraybuffer": {
-          "version": "0.2.0",
-          "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-0.2.0.tgz",
-          "integrity": "sha512-7emyCsu1/xiBXgQZrscw/8KPRT44I4Yq9Pe6EGs3aPRTsWuggML1/1DTuZUuIaJPIm1FTDUVXl4x/yW8s0kQDQ=="
-        }
+        "utrie": "^1.0.2"
       }
     },
     "cssom": {
@@ -43210,11 +43205,11 @@
       "dev": true
     },
     "text-segmentation": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/text-segmentation/-/text-segmentation-1.0.2.tgz",
-      "integrity": "sha512-uTqvLxdBrVnx/CFQOtnf8tfzSXFm+1Qxau7Xi54j4OPTZokuDOX8qncQzrg2G8ZicAMOM8TgzFAYTb+AqNO4Cw==",
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/text-segmentation/-/text-segmentation-1.0.3.tgz",
+      "integrity": "sha512-iOiPUo/BGnZ6+54OsWxZidGCsdU8YbE4PSpdPinp7DeMtUJNJBoJ/ouUSTJjHkh1KntHaltHl/gDs2FC4i5+Nw==",
       "requires": {
-        "utrie": "^1.0.1"
+        "utrie": "^1.0.2"
       }
     },
     "text-table": {
@@ -44011,11 +44006,18 @@
       "dev": true
     },
     "utrie": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/utrie/-/utrie-1.0.1.tgz",
-      "integrity": "sha512-JPaDXF3vzgZxfeEwutdGzlrNoVFL5UvZcbO6Qo9D4GoahrieUPoMU8GCpVpR7MQqcKhmShIh8VlbEN3PLM3EBg==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/utrie/-/utrie-1.0.2.tgz",
+      "integrity": "sha512-1MLa5ouZiOmQzUbjbu9VmjLzn1QLXBhwpUa7kdLUQK+KQ5KA9I1vk5U4YHe/X2Ch7PYnJfWuWT+VbuxbGwljhw==",
       "requires": {
-        "base64-arraybuffer": "^1.0.1"
+        "base64-arraybuffer": "^1.0.2"
+      },
+      "dependencies": {
+        "base64-arraybuffer": {
+          "version": "1.0.2",
+          "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-1.0.2.tgz",
+          "integrity": "sha512-I3yl4r9QB5ZRY3XuJVEPfc2XhZO6YweFPI+UovAzn+8/hb3oJ6lnysaFcjVpkCPfVWFUDvoZ8kmVDP7WyRtYtQ=="
+        }
       }
     },
     "uuid": {
diff --git a/package.json b/package.json
index d540cca..cefd436 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "module": "dist/html2canvas.esm.js",
   "typings": "dist/types/index.d.ts",
   "browser": "dist/html2canvas.js",
-  "version": "1.3.3",
+  "version": "1.4.1",
   "author": {
     "name": "Niklas von Hertzen",
     "email": "niklasvh@gmail.com",
@@ -118,7 +118,7 @@
   "homepage": "https://html2canvas.hertzen.com",
   "license": "MIT",
   "dependencies": {
-    "css-line-break": "2.0.1",
-    "text-segmentation": "^1.0.2"
+    "css-line-break": "^2.1.0",
+    "text-segmentation": "^1.0.3"
   }
 }
diff --git a/rollup.config.ts b/rollup.config.ts
index 1f85df4..13bf9a6 100644
--- a/rollup.config.ts
+++ b/rollup.config.ts
@@ -30,7 +30,7 @@ export default {
         // Allow json resolution
         json(),
         // Compile TypeScript files
-        typescript(),
+        typescript({ sourceMap: true, inlineSources: true }),
         // Allow bundling cjs modules (unlike webpack, rollup doesn't understand cjs)
         commonjs({
             include: 'node_modules/**'
diff --git a/src/core/features.ts b/src/core/features.ts
index 78514bd..64e8aea 100644
--- a/src/core/features.ts
+++ b/src/core/features.ts
@@ -211,5 +211,12 @@ export const FEATURES = {
         const value = 'withCredentials' in new XMLHttpRequest();
         Object.defineProperty(FEATURES, 'SUPPORT_CORS_XHR', {value});
         return value;
+    },
+    get SUPPORT_NATIVE_TEXT_SEGMENTATION(): boolean {
+        'use strict';
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const value = !!(typeof Intl !== 'undefined' && (Intl as any).Segmenter);
+        Object.defineProperty(FEATURES, 'SUPPORT_NATIVE_TEXT_SEGMENTATION', {value});
+        return value;
     }
 };
diff --git a/src/css/layout/bounds.ts b/src/css/layout/bounds.ts
index 43d1bea..4e26512 100644
--- a/src/css/layout/bounds.ts
+++ b/src/css/layout/bounds.ts
@@ -17,11 +17,11 @@ export class Bounds {
     }
 
