init

src/runtime/internal/Component.ts

@@ -1,6 +1,7 @@
 import { add_render_callback, flush, schedule_update, dirty_components } from './scheduler';
 import { current_component, set_current_component } from './lifecycle';
-import { blank_object, is_function, run, run_all, noop } from './utils';
+import { blank_object, is_function, run, run_all } from './utils';
+import { noop } from './environment';
 import { children, detach } from './dom';
 import { transition_in } from './transitions';
 

src/runtime/internal/animations.ts

@@ -1,5 +1,5 @@
-import { identity as linear, noop } from './utils';
-import { now } from './environment';
+import { identity as linear } from './utils';
+import { now, noop } from './environment';
 import { loop } from './loop';
 import { create_rule, delete_rule } from './style_manager';
 import { AnimationConfig } from '../animate';

src/runtime/internal/dom.ts

@@ -1,4 +1,5 @@
 import { has_prop } from "./utils";
+import { is_cors } from "./environment";
 
 export function append(target: Node, node: Node) {
 	target.appendChild(node);
@@ -234,26 +235,6 @@ export function select_multiple_value(select) {
 	return [].map.call(select.querySelectorAll(':checked'), option => option.__value);
 }
 
-// unfortunately this can't be a constant as that wouldn't be tree-shakeable
-// so we cache the result instead
-let crossorigin: boolean;
-
-export function is_crossorigin() {
-	if (crossorigin === undefined) {
-		crossorigin = false;
-
-		try {
-			if (typeof window !== 'undefined' && window.parent) {
-				void window.parent.document;
-			}
-		} catch (error) {
-			crossorigin = true;
-		}
-	}
-
-	return crossorigin;
-}
-
 export function add_resize_listener(node: HTMLElement, fn: () => void) {
 	const computed_style = getComputedStyle(node);
 	const z_index = (parseInt(computed_style.zIndex) || 0) - 1;
@@ -270,11 +251,9 @@ export function add_resize_listener(node: HTMLElement, fn: () => void) {
 	iframe.setAttribute('aria-hidden', 'true');
 	iframe.tabIndex = -1;
 
-	const crossorigin = is_crossorigin();
-
 	let unsubscribe: () => void;
 
-	if (crossorigin) {
+	if (is_cors) {
 		iframe.src = `data:text/html,<script>onresize=function(){parent.postMessage(0,'*')}</script>`;
 		unsubscribe = listen(window, 'message', (event: MessageEvent) => {
 			if (event.source === iframe.contentWindow) fn();
@@ -289,7 +268,7 @@ export function add_resize_listener(node: HTMLElement, fn: () => void) {
 	append(node, iframe);
 
 	return () => {
-		if (crossorigin) {
+		if (is_cors) {
 			unsubscribe();
 		} else if (unsubscribe && iframe.contentWindow) {
 			unsubscribe();

src/runtime/internal/environment.ts

@@ -1,12 +1,23 @@
-import { noop } from './utils';
-
-export const is_client = typeof window !== 'undefined';
-
-export let now: () => number = is_client
-	? () => window.performance.now()
-	: () => Date.now();
-
-export let raf = is_client ? cb => requestAnimationFrame(cb) : noop;
+export function noop() {}
+export const is_browser = typeof window !== 'undefined';
+export const is_iframe = is_browser && window.self !== window.top;
+export const is_cors =
+	is_iframe &&
+	/*#__PURE__*/ (() => {
+		try {
+			if (window.parent) void window.parent.document;
+			return false;
+		} catch (error) {
+			return true;
+		}
+	})();
+export const has_Symbol = typeof Symbol === 'function';
+/* eslint-disable no-var */
+declare var global: any;
+export const globals = is_browser ? window : typeof globalThis !== 'undefined' ? globalThis : global;
+export const resolved_promise = Promise.resolve();
+export let now = is_browser ? window.performance.now.bind(window.performance) : Date.now.bind(Date);
+export let raf = is_browser ? requestAnimationFrame : noop;
 
 // used internally for testing
 export function set_now(fn) {

src/runtime/internal/globals.ts

@@ -1,7 +0,0 @@
-declare const global: any;
-
-export const globals = (typeof window !== 'undefined'
-	? window
-	: typeof globalThis !== 'undefined'
-	? globalThis
-	: global) as unknown as typeof globalThis;

src/runtime/internal/index.ts

@@ -2,7 +2,6 @@ export * from './animations';
 export * from './await_block';
 export * from './dom';
 export * from './environment';
-export * from './globals';
 export * from './keyed_each';
 export * from './lifecycle';
 export * from './loop';

src/runtime/internal/scheduler.ts

@@ -1,5 +1,6 @@
 import { run_all } from './utils';
 import { set_current_component } from './lifecycle';
+import { resolved_promise } from './environment';
 
 export const dirty_components = [];
 export const intros = { enabled: false };
@@ -8,7 +9,6 @@ export const binding_callbacks = [];
 const render_callbacks = [];
 const flush_callbacks = [];
 
-const resolved_promise = Promise.resolve();
 let update_scheduled = false;
 
 export function schedule_update() {

src/runtime/internal/transitions.ts

@@ -1,5 +1,5 @@
-import { identity as linear, is_function, noop, run_all } from './utils';
-import { now } from "./environment";
+import { identity as linear, is_function, run_all } from './utils';
+import { now, noop } from "./environment";
 import { loop } from './loop';
 import { create_rule, delete_rule } from './style_manager';
 import { custom_event } from './dom';

src/runtime/internal/utils.ts

@@ -1,5 +1,4 @@
-export function noop() {}
-
+import { noop } from './environment';
 export const identity = x => x;
 
 export function assign<T, S>(tar: T, src: S): T & S {