Fix bird not flying to right location when iOS address bar is minimized

dist/birb.js

@@ -187,6 +187,27 @@
 		return layer;
 	}
 
+	/**
+	 * The height of the inner browser window
+	 * Will be the same as getFixedWindowHeight() on most browsers
+	 * On iOS, it will vary to be the height excluding the current address bar size (potentially greater than fixed height)
+	 */
+	function getWindowHeight() {
+		// Necessary because iOS 26 Safari is terrible and won't render
+		// fixed/sticky elements behind the address bar
+		return window.innerHeight;
+	}
+
+	/**
+	 * The fixed height of the inner browser window
+	 * Will be the same as getWindowHeight() on most browsers
+	 * On iOS, it will always be the height of the window when the address bar is fully expanded
+	 * @returns The true height of the inner browser window
+	 */
+	function getFixedWindowHeight() {
+		return document.documentElement.clientHeight;
+	}
+
 	/** Indicators for parts of the base bird sprite sheet */
 	const Sprite = {
 		THEME_HIGHLIGHT: "theme-highlight",
@@ -752,7 +773,8 @@
 			let bottom;
 			if (this.isAbsolutePositioned) {
 				// Position is absolute, convert from fixed
-				bottom = y - window.scrollY;
+				// Account for address bar shrinkage on iOS
+				bottom = y - window.scrollY - (getWindowHeight() - getFixedWindowHeight());
 			} else {
 				// Position is fixed
 				bottom = y;
@@ -1652,7 +1674,7 @@
 				insertModal(`${birdBirb()} Mode`, message);
 			}),
 			new Separator(),
-			new MenuItem("2025.10.28.95", () => { alert("Thank you for using Pocket Bird! You are on version: 2025.10.28.95"); }, false),
+			new MenuItem("2025.10.28.152", () => { alert("Thank you for using Pocket Bird! You are on version: 2025.10.28.152"); }, false),
 		];
 
 		const styleElement = document.createElement("style");
@@ -1968,7 +1990,7 @@
 			targetY = getFocusedY();
 			// Adjust startY to account for scrolling
 			startY += targetY - oldTargetY;
-			if (targetY < 0 || targetY > window.innerHeight) {
+			if (targetY < 0 || targetY > getWindowHeight()) {
 				// Fly to another element or the ground if the focused element moves out of bounds
 				flySomewhere();
 			}
@@ -2098,8 +2120,8 @@
 				return;
 			}
 			const y = parseInt(feather.style.top || "0") + FEATHER_FALL_SPEED;
-			feather.style.top = `${Math.min(y, window.innerHeight - feather.offsetHeight)}px`;
+			feather.style.top = `${Math.min(y, getWindowHeight() - feather.offsetHeight)}px`;
-			if (y < window.innerHeight - feather.offsetHeight) {
+			if (y < getWindowHeight() - feather.offsetHeight) {
 				feather.style.left = `${Math.sin(3.14 * 2 * (ticks / 120)) * 25}px`;
 			}
 		}
@@ -2109,7 +2131,7 @@
 		 */
 		function centerElement(element) {
 			element.style.left = `${window.innerWidth / 2 - element.offsetWidth / 2}px`;
-			element.style.top = `${window.innerHeight / 2 - element.offsetHeight / 2}px`;
+			element.style.top = `${getWindowHeight() / 2 - element.offsetHeight / 2}px`;
 		}
 