     static fromDOMRectList(context: Context, domRectList: DOMRectList): Bounds {
-        const domRect = domRectList[0];
+        const domRect = Array.from(domRectList).find((rect) => rect.width !== 0);
         return domRect
             ? new Bounds(
-                  domRect.x + context.windowBounds.left,
-                  domRect.y + context.windowBounds.top,
+                  domRect.left + context.windowBounds.left,
+                  domRect.top + context.windowBounds.top,
                   domRect.width,
                   domRect.height
               )
diff --git a/src/css/layout/text.ts b/src/css/layout/text.ts
index 59f0bde..0c68019 100644
--- a/src/css/layout/text.ts
+++ b/src/css/layout/text.ts
@@ -28,15 +28,24 @@ export const parseTextBounds = (
     textList.forEach((text) => {
         if (styles.textDecorationLine.length || text.trim().length > 0) {
             if (FEATURES.SUPPORT_RANGE_BOUNDS) {
-                if (!FEATURES.SUPPORT_WORD_BREAKING) {
-                    textBounds.push(
-                        new TextBounds(
-                            text,
-                            Bounds.fromDOMRectList(context, createRange(node, offset, text.length).getClientRects())
-                        )
-                    );
+                const clientRects = createRange(node, offset, text.length).getClientRects();
+                if (clientRects.length > 1) {
+                    const subSegments = segmentGraphemes(text);
+                    let subOffset = 0;
+                    subSegments.forEach((subSegment) => {
+                        textBounds.push(
+                            new TextBounds(
+                                subSegment,
+                                Bounds.fromDOMRectList(
+                                    context,
+                                    createRange(node, subOffset + offset, subSegment.length).getClientRects()
+                                )
+                            )
+                        );
+                        subOffset += subSegment.length;
+                    });
                 } else {
-                    textBounds.push(new TextBounds(text, getRangeBounds(context, node, offset, text.length)));
+                    textBounds.push(new TextBounds(text, Bounds.fromDOMRectList(context, clientRects)));
                 }
             } else {
                 const replacementNode = node.splitText(text.length);
@@ -82,12 +91,32 @@ const createRange = (node: Text, offset: number, length: number): Range => {
     return range;
 };
 
-const getRangeBounds = (context: Context, node: Text, offset: number, length: number): Bounds => {
-    return Bounds.fromClientRect(context, createRange(node, offset, length).getBoundingClientRect());
+export const segmentGraphemes = (value: string): string[] => {
+    if (FEATURES.SUPPORT_NATIVE_TEXT_SEGMENTATION) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const segmenter = new (Intl as any).Segmenter(void 0, {granularity: 'grapheme'});
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        return Array.from(segmenter.segment(value)).map((segment: any) => segment.segment);
+    }
+
+    return splitGraphemes(value);
+};
+
+const segmentWords = (value: string, styles: CSSParsedDeclaration): string[] => {
+    if (FEATURES.SUPPORT_NATIVE_TEXT_SEGMENTATION) {
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        const segmenter = new (Intl as any).Segmenter(void 0, {
+            granularity: 'word'
+        });
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        return Array.from(segmenter.segment(value)).map((segment: any) => segment.segment);
+    }
+
+    return breakWords(value, styles);
 };
 
 const breakText = (value: string, styles: CSSParsedDeclaration): string[] => {
-    return styles.letterSpacing !== 0 ? splitGraphemes(value) : breakWords(value, styles);
+    return styles.letterSpacing !== 0 ? segmentGraphemes(value) : segmentWords(value, styles);
 };
 
