diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index d3b64fd20..2db623fea 100644
--- a/baselines/dom.generated.d.ts
+++ b/baselines/dom.generated.d.ts
@@ -2990,6 +2990,9 @@ interface Attr extends Node {
     readonly specified: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Attr/value) */
     value: string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var Attr: {
@@ -6531,6 +6534,9 @@ interface CharacterData extends Node, ChildNode, NonDocumentTypeChildNode {
     replaceData(offset: number, count: number, data: string): void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CharacterData/substringData) */
     substringData(offset: number, count: number): string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var CharacterData: {
@@ -8508,6 +8514,8 @@ interface Document extends Node, DocumentOrShadowRoot, FontFaceSource, GlobalEve
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/writeln)
      */
     writeln(...text: string[]): void;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): null;
     addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
     removeEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
@@ -8529,6 +8537,9 @@ declare var Document: {
 interface DocumentFragment extends Node, NonElementParentNode, ParentNode {
     readonly ownerDocument: Document;
     getElementById(elementId: string): HTMLElement | null;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var DocumentFragment: {
@@ -8602,6 +8613,8 @@ interface DocumentType extends Node, ChildNode {
     readonly publicId: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DocumentType/systemId) */
     readonly systemId: string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): null;
 }
 
 declare var DocumentType: {
@@ -9035,6 +9048,9 @@ interface Element extends Node, ARIAMixin, Animatable, ChildNode, NonDocumentTyp
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Element/matches)
      */
     webkitMatchesSelector(selectors: string): boolean;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
     addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
     removeEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
diff --git a/baselines/ts5.5/dom.generated.d.ts b/baselines/ts5.5/dom.generated.d.ts
index 31829ff26..d877dcbdc 100644
--- a/baselines/ts5.5/dom.generated.d.ts
+++ b/baselines/ts5.5/dom.generated.d.ts
@@ -2990,6 +2990,9 @@ interface Attr extends Node {
     readonly specified: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Attr/value) */
     value: string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var Attr: {
@@ -6524,6 +6527,9 @@ interface CharacterData extends Node, ChildNode, NonDocumentTypeChildNode {
     replaceData(offset: number, count: number, data: string): void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CharacterData/substringData) */
     substringData(offset: number, count: number): string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var CharacterData: {
@@ -8501,6 +8507,8 @@ interface Document extends Node, DocumentOrShadowRoot, FontFaceSource, GlobalEve
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/writeln)
      */
     writeln(...text: string[]): void;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): null;
     addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
     removeEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
@@ -8522,6 +8530,9 @@ declare var Document: {
 interface DocumentFragment extends Node, NonElementParentNode, ParentNode {
     readonly ownerDocument: Document;
     getElementById(elementId: string): HTMLElement | null;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var DocumentFragment: {
@@ -8595,6 +8606,8 @@ interface DocumentType extends Node, ChildNode {
     readonly publicId: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DocumentType/systemId) */
     readonly systemId: string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): null;
 }
 
 declare var DocumentType: {
@@ -9026,6 +9039,9 @@ interface Element extends Node, ARIAMixin, Animatable, ChildNode, NonDocumentTyp
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Element/matches)
      */
     webkitMatchesSelector(selectors: string): boolean;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
     addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
     removeEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
diff --git a/baselines/ts5.6/dom.generated.d.ts b/baselines/ts5.6/dom.generated.d.ts
index 435ce4c60..9243a444a 100644
--- a/baselines/ts5.6/dom.generated.d.ts
+++ b/baselines/ts5.6/dom.generated.d.ts
@@ -2990,6 +2990,9 @@ interface Attr extends Node {
     readonly specified: boolean;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/Attr/value) */
     value: string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var Attr: {
@@ -6531,6 +6534,9 @@ interface CharacterData extends Node, ChildNode, NonDocumentTypeChildNode {
     replaceData(offset: number, count: number, data: string): void;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/CharacterData/substringData) */
     substringData(offset: number, count: number): string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var CharacterData: {
@@ -8508,6 +8514,8 @@ interface Document extends Node, DocumentOrShadowRoot, FontFaceSource, GlobalEve
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/writeln)
      */
     writeln(...text: string[]): void;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): null;
     addEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
     removeEventListener<K extends keyof DocumentEventMap>(type: K, listener: (this: Document, ev: DocumentEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
@@ -8529,6 +8537,9 @@ declare var Document: {
 interface DocumentFragment extends Node, NonElementParentNode, ParentNode {
     readonly ownerDocument: Document;
     getElementById(elementId: string): HTMLElement | null;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
 }
 
 declare var DocumentFragment: {
@@ -8602,6 +8613,8 @@ interface DocumentType extends Node, ChildNode {
     readonly publicId: string;
     /** [MDN Reference](https://developer.mozilla.org/docs/Web/API/DocumentType/systemId) */
     readonly systemId: string;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): null;
 }
 