 		/**
@@ -2141,7 +2163,7 @@
 				// Right side
 				x -= (menu.offsetWidth + offset) * UI_CSS_SCALE;
 			}
-			if (y > window.innerHeight / 2) {
+			if (y > getWindowHeight() / 2) {
 				// Top side
 				y -= (menu.offsetHeight + offset + 10) * UI_CSS_SCALE;
 			} else {
@@ -2256,7 +2278,7 @@
 			const dy = targetY - startY;
 			const distance = Math.sqrt(dx * dx + dy * dy);
 			const time = Date.now() - stateStart;
-			if (distance > Math.max(window.innerWidth, window.innerHeight) / 2) {
+			if (distance > Math.max(window.innerWidth, getWindowHeight()) / 2) {
 				speed *= 1.3;
 			}
 			const amount = Math.min(1, time / (distance / speed));
@@ -2282,23 +2304,7 @@
 		}
 
 		function getFocusedY() {
-			return getFullWindowHeight() - focusedBounds.top;
+			return getWindowHeight() - focusedBounds.top;
-		}
-
-		/**
-		 * @returns The render-safe height of the inner browser window
-		 */
-		function getSafeWindowHeight() {
-			// Necessary because iOS 26 Safari is terrible and won't render
-			// fixed elements behind the address bar
-			return window.innerHeight;
-		}
-
-		/**
-		 * @returns The true height of the inner browser window
-		 */
-		function getFullWindowHeight() {
-			return document.documentElement.clientHeight;
 		}
 
 		/**
@@ -2317,7 +2323,7 @@
 
 		function focusOnGround() {
 			focusedElement = null;
-			focusedBounds = { left: 0, right: window.innerWidth, top: getSafeWindowHeight() };
+			updateFocusedElementBounds();
 			flyTo(Math.random() * window.innerWidth, 0);
 		}
 
@@ -2333,7 +2339,7 @@
 			const elements = document.querySelectorAll("img, video, .birb-sticky-note");
 			const inWindow = Array.from(elements).filter((img) => {
 				const rect = img.getBoundingClientRect();
-				return rect.left >= 0 && rect.top >= MIN_FOCUS_ELEMENT_TOP && rect.right <= window.innerWidth && rect.top <= window.innerHeight;
+				return rect.left >= 0 && rect.top >= MIN_FOCUS_ELEMENT_TOP && rect.right <= window.innerWidth && rect.top <= getWindowHeight();
 			});
 			/** @type {HTMLElement[]} */
 			// @ts-expect-error
@@ -2371,7 +2377,7 @@
 		function updateFocusedElementBounds() {
 			if (focusedElement === null) {
 				// Update ground location to bottom of window
-				focusedBounds = { left: 0, right: window.innerWidth, top: getFullWindowHeight() };
+				focusedBounds = { left: 0, right: window.innerWidth, top: getWindowHeight() };
 				return;
 			}
 			let { left, right, top } = focusedElement.getBoundingClientRect();

dist/birb.user.js

@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         Pocket Bird
 // @namespace    https://idreesinc.com
-// @version      2025.10.28.95
+// @version      2025.10.28.152
 // @description  birb
 // @author       Idrees
 // @downloadURL  https://github.com/IdreesInc/Pocket-Bird/raw/refs/heads/main/dist/birb.user.js
@@ -201,6 +201,27 @@
 		return layer;
 	}
 
+	/**
+	 * The height of the inner browser window
+	 * Will be the same as getFixedWindowHeight() on most browsers
+	 * On iOS, it will vary to be the height excluding the current address bar size (potentially greater than fixed height)
+	 */
+	function getWindowHeight() {
+		// Necessary because iOS 26 Safari is terrible and won't render
+		// fixed/sticky elements behind the address bar
+		return window.innerHeight;
+	}
+
+	/**
+	 * The fixed height of the inner browser window
+	 * Will be the same as getWindowHeight() on most browsers
+	 * On iOS, it will always be the height of the window when the address bar is fully expanded
+	 * @returns The true height of the inner browser window
+	 */
+	function getFixedWindowHeight() {
+		return document.documentElement.clientHeight;
+	}
+
 	/** Indicators for parts of the base bird sprite sheet */
 	const Sprite = {
 		THEME_HIGHLIGHT: "theme-highlight",
@@ -766,7 +787,8 @@
 			let bottom;
 			if (this.isAbsolutePositioned) {
 				// Position is absolute, convert from fixed
-				bottom = y - window.scrollY;
+				// Account for address bar shrinkage on iOS
+				bottom = y - window.scrollY - (getWindowHeight() - getFixedWindowHeight());
 			} else {
 				// Position is fixed
 				bottom = y;
@@ -1666,7 +1688,7 @@
 				insertModal(`${birdBirb()} Mode`, message);
 			}),
 			new Separator(),
-			new MenuItem("2025.10.28.95", () => { alert("Thank you for using Pocket Bird! You are on version: 2025.10.28.95"); }, false),
+			new MenuItem("2025.10.28.152", () => { alert("Thank you for using Pocket Bird! You are on version: 2025.10.28.152"); }, false),
 		];
 
