docs: use Node.TEXT_NODE in more places

site/content/docs/02-template-syntax.md

@@ -893,7 +893,7 @@ A custom transition function can also return a `tick` function, which is called
 	function typewriter(node, { speed = 50 }) {
 		const valid = (
 			node.childNodes.length === 1 &&
-			node.childNodes[0].nodeType === 3
+			node.childNodes[0].nodeType === Node.TEXT_NODE
 		);
 
 		if (!valid) return {};

site/content/examples/09-transitions/04-custom-js-transitions/App.svelte

@@ -4,7 +4,7 @@
 	function typewriter(node, { speed = 50 }) {
 		const valid = (
 			node.childNodes.length === 1 &&
-			node.childNodes[0].nodeType === 3
+			node.childNodes[0].nodeType === Node.TEXT_NODE
 		);
 
 		if (!valid) {
@@ -33,4 +33,4 @@
 	<p in:typewriter>
 		The quick brown fox jumps over the lazy dog
 	</p>
-{/if}
+{/if}

site/content/tutorial/10-transitions/05-custom-js-transitions/app-b/App.svelte

@@ -4,7 +4,7 @@
 	function typewriter(node, { speed = 50 }) {
 		const valid = (
 			node.childNodes.length === 1 &&
-			node.childNodes[0].nodeType === 3
+			node.childNodes[0].nodeType === Node.TEXT_NODE
 		);
 
 		if (!valid) {
@@ -33,4 +33,4 @@
 	<p in:typewriter>
 		The quick brown fox jumps over the lazy dog
 	</p>
-{/if}
+{/if}