 // https://drafts.csswg.org/css-text/#word-separator
diff --git a/src/css/syntax/tokenizer.ts b/src/css/syntax/tokenizer.ts
index e050847..11bbb03 100644
--- a/src/css/syntax/tokenizer.ts
+++ b/src/css/syntax/tokenizer.ts
@@ -657,7 +657,7 @@ export class Tokenizer {
     }
 
     private consumeStringSlice(count: number): string {
-        const SLICE_STACK_SIZE = 60000;
+        const SLICE_STACK_SIZE = 50000;
         let value = '';
         while (count > 0) {
             const amount = Math.min(SLICE_STACK_SIZE, count);
diff --git a/src/dom/document-cloner.ts b/src/dom/document-cloner.ts
index 796e557..08faa29 100644
--- a/src/dom/document-cloner.ts
+++ b/src/dom/document-cloner.ts
@@ -2,16 +2,19 @@ import {Bounds} from '../css/layout/bounds';
 import {
     isBodyElement,
     isCanvasElement,
+    isCustomElement,
     isElementNode,
     isHTMLElementNode,
     isIFrameElement,
     isImageElement,
     isScriptElement,
     isSelectElement,
+    isSlotElement,
     isStyleElement,
     isSVGElementNode,
     isTextareaElement,
-    isTextNode
+    isTextNode,
+    isVideoElement
 } from './node-parser';
 import {isIdentToken, nonFunctionArgSeparator} from '../css/syntax/parser';
 import {TokenType} from '../css/syntax/tokenizer';
@@ -63,7 +66,7 @@ export class DocumentCloner {
             throw new Error('Cloned element does not have an owner document');
         }
 
-        this.documentElement = this.cloneNode(element.ownerDocument.documentElement) as HTMLElement;
+        this.documentElement = this.cloneNode(element.ownerDocument.documentElement, false) as HTMLElement;
     }
 
     toIFrame(ownerDocument: Document, windowSize: Bounds): Promise<HTMLIFrameElement> {
@@ -143,7 +146,9 @@ export class DocumentCloner {
         if (isCanvasElement(node)) {
             return this.createCanvasClone(node);
         }
-
+        if (isVideoElement(node)) {
+            return this.createVideoClone(node);
+        }
         if (isStyleElement(node)) {
             return this.createStyleClone(node);
         }
@@ -160,6 +165,17 @@ export class DocumentCloner {
             }
         }
 
+        if (isCustomElement(clone)) {
+            return this.createCustomElementClone(clone);
+        }
+
+        return clone;
+    }
+
+    createCustomElementClone(node: HTMLElement): HTMLElement {
+        const clone = document.createElement('html2canvascustomelement');
+        copyCSSStyles(node.style, clone);
+
         return clone;
     }
 
@@ -231,7 +247,63 @@ export class DocumentCloner {
         return clonedCanvas;
     }
 
-    cloneNode(node: Node): Node {
+    createVideoClone(video: HTMLVideoElement): HTMLCanvasElement {
+        const canvas = video.ownerDocument.createElement('canvas');
+
+        canvas.width = video.offsetWidth;
+        canvas.height = video.offsetHeight;
+        const ctx = canvas.getContext('2d');
+
+        try {
+            if (ctx) {
+                ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
+                if (!this.options.allowTaint) {
+                    ctx.getImageData(0, 0, canvas.width, canvas.height);
+                }
+            }
+            return canvas;
+        } catch (e) {
+            this.context.logger.info(`Unable to clone video as it is tainted`, video);
+        }
+
+        const blankCanvas = video.ownerDocument.createElement('canvas');
+
+        blankCanvas.width = video.offsetWidth;
+        blankCanvas.height = video.offsetHeight;
+        return blankCanvas;
+    }
+
+    appendChildNode(clone: HTMLElement | SVGElement, child: Node, copyStyles: boolean): void {
+        if (
+            !isElementNode(child) ||
+            (!isScriptElement(child) &&
+                !child.hasAttribute(IGNORE_ATTRIBUTE) &&
+                (typeof this.options.ignoreElements !== 'function' || !this.options.ignoreElements(child)))
+        ) {
+            if (!this.options.copyStyles || !isElementNode(child) || !isStyleElement(child)) {
+                clone.appendChild(this.cloneNode(child, copyStyles));
+            }
+        }
+    }
+
+    cloneChildNodes(node: Element, clone: HTMLElement | SVGElement, copyStyles: boolean): void {
+        for (
+            let child = node.shadowRoot ? node.shadowRoot.firstChild : node.firstChild;
+            child;
+            child = child.nextSibling
+        ) {
+            if (isElementNode(child) && isSlotElement(child) && typeof child.assignedNodes === 'function') {
+                const assignedNodes = child.assignedNodes() as ChildNode[];
+                if (assignedNodes.length) {
+                    assignedNodes.forEach((assignedNode) => this.appendChildNode(clone, assignedNode, copyStyles));
+                }
+            } else {
+                this.appendChildNode(clone, child, copyStyles);
+            }
+        }
+    }
+
+    cloneNode(node: Node, copyStyles: boolean): Node {
         if (isTextNode(node)) {
             return document.createTextNode(node.data);
         }
@@ -260,17 +332,12 @@ export class DocumentCloner {
             const counters = this.counters.parse(new CSSParsedCounterDeclaration(this.context, style));
             const before = this.resolvePseudoContent(node, clone, styleBefore, PseudoElementType.BEFORE);
 