 		const styleElement = document.createElement("style");
@@ -1982,7 +2004,7 @@
 			targetY = getFocusedY();
 			// Adjust startY to account for scrolling
 			startY += targetY - oldTargetY;
-			if (targetY < 0 || targetY > window.innerHeight) {
+			if (targetY < 0 || targetY > getWindowHeight()) {
 				// Fly to another element or the ground if the focused element moves out of bounds
 				flySomewhere();
 			}
@@ -2112,8 +2134,8 @@
 				return;
 			}
 			const y = parseInt(feather.style.top || "0") + FEATHER_FALL_SPEED;
-			feather.style.top = `${Math.min(y, window.innerHeight - feather.offsetHeight)}px`;
+			feather.style.top = `${Math.min(y, getWindowHeight() - feather.offsetHeight)}px`;
-			if (y < window.innerHeight - feather.offsetHeight) {
+			if (y < getWindowHeight() - feather.offsetHeight) {
 				feather.style.left = `${Math.sin(3.14 * 2 * (ticks / 120)) * 25}px`;
 			}
 		}
@@ -2123,7 +2145,7 @@
 		 */
 		function centerElement(element) {
 			element.style.left = `${window.innerWidth / 2 - element.offsetWidth / 2}px`;
-			element.style.top = `${window.innerHeight / 2 - element.offsetHeight / 2}px`;
+			element.style.top = `${getWindowHeight() / 2 - element.offsetHeight / 2}px`;
 		}
 
 		/**
@@ -2155,7 +2177,7 @@
 				// Right side
 				x -= (menu.offsetWidth + offset) * UI_CSS_SCALE;
 			}
-			if (y > window.innerHeight / 2) {
+			if (y > getWindowHeight() / 2) {
 				// Top side
 				y -= (menu.offsetHeight + offset + 10) * UI_CSS_SCALE;
 			} else {
@@ -2270,7 +2292,7 @@
 			const dy = targetY - startY;
 			const distance = Math.sqrt(dx * dx + dy * dy);
 			const time = Date.now() - stateStart;
-			if (distance > Math.max(window.innerWidth, window.innerHeight) / 2) {
+			if (distance > Math.max(window.innerWidth, getWindowHeight()) / 2) {
 				speed *= 1.3;
 			}
 			const amount = Math.min(1, time / (distance / speed));
@@ -2296,23 +2318,7 @@
 		}
 
 		function getFocusedY() {
-			return getFullWindowHeight() - focusedBounds.top;
+			return getWindowHeight() - focusedBounds.top;
-		}
-
-		/**
-		 * @returns The render-safe height of the inner browser window
-		 */
-		function getSafeWindowHeight() {
-			// Necessary because iOS 26 Safari is terrible and won't render
-			// fixed elements behind the address bar
-			return window.innerHeight;
-		}
-
-		/**
-		 * @returns The true height of the inner browser window
-		 */
-		function getFullWindowHeight() {
-			return document.documentElement.clientHeight;
 		}
 
 		/**
@@ -2331,7 +2337,7 @@
 
 		function focusOnGround() {
 			focusedElement = null;
-			focusedBounds = { left: 0, right: window.innerWidth, top: getSafeWindowHeight() };
+			updateFocusedElementBounds();
 			flyTo(Math.random() * window.innerWidth, 0);
 		}
 