 declare var DocumentType: {
@@ -9035,6 +9048,9 @@ interface Element extends Node, ARIAMixin, Animatable, ChildNode, NonDocumentTyp
      * [MDN Reference](https://developer.mozilla.org/docs/Web/API/Element/matches)
      */
     webkitMatchesSelector(selectors: string): boolean;
+    /** [MDN Reference](https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent) */
+    get textContent(): string;
+    set textContent(value: string | null);
     addEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, options?: boolean | AddEventListenerOptions): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
     removeEventListener<K extends keyof ElementEventMap>(type: K, listener: (this: Element, ev: ElementEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
diff --git a/inputfiles/addedTypes.jsonc b/inputfiles/addedTypes.jsonc
index ff6e0bbe0..ddb79b34f 100644
--- a/inputfiles/addedTypes.jsonc
+++ b/inputfiles/addedTypes.jsonc
@@ -801,6 +801,13 @@
                                     ]
                                 }
                             }
+                        },
+                        "textContent": {
+                            "mdnUrl": "https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent",
+                            "overrideSignatures": [
+                                "get textContent(): string",
+                                "set textContent(value: string | null)"
+                            ]
                         }
                     }
                 },
@@ -1228,6 +1235,17 @@
             },
             "Attr": {
                 "name": "Attr",
+                "methods": {
+                    "method": {
+                        "textContent": {
+                            "mdnUrl": "https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent",
+                            "overrideSignatures": [
+                                "get textContent(): string",
+                                "set textContent(value: string | null)"
+                            ]
+                        }
+                    }
+                },
                 "properties": {
                     "property": {
                         "ownerDocument": {
@@ -1240,6 +1258,17 @@
             },
             "CharacterData": {
                 "name": "CharacterData",
+                "methods": {
+                    "method": {
+                        "textContent": {
+                            "mdnUrl": "https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent",
+                            "overrideSignatures": [
+                                "get textContent(): string",
+                                "set textContent(value: string | null)"
+                            ]
+                        }
+                    }
+                },
                 "properties": {
                     "property": {
                         "ownerDocument": {
@@ -1260,6 +1289,16 @@
                             "type": "Document"
                         }
                     }
+                },
+                "methods": {
+                    "method": {
+                        "textContent": {
+                            "mdnUrl": "https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent",
+                            "overrideSignatures": [
+                                "get textContent(): null"
+                            ]
+                        }
+                    }
                 }
             },
             "ProcessingInstruction": {
diff --git a/inputfiles/overridingTypes.jsonc b/inputfiles/overridingTypes.jsonc
index d87d431f5..f7332d04d 100644
--- a/inputfiles/overridingTypes.jsonc
+++ b/inputfiles/overridingTypes.jsonc
@@ -831,6 +831,12 @@
                                     "overrideType": "NodeListOf<HTMLElement>"
                                 }
                             }
+                        },
+                        "textContent": {
+                            "mdnUrl": "https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent",
+                            "overrideSignatures": [
+                                "get textContent(): null"
+                            ]
                         }
                     }
                 },
@@ -897,6 +903,13 @@
                             "overrideSignatures": [
                                 "getElementById(elementId: string): HTMLElement | null"
                             ]
+                        },
+                        "textContent": {
+                            "mdnUrl": "https://developer.mozilla.org/en-US/docs/Web/API/Node/textContent",
+                            "overrideSignatures": [
+                                "get textContent(): string",
+                                "set textContent(value: string | null)"
+                            ]
                         }
                     }
                 },
diff --git a/unittests/files/textContent.ts b/unittests/files/textContent.ts
new file mode 100644
index 000000000..ad0ed1d79
--- /dev/null
+++ b/unittests/files/textContent.ts
@@ -0,0 +1,48 @@
+declare const assertType: <T>() => <T1>(
+  _x: T1,
+) => StrictEqual<T, T1> extends true
+  ? () => void
+  : T1 extends T
+    ? { error: "Left side is not assignable to right side" }
+    : { error: "Right side is not assignable to left side" };
+
+type StrictEqual<X, Y> =
+  (<T>() => T extends X ? 1 : 2) extends <T>() => T extends Y ? 1 : 2
+    ? true
+    : false;
+
+// string:
+declare const element: Element;
+assertType<string>()(element.textContent)();
+element.textContent = null;
+
+declare const characterData: CharacterData;
+assertType<string>()(characterData.textContent)();
+characterData.textContent = null;
+
+declare const text: Text;
+assertType<string>()(text.textContent)();
+text.textContent = null;
+
+declare const comment: Comment;
+assertType<string>()(comment.textContent)();
+comment.textContent = null;
+
+declare const processingInstruction: ProcessingInstruction;
+assertType<string>()(processingInstruction.textContent)();
+processingInstruction.textContent = null;
+
+declare const documentFragment: DocumentFragment;
+assertType<string>()(documentFragment.textContent)();
+
+declare const attr: Attr;
+assertType<string>()(attr.textContent)();
+attr.textContent = null;
+
+// null:
+assertType<null>()(document.textContent)();
+
+declare const documentType: DocumentType;
+assertType<null>()(documentType.textContent)();
+
+export {};