-            for (let child = node.firstChild; child; child = child.nextSibling) {
-                if (
-                    !isElementNode(child) ||
-                    (!isScriptElement(child) &&
-                        !child.hasAttribute(IGNORE_ATTRIBUTE) &&
-                        (typeof this.options.ignoreElements !== 'function' || !this.options.ignoreElements(child)))
-                ) {
-                    if (!this.options.copyStyles || !isElementNode(child) || !isStyleElement(child)) {
-                        clone.appendChild(this.cloneNode(child));
-                    }
-                }
+            if (isCustomElement(node)) {
+                copyStyles = true;
+            }
+
+            if (!isVideoElement(node)) {
+                this.cloneChildNodes(node, clone, copyStyles);
             }
 
             if (before) {
@@ -284,7 +351,10 @@ export class DocumentCloner {
 
             this.counters.pop(counters);
 
-            if (style && (this.options.copyStyles || isSVGElementNode(node)) && !isIFrameElement(node)) {
+            if (
+                (style && (this.options.copyStyles || isSVGElementNode(node)) && !isIFrameElement(node)) ||
+                copyStyles
+            ) {
                 copyCSSStyles(style, clone);
             }
 
diff --git a/src/dom/node-parser.ts b/src/dom/node-parser.ts
index 260974e..5f38a24 100644
--- a/src/dom/node-parser.ts
+++ b/src/dom/node-parser.ts
@@ -124,6 +124,7 @@ export const isHTMLElement = (node: Element): node is HTMLHtmlElement => node.ta
 export const isSVGElement = (node: Element): node is SVGSVGElement => node.tagName === 'svg';
 export const isBodyElement = (node: Element): node is HTMLBodyElement => node.tagName === 'BODY';
 export const isCanvasElement = (node: Element): node is HTMLCanvasElement => node.tagName === 'CANVAS';
+export const isVideoElement = (node: Element): node is HTMLVideoElement => node.tagName === 'VIDEO';
 export const isImageElement = (node: Element): node is HTMLImageElement => node.tagName === 'IMG';
 export const isIFrameElement = (node: Element): node is HTMLIFrameElement => node.tagName === 'IFRAME';
 export const isStyleElement = (node: Element): node is HTMLStyleElement => node.tagName === 'STYLE';
@@ -131,3 +132,5 @@ export const isScriptElement = (node: Element): node is HTMLScriptElement => nod
 export const isTextareaElement = (node: Element): node is HTMLTextAreaElement => node.tagName === 'TEXTAREA';
 export const isSelectElement = (node: Element): node is HTMLSelectElement => node.tagName === 'SELECT';
 export const isSlotElement = (node: Element): node is HTMLSlotElement => node.tagName === 'SLOT';
+// https://html.spec.whatwg.org/multipage/custom-elements.html#valid-custom-element-name
+export const isCustomElement = (node: Element): node is HTMLElement => node.tagName.indexOf('-') > 0;
diff --git a/src/render/canvas/canvas-renderer.ts b/src/render/canvas/canvas-renderer.ts
index 48e7315..6efb648 100644
--- a/src/render/canvas/canvas-renderer.ts
+++ b/src/render/canvas/canvas-renderer.ts
@@ -2,7 +2,7 @@ import {ElementPaint, parseStackingContexts, StackingContext} from '../stacking-
 import {asString, Color, isTransparent} from '../../css/types/color';
 import {ElementContainer, FLAGS} from '../../dom/element-container';
 import {BORDER_STYLE} from '../../css/property-descriptors/border-style';
-import {CSSParsedDeclaration} from '../../css/index';
+import {CSSParsedDeclaration} from '../../css';
 import {TextContainer} from '../../dom/text-container';
 import {Path, transformPath} from '../path';
 import {BACKGROUND_CLIP} from '../../css/property-descriptors/background-clip';
@@ -18,12 +18,12 @@ import {
 } from '../border';
 import {calculateBackgroundRendering, getBackgroundValueForIndex} from '../background';
 import {isDimensionToken} from '../../css/syntax/parser';
-import {TextBounds} from '../../css/layout/text';
+import {segmentGraphemes, TextBounds} from '../../css/layout/text';
 import {ImageElementContainer} from '../../dom/replaced-elements/image-element-container';
 import {contentBox} from '../box-sizing';
 import {CanvasElementContainer} from '../../dom/replaced-elements/canvas-element-container';
 import {SVGElementContainer} from '../../dom/replaced-elements/svg-element-container';
-import {ReplacedElementContainer} from '../../dom/replaced-elements/index';
+import {ReplacedElementContainer} from '../../dom/replaced-elements';
 import {EffectTarget, IElementEffect, isClipEffect, isOpacityEffect, isTransformEffect} from '../effects';
 import {contains} from '../../core/bitwise';
 import {calculateGradientDirection, calculateRadius, processColorStops} from '../../css/types/functions/gradient';
@@ -44,7 +44,6 @@ import {PAINT_ORDER_LAYER} from '../../css/property-descriptors/paint-order';
 import {Renderer} from '../renderer';
 import {Context} from '../../core/context';
 import {DIRECTION} from '../../css/property-descriptors/direction';
-import {splitGraphemes} from 'text-segmentation';
 