@@ -2347,7 +2353,7 @@
 			const elements = document.querySelectorAll("img, video, .birb-sticky-note");
 			const inWindow = Array.from(elements).filter((img) => {
 				const rect = img.getBoundingClientRect();
-				return rect.left >= 0 && rect.top >= MIN_FOCUS_ELEMENT_TOP && rect.right <= window.innerWidth && rect.top <= window.innerHeight;
+				return rect.left >= 0 && rect.top >= MIN_FOCUS_ELEMENT_TOP && rect.right <= window.innerWidth && rect.top <= getWindowHeight();
 			});
 			/** @type {HTMLElement[]} */
 			// @ts-expect-error
@@ -2385,7 +2391,7 @@
 		function updateFocusedElementBounds() {
 			if (focusedElement === null) {
 				// Update ground location to bottom of window
-				focusedBounds = { left: 0, right: window.innerWidth, top: getFullWindowHeight() };
+				focusedBounds = { left: 0, right: window.innerWidth, top: getWindowHeight() };
 				return;
 			}
 			let { left, right, top } = focusedElement.getBoundingClientRect();

manifest.json

@@ -2,7 +2,7 @@
     "manifest_version": 3,
     "name": "Pocket Bird",
     "description": "It's a bird, in your browser. What more could you want?",
-    "version": "2025.10.28.95",
+    "version": "2025.10.28.152",
     "homepage_url": "https://idreesinc.com",
     "icons": {
         "48": "images/icons/transparent/48x48x1.png",

src/application.js

@@ -15,7 +15,8 @@ import {
 	log,
 	debug,
 	error,
-	getLayer
+	getLayer,
+	getWindowHeight
 } from './shared.js';
 import {
 	Sprite,
@@ -541,7 +542,7 @@ Promise.all([
 		targetY = getFocusedY();
 		// Adjust startY to account for scrolling
 		startY += targetY - oldTargetY;
-		if (targetY < 0 || targetY > window.innerHeight) {
+		if (targetY < 0 || targetY > getWindowHeight()) {
 			// Fly to another element or the ground if the focused element moves out of bounds
 			flySomewhere();
 		}
@@ -674,8 +675,8 @@ Promise.all([
 			return;
 		}
 		const y = parseInt(feather.style.top || "0") + FEATHER_FALL_SPEED;
-		feather.style.top = `${Math.min(y, window.innerHeight - feather.offsetHeight)}px`;
+		feather.style.top = `${Math.min(y, getWindowHeight() - feather.offsetHeight)}px`;
-		if (y < window.innerHeight - feather.offsetHeight) {
+		if (y < getWindowHeight() - feather.offsetHeight) {
 			feather.style.left = `${Math.sin(3.14 * 2 * (ticks / 120)) * 25}px`;
 		}
 	}
@@ -685,7 +686,7 @@ Promise.all([
 	 */
 	function centerElement(element) {
 		element.style.left = `${window.innerWidth / 2 - element.offsetWidth / 2}px`;
-		element.style.top = `${window.innerHeight / 2 - element.offsetHeight / 2}px`;
+		element.style.top = `${getWindowHeight() / 2 - element.offsetHeight / 2}px`;
 	}
 
 	/**
@@ -717,7 +718,7 @@ Promise.all([
 			// Right side
 			x -= (menu.offsetWidth + offset) * UI_CSS_SCALE;
 		}
-		if (y > window.innerHeight / 2) {
+		if (y > getWindowHeight() / 2) {
 			// Top side
 			y -= (menu.offsetHeight + offset + 10) * UI_CSS_SCALE;
 		} else {
@@ -833,7 +834,7 @@ Promise.all([
 		const dy = targetY - startY;
 		const distance = Math.sqrt(dx * dx + dy * dy);
 		const time = Date.now() - stateStart;
-		if (distance > Math.max(window.innerWidth, window.innerHeight) / 2) {
+		if (distance > Math.max(window.innerWidth, getWindowHeight()) / 2) {
 			speed *= 1.3;
 		}
 		const amount = Math.min(1, time / (distance / speed));
@@ -859,23 +860,7 @@ Promise.all([
 	}
 
