handle special null case when hydrating

Rich-Harris · Rich-Harris · commit 3f33d3557321 · 2019-09-08T18:09:27.000-04:00
diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
@@ -162,7 +162,7 @@ export function claim_text(nodes, data) {
 	for (let i = 0; i < nodes.length; i += 1) {
 		const node = nodes[i];
 		if (node.nodeType === 3) {
-			node.data = data;
+			node.data = '' + data;
 			return nodes.splice(i, 1)[0];
 		}
 	}
diff --git a/test/hydration/samples/dynamic-text-nil/_after.html b/test/hydration/samples/dynamic-text-nil/_after.html
@@ -1,2 +1,2 @@
-<p></p>
+<p>null</p>
 <p>undefined</p>

Original file line number	Diff line number	Diff line change
`@@ -162,7 +162,7 @@ export function claim_text(nodes, data) {`
`162`	`162`	`for (let i = 0; i < nodes.length; i += 1) {`
`163`	`163`	`const node = nodes[i];`
`164`	`164`	`if (node.nodeType === 3) {`
`165`		`- node.data = data;`
	`165`	`+ node.data = '' + data;`
`166`	`166`	`return nodes.splice(i, 1)[0];`
`167`	`167`	`}`
`168`	`168`	`}`