 export type RenderConfigurations = RenderOptions & {
     backgroundColor: Color | null;
@@ -149,7 +148,7 @@ export class CanvasRenderer extends Renderer {
         if (letterSpacing === 0) {
             this.ctx.fillText(text.text, text.bounds.left, text.bounds.top + baseline);
         } else {
-            const letters = splitGraphemes(text.text);
+            const letters = segmentGraphemes(text.text);
             letters.reduce((left, letter) => {
                 this.ctx.fillText(letter, left, text.bounds.top + baseline);
 
@@ -162,7 +161,7 @@ export class CanvasRenderer extends Renderer {
         const fontVariant = styles.fontVariant
             .filter((variant) => variant === 'normal' || variant === 'small-caps')
             .join('');
-        const fontFamily = styles.fontFamily.join(', ');
+        const fontFamily = fixIOSSystemFonts(styles.fontFamily).join(', ');
         const fontSize = isDimensionToken(styles.fontSize)
             ? `${styles.fontSize.number}${styles.fontSize.unit}`
             : `${styles.fontSize.number}px`;
@@ -947,3 +946,12 @@ const canvasTextAlign = (textAlign: TEXT_ALIGN): CanvasTextAlign => {
             return 'left';
     }
 };
+
+// see https://github.com/niklasvh/html2canvas/pull/2645
+const iOSBrokenFonts = ['-apple-system', 'system-ui'];
+
+const fixIOSSystemFonts = (fontFamilies: string[]): string[] => {
+    return /iPhone OS 15_(0|1)/.test(window.navigator.userAgent)
+        ? fontFamilies.filter((fontFamily) => iOSBrokenFonts.indexOf(fontFamily) === -1)
+        : fontFamilies;
+};
diff --git a/tests/assets/cc0-video.mp4 b/tests/assets/cc0-video.mp4
new file mode 100644
index 0000000..cd869bd
Binary files /dev/null and b/tests/assets/cc0-video.mp4 differ
diff --git a/tests/reftests/images/video.html b/tests/reftests/images/video.html
new file mode 100644
index 0000000..d33f817
--- /dev/null
+++ b/tests/reftests/images/video.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Video tests</title>
+    <script type="text/javascript" src="../../test.js"></script>
+</head>
+<body>
+<h2>Same origin</h2>
+<video controls width="250">
+    <source src="../../assets/cc0-video.mp4" type="video/mp4">
+    Sorry, your browser doesn't support embedded videos.
+</video>
+<h2>Cross-origin (doesn't taint)</h2>
+<video controls width="250">
+    <source src="http://localhost:8081/cors/tests/assets/cc0-video.mp4" type="video/mp4">
+    Sorry, your browser doesn't support embedded videos.
+</video>
+</body>
+</html>
diff --git a/tests/reftests/text/lang/chinese.html b/tests/reftests/text/lang/chinese.html
index da5c696..9aed4d2 100644
--- a/tests/reftests/text/lang/chinese.html
+++ b/tests/reftests/text/lang/chinese.html
@@ -11,6 +11,13 @@
         float: left;
       }
 