 	function getFocusedY() {
-		return getFullWindowHeight() - focusedBounds.top;
+		return getWindowHeight() - focusedBounds.top;
-	}
-
-	/**
-	 * @returns The render-safe height of the inner browser window
-	 */
-	function getSafeWindowHeight() {
-		// Necessary because iOS 26 Safari is terrible and won't render
-		// fixed elements behind the address bar
-		return window.innerHeight;
-	}
-
-	/**
-	 * @returns The true height of the inner browser window
-	 */
-	function getFullWindowHeight() {
-		return document.documentElement.clientHeight;
 	}
 
 	/**
@@ -894,7 +879,7 @@ Promise.all([
 
 	function focusOnGround() {
 		focusedElement = null;
-		focusedBounds = { left: 0, right: window.innerWidth, top: getSafeWindowHeight() };
+		updateFocusedElementBounds();
 		flyTo(Math.random() * window.innerWidth, 0);
 	}
 
@@ -910,7 +895,7 @@ Promise.all([
 		const elements = document.querySelectorAll("img, video, .birb-sticky-note");
 		const inWindow = Array.from(elements).filter((img) => {
 			const rect = img.getBoundingClientRect();
-			return rect.left >= 0 && rect.top >= MIN_FOCUS_ELEMENT_TOP && rect.right <= window.innerWidth && rect.top <= window.innerHeight;
+			return rect.left >= 0 && rect.top >= MIN_FOCUS_ELEMENT_TOP && rect.right <= window.innerWidth && rect.top <= getWindowHeight();
 		});
 		/** @type {HTMLElement[]} */
 		// @ts-expect-error
@@ -948,7 +933,7 @@ Promise.all([
 	function updateFocusedElementBounds() {
 		if (focusedElement === null) {
 			// Update ground location to bottom of window
-			focusedBounds = { left: 0, right: window.innerWidth, top: getFullWindowHeight() };
+			focusedBounds = { left: 0, right: window.innerWidth, top: getWindowHeight() };
 			return;
 		}
 		let { left, right, top } = focusedElement.getBoundingClientRect();

src/birb.js

@@ -1,4 +1,4 @@
-import { Directions, getLayer } from './shared.js';
+import { Directions, getLayer, getWindowHeight, getFixedWindowHeight } from './shared.js';
 import Layer from './layer.js';
 import Frame from './frame.js';
 import Anim from './anim.js';
@@ -201,7 +201,8 @@ export class Birb {
 		let bottom;
 		if (this.isAbsolutePositioned) {
 			// Position is absolute, convert from fixed
-			bottom = y - window.scrollY;
+			// Account for address bar shrinkage on iOS
+			bottom = y - window.scrollY - (getWindowHeight() - getFixedWindowHeight());
 		} else {
 			// Position is fixed
 			bottom = y;

src/shared.js

@@ -182,4 +182,25 @@ export function getLayer(spriteSheet, spriteIndex, width) {
 		layer.push(spriteSheet[y].slice(spriteIndex * width, (spriteIndex + 1) * width));
 	}
 	return layer;
+}
+
+/**
+ * The height of the inner browser window
+ * Will be the same as getFixedWindowHeight() on most browsers
+ * On iOS, it will vary to be the height excluding the current address bar size (potentially greater than fixed height)
+ */
+export function getWindowHeight() {
+	// Necessary because iOS 26 Safari is terrible and won't render
+	// fixed/sticky elements behind the address bar
+	return window.innerHeight;
+}
+
+/**
+ * The fixed height of the inner browser window
+ * Will be the same as getWindowHeight() on most browsers
+ * On iOS, it will always be the height of the window when the address bar is fully expanded
+ * @returns The true height of the inner browser window
+ */
+export function getFixedWindowHeight() {
+	return document.documentElement.clientHeight;
 }