treat requestAnimationFrame as a noop on the server

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "svelte",
-  "version": "3.4.0",
+  "version": "3.4.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

src/compile/render-dom/wrappers/Element/index.ts

@@ -455,7 +455,7 @@ export default class ElementWrapper extends Wrapper {
 					function ${handler}() {
 						${animation_frame && deindent`
 						cancelAnimationFrame(${animation_frame});
-						if (!${this.var}.paused) ${animation_frame} = requestAnimationFrame(${handler});`}
+						if (!${this.var}.paused) ${animation_frame} = @raf(${handler});`}
 						${needs_lock && `${lock} = true;`}
 						ctx.${handler}.call(${this.var}${contextual_dependencies.size > 0 ? ', ctx' : ''});
 					}

src/internal/loop.js

@@ -1,4 +1,4 @@
-import { now } from './utils.js';
+import { now, raf } from './utils.js';
 
 const tasks = new Set();
 let running = false;
@@ -12,7 +12,7 @@ function run_tasks() {
 	});
 
 	running = tasks.size > 0;
-	if (running) requestAnimationFrame(run_tasks);
+	if (running) raf(run_tasks);
 }
 
 export function clear_loops() {
@@ -26,7 +26,7 @@ export function loop(fn) {
 
 	if (!running) {
 		running = true;
-		requestAnimationFrame(run_tasks);
+		raf(run_tasks);
 	}
 
 	return {

src/internal/style_manager.js

@@ -1,4 +1,5 @@
 import { element } from './dom.js';
+import { raf } from './utils.js';
 
 let stylesheet;
 let active = 0;
@@ -56,7 +57,7 @@ export function delete_rule(node, name) {
 }
 
 export function clear_rules() {
-	requestAnimationFrame(() => {
+	raf(() => {
 		if (active) return;
 		let i = stylesheet.cssRules.length;
 		while (i--) stylesheet.deleteRule(i);

src/internal/utils.js

@@ -80,7 +80,9 @@ export function exclude_internal_props(props) {
 	return result;
 }
 
-export let now = typeof window !== 'undefined'
+const is_client = typeof window !== 'undefined';
+
+export let now = is_client
 	? () => window.performance.now()
 	: () => Date.now();
 
@@ -88,3 +90,5 @@ export let now = typeof window !== 'undefined'
 export function set_now(fn) {
 	now = fn;
 }
+
+export const raf = is_client ? requestAnimationFrame : noop;