+      .apple-system {
+          font-family: -apple-system, Arial;
+      }
+
+      .system-ui {
+          font-family: system-ui, Arial;
+      }
     </style>
   </head>
   <body>
@@ -32,5 +39,7 @@
       </p><p>&nbsp;&nbsp;&nbsp;&nbsp;〔13〕 法捷耶夫（一九○一——一九五六），苏联名作家。他所作的小说《毁灭》于一九二七年出版，内容是描写苏联国内战争时期由苏联远东滨海边区工人、农民和革命知识分子所组成的一支游击队同国内反革命白卫军以及日本武装干涉军进行斗争的故事。这部小说曾由鲁迅译为汉文。
       </p><p>&nbsp;&nbsp;&nbsp;&nbsp;〔14〕 见鲁迅《集外集·自嘲》（《鲁迅全集》第7卷，人民文学出版社1981年版，第147页）。</p>
     </div>
+    <div class="apple-system">中文</div>
+    <div class="system-ui">中文</div>
   </body>
 </html>
diff --git a/tests/reftests/text/text.html b/tests/reftests/text/text.html
index ae1f46f..66e4021 100644
--- a/tests/reftests/text/text.html
+++ b/tests/reftests/text/text.html
@@ -149,6 +149,6 @@
     <span>[AB / CD]</span>
 </div>
 <div>Emojis 🤷🏾‍♂️👨‍👩‍👧‍👦 :)</div>
-<div style="letter-spacing: 2px">Emojis with letter-spacing 🤷🏾‍♂️👨‍👩‍👧‍👦 :)</div>
+<div style="letter-spacing: 2px">Emojis with letter-spacing 🤷🏾‍♂️👨‍👩‍👧‍👦 :) ❤️❤️❤️👨‍❤️‍💋‍👨👨‍❤️‍👨</div>
 </body>
 </html>
diff --git a/tests/reftests/webcomponents/autonomous-custom-element.js b/tests/reftests/webcomponents/autonomous-custom-element.js
index 659cb56..80608f9 100644
--- a/tests/reftests/webcomponents/autonomous-custom-element.js
+++ b/tests/reftests/webcomponents/autonomous-custom-element.js
@@ -40,6 +40,10 @@ class AutonomousCustomElement extends HTMLElement {
         wrapper.appendChild(img);
         wrapper.appendChild(info);
     }
+
+    connectedCallback() {
+        this.shadowRoot.adoptedStyleSheets = [sheet];
+    }
 }
 
 customElements.define('autonomous-custom-element', AutonomousCustomElement);
diff --git a/tests/reftests/webcomponents/webcomponents.html b/tests/reftests/webcomponents/webcomponents.html
index cfa59f1..c4245f5 100644
--- a/tests/reftests/webcomponents/webcomponents.html
+++ b/tests/reftests/webcomponents/webcomponents.html
@@ -3,10 +3,11 @@
 <head>
     <title>Web components tests</title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
+    <script>
+        const sheet = new CSSStyleSheet();
+        sheet.replaceSync('* { color: red !important; }')
+    </script>
     <script type="text/javascript" src="../../test.js"></script>
-    <style>
-
-    </style>
 </head>
 <body>
 <div>
diff --git a/tests/server.ts b/tests/server.ts
index b9f6ca6..7ed90e3 100644
--- a/tests/server.ts
+++ b/tests/server.ts
@@ -12,7 +12,7 @@ const mkdirp = require('mkdirp');
 
 export const app = express();
 app.use('/', serveIndex(path.resolve(__dirname, '../'), {icons: true}));
-app.use('/', express.static(path.resolve(__dirname, '../')));
+app.use([/^\/src($|\/)/, '/'], express.static(path.resolve(__dirname, '../')));
 
 export const corsApp = express();
 corsApp.use('/proxy', proxy());
diff --git a/www/.gitignore b/www/.gitignore
index e78c007..fe89f87 100644
--- a/www/.gitignore
+++ b/www/.gitignore
@@ -9,3 +9,5 @@ yarn-error.log
 src/results.json
 static/tests/preview.js
 src/preview.js
+.docusaurus
+build/