diff --git a/baselines/dom.generated.d.ts b/baselines/dom.generated.d.ts
index d3b64fd20..e3e2aa222 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: {
@@ -9035,6 +9041,9 @@ 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..752d805cb 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: {
@@ -9026,6 +9032,9 @@ 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..0b4e51a03 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: {
@@ -9035,6 +9041,9 @@ 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..0a3718b0e 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": {
diff --git a/unittests/files/nodeValue.ts b/unittests/files/nodeValue.ts
new file mode 100644
index 000000000..1cc664ce3
--- /dev/null
+++ b/unittests/files/nodeValue.ts
@@ -0,0 +1,26 @@
+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;
+
+const div = document.createElement("div");
+assertType<string>()(div.textContent)();
+div.textContent = null;
+
+const text = document.createTextNode("hello");
+assertType<string>()(text.textContent)();
+
+assertType<string | null>()(document.textContent)();
+
+const type = document.doctype!;
+assertType<string | null>()(type.textContent)();
+
+export {};